<!--
  ~ Licensed to the Apache Software Foundation (ASF) under one or more
  ~ contributor license agreements.  See the NOTICE file distributed with
  ~ this work for additional information regarding copyright ownership.
  ~ The ASF licenses this file to You under the Apache License, Version 2.0
  ~ (the "License"); you may not use this file except in compliance with
  ~ the License.  You may obtain a copy of the License at
  ~
  ~    http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  ~
-->

<!-- Elements added to main will be displayed on all pages -->

<!doctype html>
<html lang="en" class="no-js">
  <head>
    
      <meta charset="utf-8">
      <meta name="viewport" content="width=device-width,initial-scale=1">
      
        <meta name="description" content="Python library for Apache StreamPipes">
      
      
        <meta name="author" content="Apache Software Foundation (ASF)">
      
      
        <link rel="canonical" href="https://streampipes.apache.org/docs/docs/python/latest/latest/reference/model/resource/function_definition/">
      
      
        <link rel="prev" href="../data_stream/">
      
      
        <link rel="next" href="../resource/">
      
      <link rel="icon" href="https://streampipes.apache.org/img/favicon/favicon.png">
      <meta name="generator" content="mkdocs-1.4.2, mkdocs-material-9.1.3">
    
    
        <title>Function definition - Apache StreamPipes Python</title>
      
    
      <link rel="stylesheet" href="../../../../assets/stylesheets/main.c4a75a56.min.css">
      
        
        <link rel="stylesheet" href="../../../../assets/stylesheets/palette.a0c5b2b5.min.css">
      
      
      <link rel="stylesheet" href="../../../../assets/_mkdocstrings.css">
    
      <link rel="stylesheet" href="../../../../stylesheets/extra.css">
    
    <script>__md_scope=new URL("../../../..",location),__md_hash=e=>[...e].reduce((e,_)=>(e<<5)-e+_.charCodeAt(0),0),__md_get=(e,_=localStorage,t=__md_scope)=>JSON.parse(_.getItem(t.pathname+"."+e)),__md_set=(e,_,t=localStorage,a=__md_scope)=>{try{t.setItem(a.pathname+"."+e,JSON.stringify(_))}catch(e){}}</script>
    
      
  <!--
  ~ Licensed to the Apache Software Foundation (ASF) under one or more
  ~ contributor license agreements.  See the NOTICE file distributed with
  ~ this work for additional information regarding copyright ownership.
  ~ The ASF licenses this file to You under the Apache License, Version 2.0
  ~ (the "License"); you may not use this file except in compliance with
  ~ the License.  You may obtain a copy of the License at
  ~
  ~    http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  ~
-->
<script>
    var _paq = window._paq = window._paq || [];
    /* tracker methods like "setCustomDimension" should be called before "trackPageView" */
    /* We explicitly disable cookie tracking to avoid privacy issues */
    _paq.push(['disableCookies']);
    /* Measure a visit to flink.apache.org and nightlies.apache.org/flink as the same visit */
    _paq.push(['trackPageView']);
    _paq.push(['enableLinkTracking']);
    (function () {
        var u = "//analytics.apache.org/";
        _paq.push(['setTrackerUrl', u + 'matomo.php']);
        _paq.push(['setSiteId', '35']);
        var d = document, g = d.createElement('script'), s = d.getElementsByTagName('script')[0];
        g.async = true;
        g.src = u + 'matomo.js';
        s.parentNode.insertBefore(g, s);
    })();
</script>

  
    <script>"undefined"!=typeof __md_analytics&&__md_analytics()</script>
  

  </head>
  
  
    <body dir="ltr" data-md-color-scheme="default" data-md-color-primary="" data-md-color-accent="">
  
    
      <script>var palette=__md_get("__palette");if(palette&&"object"==typeof palette.color)for(var key of Object.keys(palette.color))document.body.setAttribute("data-md-color-"+key,palette.color[key])</script>
    
    <input class="md-toggle" data-md-toggle="drawer" type="checkbox" id="__drawer" autocomplete="off">
    <input class="md-toggle" data-md-toggle="search" type="checkbox" id="__search" autocomplete="off">
    <label class="md-overlay" for="__drawer"></label>
    <div data-md-component="skip">
      
        
        <a href="#streampipes.model.resource.function_definition" class="md-skip">
          Skip to content
        </a>
      
    </div>
    <div data-md-component="announce">
      
    </div>
    
      <div data-md-color-scheme="default" data-md-component="outdated" hidden>
        
      </div>
    
    
<header class="md-header md-header--shadow md-header--lifted" data-md-component="header">
  <nav class="md-header__inner md-grid" aria-label="Header">
    <a href="https://streampipes.apache.org/" title="Apache StreamPipes Python" class="md-header__button md-logo" aria-label="Apache StreamPipes Python" data-md-component="logo">
      
  <img src="https://streampipes.apache.org/img/sp-logo-white-right.png" alt="logo">

    </a>
    <label class="md-header__button md-icon" for="__drawer">
      <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M3 6h18v2H3V6m0 5h18v2H3v-2m0 5h18v2H3v-2Z"/></svg>
    </label>
    <div class="md-header__title" data-md-component="header-title">
      <div class="md-header__ellipsis">
        <div class="md-header__topic">
          <span class="md-ellipsis">
            Apache StreamPipes Python
          </span>
        </div>
        <div class="md-header__topic" data-md-component="header-topic">
          <span class="md-ellipsis">
            
              Function definition
            
          </span>
        </div>
      </div>
    </div>
    
      <form class="md-header__option" data-md-component="palette">
        
          
          <input class="md-option" data-md-color-media="" data-md-color-scheme="default" data-md-color-primary="" data-md-color-accent=""  aria-label="Switch to dark mode"  type="radio" name="__palette" id="__palette_1">
          
            <label class="md-header__button md-icon" title="Switch to dark mode" for="__palette_2" hidden>
              <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 8a4 4 0 0 0-4 4 4 4 0 0 0 4 4 4 4 0 0 0 4-4 4 4 0 0 0-4-4m0 10a6 6 0 0 1-6-6 6 6 0 0 1 6-6 6 6 0 0 1 6 6 6 6 0 0 1-6 6m8-9.31V4h-4.69L12 .69 8.69 4H4v4.69L.69 12 4 15.31V20h4.69L12 23.31 15.31 20H20v-4.69L23.31 12 20 8.69Z"/></svg>
            </label>
          
        
          <input class="md-option" data-md-color-media="" data-md-color-scheme="slate" data-md-color-primary="" data-md-color-accent=""  aria-label="Switch to light mode"  type="radio" name="__palette" id="__palette_2">
          
            <label class="md-header__button md-icon" title="Switch to light mode" for="__palette_1" hidden>
              <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 18c-.89 0-1.74-.2-2.5-.55C11.56 16.5 13 14.42 13 12c0-2.42-1.44-4.5-3.5-5.45C10.26 6.2 11.11 6 12 6a6 6 0 0 1 6 6 6 6 0 0 1-6 6m8-9.31V4h-4.69L12 .69 8.69 4H4v4.69L.69 12 4 15.31V20h4.69L12 23.31 15.31 20H20v-4.69L23.31 12 20 8.69Z"/></svg>
            </label>
          
        
      </form>
    
    
      <label class="md-header__button md-icon" for="__search">
        <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5Z"/></svg>
      </label>
      <div class="md-search" data-md-component="search" role="dialog">
  <label class="md-search__overlay" for="__search"></label>
  <div class="md-search__inner" role="search">
    <form class="md-search__form" name="search">
      <input type="text" class="md-search__input" name="query" aria-label="Search" placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="search-query" required>
      <label class="md-search__icon md-icon" for="__search">
        <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5Z"/></svg>
        <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12Z"/></svg>
      </label>
      <nav class="md-search__options" aria-label="Search">
        
        <button type="reset" class="md-search__icon md-icon" title="Clear" aria-label="Clear" tabindex="-1">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M19 6.41 17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12 19 6.41Z"/></svg>
        </button>
      </nav>
      
    </form>
    <div class="md-search__output">
      <div class="md-search__scrollwrap" data-md-scrollfix>
        <div class="md-search-result" data-md-component="search-result">
          <div class="md-search-result__meta">
            Initializing search
          </div>
          <ol class="md-search-result__list" role="presentation"></ol>
        </div>
      </div>
    </div>
  </div>
</div>
    
    
      <div class="md-header__source">
        <a href="https://github.com/apache/streampipes" title="Go to repository" class="md-source" data-md-component="source">
  <div class="md-source__icon md-icon">
    
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.3.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2023 Fonticons, Inc.--><path d="M439.55 236.05 244 40.45a28.87 28.87 0 0 0-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 0 1-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 0 0 0 40.81l195.61 195.6a28.86 28.86 0 0 0 40.8 0l194.69-194.69a28.86 28.86 0 0 0 0-40.81z"/></svg>
  </div>
  <div class="md-source__repository">
    apache/streampipes
  </div>
</a>
      </div>
    
  </nav>
  
    
<nav class="md-tabs" aria-label="Tabs" data-md-component="tabs">
  <div class="md-grid">
    <ul class="md-tabs__list">
      
        
  <li class="md-tabs__item">
    <a href="../../../.." class="md-tabs__link">
      🏡 Home
    </a>
  </li>

      
    <li class="md-tabs__item">
      <a href="../../../../getting-started/first-steps/" class="md-tabs__link">
        🚀 Getting Started
      </a>
    </li>
  

    <li class="md-tabs__item">
      <a href="../../../../tutorials/1-introduction-to-streampipes-python-client/" class="md-tabs__link">
        🤓 Tutorials
      </a>
    </li>
  

    <li class="md-tabs__item">
      <a href="../../../client/client/" class="md-tabs__link md-tabs__link--active">
        📚 Reference
      </a>
    </li>
  

    </ul>
  </div>
</nav>
    
  
</header>
    
    <div class="md-container" data-md-component="container">
      
      
      <main class="md-main" data-md-component="main">
        <div class="md-main__inner md-grid">
          
            
              <div class="md-sidebar md-sidebar--primary" data-md-component="sidebar" data-md-type="navigation" >
                <div class="md-sidebar__scrollwrap">
                  <div class="md-sidebar__inner">
                    

<nav class="md-nav md-nav--primary md-nav--lifted" aria-label="Navigation" data-md-level="0">
  <label class="md-nav__title" for="__drawer">
    <a href="https://streampipes.apache.org/" title="Apache StreamPipes Python" class="md-nav__button md-logo" aria-label="Apache StreamPipes Python" data-md-component="logo">
      
  <img src="https://streampipes.apache.org/img/sp-logo-white-right.png" alt="logo">

    </a>
    Apache StreamPipes Python
  </label>
  
    <div class="md-nav__source">
      <a href="https://github.com/apache/streampipes" title="Go to repository" class="md-source" data-md-component="source">
  <div class="md-source__icon md-icon">
    
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.3.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2023 Fonticons, Inc.--><path d="M439.55 236.05 244 40.45a28.87 28.87 0 0 0-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 0 1-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 0 0 0 40.81l195.61 195.6a28.86 28.86 0 0 0 40.8 0l194.69-194.69a28.86 28.86 0 0 0 0-40.81z"/></svg>
  </div>
  <div class="md-source__repository">
    apache/streampipes
  </div>
</a>
    </div>
  
  <ul class="md-nav__list" data-md-scrollfix>
    
      
    <li class="md-nav__item">
      <a href="../../../.." class="md-nav__link">
        🏡 Home
      </a>
    </li>
  

    <li class="md-nav__item md-nav__item--nested">
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_2" >
      
      
        <label class="md-nav__link" for="__nav_2" id="__nav_2_label" tabindex="0">
          🚀 Getting Started
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_2_label" aria-expanded="false">
        <label class="md-nav__title" for="__nav_2">
          <span class="md-nav__icon md-icon"></span>
          🚀 Getting Started
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
    <li class="md-nav__item">
      <a href="../../../../getting-started/first-steps/" class="md-nav__link">
        First Steps
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../../getting-started/developing/" class="md-nav__link">
        Developing & Contributing
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../../getting-started/quickstart/" class="md-nav__link">
        Quickstart
      </a>
    </li>
  

        </ul>
      </nav>
    </li>
  

    <li class="md-nav__item md-nav__item--nested">
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3" >
      
      
        <label class="md-nav__link" for="__nav_3" id="__nav_3_label" tabindex="0">
          🤓 Tutorials
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_3_label" aria-expanded="false">
        <label class="md-nav__title" for="__nav_3">
          <span class="md-nav__icon md-icon"></span>
          🤓 Tutorials
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
    <li class="md-nav__item">
      <a href="../../../../tutorials/1-introduction-to-streampipes-python-client/" class="md-nav__link">
        Introduction to StreamPipes Python
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../../tutorials/2-extracting-data-from-the-streampipes-data-lake/" class="md-nav__link">
        Extracting Data from the StreamPipes data lake
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../../tutorials/3-getting-live-data-from-the-streampipes-data-stream/" class="md-nav__link">
        Getting live data from the StreamPipes data stream
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../../tutorials/4-using-online-machine-learning-on-a-streampipes-data-stream/" class="md-nav__link">
        Using Online Machine Learning on a StreamPipes data stream
      </a>
    </li>
  

        </ul>
      </nav>
    </li>
  

    <li class="md-nav__item md-nav__item--active md-nav__item--nested">
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4" checked>
      
      
        <label class="md-nav__link" for="__nav_4" id="__nav_4_label" tabindex="0">
          📚 Reference
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_4_label" aria-expanded="true">
        <label class="md-nav__title" for="__nav_4">
          <span class="md-nav__icon md-icon"></span>
          📚 Reference
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
    <li class="md-nav__item md-nav__item--nested">
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_1" >
      
      
        <label class="md-nav__link" for="__nav_4_1" id="__nav_4_1_label" tabindex="0">
          Client
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="2" aria-labelledby="__nav_4_1_label" aria-expanded="false">
        <label class="md-nav__title" for="__nav_4_1">
          <span class="md-nav__icon md-icon"></span>
          Client
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
    <li class="md-nav__item">
      <a href="../../../client/client/" class="md-nav__link">
        Client
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../client/config/" class="md-nav__link">
        Config
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../client/credential_provider/" class="md-nav__link">
        Credential provider
      </a>
    </li>
  

        </ul>
      </nav>
    </li>
  

    <li class="md-nav__item md-nav__item--nested">
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_2" >
      
      
        <label class="md-nav__link" for="__nav_4_2" id="__nav_4_2_label" tabindex="0">
          Endpoint
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="2" aria-labelledby="__nav_4_2_label" aria-expanded="false">
        <label class="md-nav__title" for="__nav_4_2">
          <span class="md-nav__icon md-icon"></span>
          Endpoint
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
    <li class="md-nav__item">
      <a href="../../../endpoint/endpoint/" class="md-nav__link">
        Endpoint
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../endpoint/exceptions/" class="md-nav__link">
        Exceptions
      </a>
    </li>
  

    <li class="md-nav__item md-nav__item--nested">
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_2_3" >
      
      
        <label class="md-nav__link" for="__nav_4_2_3" id="__nav_4_2_3_label" tabindex="0">
          Api
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="3" aria-labelledby="__nav_4_2_3_label" aria-expanded="false">
        <label class="md-nav__title" for="__nav_4_2_3">
          <span class="md-nav__icon md-icon"></span>
          Api
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
    <li class="md-nav__item">
      <a href="../../../endpoint/api/data_lake_measure/" class="md-nav__link">
        Data lake measure
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../endpoint/api/data_stream/" class="md-nav__link">
        Data stream
      </a>
    </li>
  

        </ul>
      </nav>
    </li>
  

        </ul>
      </nav>
    </li>
  

    <li class="md-nav__item md-nav__item--nested">
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_3" >
      
      
        <label class="md-nav__link" for="__nav_4_3" id="__nav_4_3_label" tabindex="0">
          Function zoo
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="2" aria-labelledby="__nav_4_3_label" aria-expanded="false">
        <label class="md-nav__title" for="__nav_4_3">
          <span class="md-nav__icon md-icon"></span>
          Function zoo
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
    <li class="md-nav__item">
      <a href="../../../function_zoo/river_function/" class="md-nav__link">
        River function
      </a>
    </li>
  

        </ul>
      </nav>
    </li>
  

    <li class="md-nav__item md-nav__item--nested">
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_4" >
      
      
        <label class="md-nav__link" for="__nav_4_4" id="__nav_4_4_label" tabindex="0">
          Functions
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="2" aria-labelledby="__nav_4_4_label" aria-expanded="false">
        <label class="md-nav__title" for="__nav_4_4">
          <span class="md-nav__icon md-icon"></span>
          Functions
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
    <li class="md-nav__item">
      <a href="../../../functions/function_handler/" class="md-nav__link">
        Function handler
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../functions/registration/" class="md-nav__link">
        Registration
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../functions/streampipes_function/" class="md-nav__link">
        Streampipes function
      </a>
    </li>
  

    <li class="md-nav__item md-nav__item--nested">
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_4_4" >
      
      
        <label class="md-nav__link" for="__nav_4_4_4" id="__nav_4_4_4_label" tabindex="0">
          Broker
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="3" aria-labelledby="__nav_4_4_4_label" aria-expanded="false">
        <label class="md-nav__title" for="__nav_4_4_4">
          <span class="md-nav__icon md-icon"></span>
          Broker
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
    <li class="md-nav__item">
      <a href="../../../functions/broker/broker/" class="md-nav__link">
        Broker
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../functions/broker/broker_handler/" class="md-nav__link">
        Broker handler
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../functions/broker/kafka_broker/" class="md-nav__link">
        Kafka broker
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../functions/broker/kafka_message_fetcher/" class="md-nav__link">
        Kafka message fetcher
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../functions/broker/nats_broker/" class="md-nav__link">
        Nats broker
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../functions/broker/output_collector/" class="md-nav__link">
        Output collector
      </a>
    </li>
  

        </ul>
      </nav>
    </li>
  

    <li class="md-nav__item md-nav__item--nested">
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_4_5" >
      
      
        <label class="md-nav__link" for="__nav_4_4_5" id="__nav_4_4_5_label" tabindex="0">
          Utils
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="3" aria-labelledby="__nav_4_4_5_label" aria-expanded="false">
        <label class="md-nav__title" for="__nav_4_4_5">
          <span class="md-nav__icon md-icon"></span>
          Utils
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
    <li class="md-nav__item">
      <a href="../../../functions/utils/async_iter_handler/" class="md-nav__link">
        Async iter handler
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../functions/utils/data_stream_context/" class="md-nav__link">
        Data stream context
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../functions/utils/data_stream_generator/" class="md-nav__link">
        Data stream generator
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../../functions/utils/function_context/" class="md-nav__link">
        Function context
      </a>
    </li>
  

        </ul>
      </nav>
    </li>
  

        </ul>
      </nav>
    </li>
  

    <li class="md-nav__item md-nav__item--active md-nav__item--nested">
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_5" checked>
      
      
        <label class="md-nav__link" for="__nav_4_5" id="__nav_4_5_label" tabindex="0">
          Model
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="2" aria-labelledby="__nav_4_5_label" aria-expanded="true">
        <label class="md-nav__title" for="__nav_4_5">
          <span class="md-nav__icon md-icon"></span>
          Model
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
    <li class="md-nav__item">
      <a href="../../common/" class="md-nav__link">
        Common
      </a>
    </li>
  

    <li class="md-nav__item md-nav__item--nested">
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_5_2" >
      
      
        <label class="md-nav__link" for="__nav_4_5_2" id="__nav_4_5_2_label" tabindex="0">
          Container
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="3" aria-labelledby="__nav_4_5_2_label" aria-expanded="false">
        <label class="md-nav__title" for="__nav_4_5_2">
          <span class="md-nav__icon md-icon"></span>
          Container
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
    <li class="md-nav__item">
      <a href="../../container/data_lake_measures/" class="md-nav__link">
        Data lake measures
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../container/data_streams/" class="md-nav__link">
        Data streams
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../../container/resource_container/" class="md-nav__link">
        Resource container
      </a>
    </li>
  

        </ul>
      </nav>
    </li>
  

    <li class="md-nav__item md-nav__item--active md-nav__item--nested">
      
      
      <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_5_3" checked>
      
      
        <label class="md-nav__link" for="__nav_4_5_3" id="__nav_4_5_3_label" tabindex="0">
          Resource
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <nav class="md-nav" data-md-level="3" aria-labelledby="__nav_4_5_3_label" aria-expanded="true">
        <label class="md-nav__title" for="__nav_4_5_3">
          <span class="md-nav__icon md-icon"></span>
          Resource
        </label>
        <ul class="md-nav__list" data-md-scrollfix>
          
            
    <li class="md-nav__item">
      <a href="../data_lake_measure/" class="md-nav__link">
        Data lake measure
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../data_lake_series/" class="md-nav__link">
        Data lake series
      </a>
    </li>
  

    <li class="md-nav__item">
      <a href="../data_stream/" class="md-nav__link">
        Data stream
      </a>
    </li>
  

    <li class="md-nav__item md-nav__item--active">
      
      <input class="md-nav__toggle md-toggle" type="checkbox" id="__toc">
      
      
        <label class="md-nav__link md-nav__link--active" for="__toc">
          Function definition
          <span class="md-nav__icon md-icon"></span>
        </label>
      
      <a href="./" class="md-nav__link md-nav__link--active">
        Function definition
      </a>
      
        
<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
  
  
    <label class="md-nav__title" for="__toc">
      <span class="md-nav__icon md-icon"></span>
      Table of contents
    </label>
    <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
      
        <li class="md-nav__item">
  <a href="#streampipes.model.resource.function_definition" class="md-nav__link">
    streampipes.model.resource.function_definition
  </a>
  
</li>
      
        <li class="md-nav__item">
  <a href="#streampipes.model.resource.function_definition.FunctionDefinition" class="md-nav__link">
    FunctionDefinition
  </a>
  
    <nav class="md-nav" aria-label="FunctionDefinition">
      <ul class="md-nav__list">
        
          <li class="md-nav__item">
  <a href="#streampipes.model.resource.function_definition.FunctionDefinition.add_output_data_stream" class="md-nav__link">
    add_output_data_stream()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#streampipes.model.resource.function_definition.FunctionDefinition.convert_to_pandas_representation" class="md-nav__link">
    convert_to_pandas_representation()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#streampipes.model.resource.function_definition.FunctionDefinition.get_output_data_streams" class="md-nav__link">
    get_output_data_streams()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#streampipes.model.resource.function_definition.FunctionDefinition.get_output_stream_ids" class="md-nav__link">
    get_output_stream_ids()
  </a>
  
</li>
        
      </ul>
    </nav>
  
</li>
      
        <li class="md-nav__item">
  <a href="#streampipes.model.resource.function_definition.FunctionId" class="md-nav__link">
    FunctionId
  </a>
  
</li>
      
    </ul>
  
</nav>
      
    </li>
  

    <li class="md-nav__item">
      <a href="../resource/" class="md-nav__link">
        Resource
      </a>
    </li>
  

        </ul>
      </nav>
    </li>
  

        </ul>
      </nav>
    </li>
  

        </ul>
      </nav>
    </li>
  

  </ul>
</nav>
                  </div>
                </div>
              </div>
            
            
              <div class="md-sidebar md-sidebar--secondary" data-md-component="sidebar" data-md-type="toc" >
                <div class="md-sidebar__scrollwrap">
                  <div class="md-sidebar__inner">
                    

<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
  
  
    <label class="md-nav__title" for="__toc">
      <span class="md-nav__icon md-icon"></span>
      Table of contents
    </label>
    <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
      
        <li class="md-nav__item">
  <a href="#streampipes.model.resource.function_definition" class="md-nav__link">
    streampipes.model.resource.function_definition
  </a>
  
</li>
      
        <li class="md-nav__item">
  <a href="#streampipes.model.resource.function_definition.FunctionDefinition" class="md-nav__link">
    FunctionDefinition
  </a>
  
    <nav class="md-nav" aria-label="FunctionDefinition">
      <ul class="md-nav__list">
        
          <li class="md-nav__item">
  <a href="#streampipes.model.resource.function_definition.FunctionDefinition.add_output_data_stream" class="md-nav__link">
    add_output_data_stream()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#streampipes.model.resource.function_definition.FunctionDefinition.convert_to_pandas_representation" class="md-nav__link">
    convert_to_pandas_representation()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#streampipes.model.resource.function_definition.FunctionDefinition.get_output_data_streams" class="md-nav__link">
    get_output_data_streams()
  </a>
  
</li>
        
          <li class="md-nav__item">
  <a href="#streampipes.model.resource.function_definition.FunctionDefinition.get_output_stream_ids" class="md-nav__link">
    get_output_stream_ids()
  </a>
  
</li>
        
      </ul>
    </nav>
  
</li>
      
        <li class="md-nav__item">
  <a href="#streampipes.model.resource.function_definition.FunctionId" class="md-nav__link">
    FunctionId
  </a>
  
</li>
      
    </ul>
  
</nav>
                  </div>
                </div>
              </div>
            
          
            <div class="md-content" data-md-component="content">
              <article class="md-content__inner md-typeset">
                
                  
  <h1>Function definition</h1>

<div class="doc doc-object doc-module">


<a id="streampipes.model.resource.function_definition"></a>
  <div class="doc doc-contents first">

  
  <div class="doc doc-children">


<div class="doc doc-object doc-class">


<h2 id="streampipes.model.resource.function_definition.FunctionDefinition" class="doc doc-heading">
        <code>FunctionDefinition</code>


<a href="#streampipes.model.resource.function_definition.FunctionDefinition" class="headerlink" title="Permanent link">&para;</a></h2>


  <div class="doc doc-contents ">
      <p class="doc doc-class-bases">
        Bases: <code><a class="autorefs autorefs-internal" title="streampipes.model.resource.resource.Resource" href="../resource/#streampipes.model.resource.resource.Resource">Resource</a></code></p>

  
      <p>Configuration for a StreamPipes Function.</p>
<p>This class maps to the <code>FunctionDefinition</code> class in the StreamPipes model.
It contains all metadata that are required to register a function at the StreamPipes backend.</p>

  <table>
    <thead>
      <tr>
        <th><b>PARAMETER</b></th>
        <th><b>DESCRIPTION</b></th>
      </tr>
    </thead>
    <tbody>
        <tr>
          <td><code>consumed_streams</code></td>
          <td class="doc-param-details">
            <p>List of data streams the function is consuming from</p>
            <p>
            </p>
          </td>
        </tr>
        <tr>
          <td><code>function_id</code></td>
          <td class="doc-param-details">
            <p>identifier object of a StreamPipes function</p>
            <p>
            </p>
          </td>
        </tr>
    </tbody>
  </table>

  <table>
    <thead>
      <tr>
        <th><b>ATTRIBUTE</b></th>
        <th><b>DESCRIPTION</b></th>
      </tr>
    </thead>
    <tbody>
        <tr>
          <td><code>output_data_streams</code></td>
          <td class="doc-attribute-details">
            <p>Map off all output data streams added to the function definition</p>
            <p>
                <span class="doc-attribute-annotation">
                  <b>TYPE:</b>
                    <code><span title="typing.Dict">Dict</span>[str, <a class="autorefs autorefs-internal" title="streampipes.model.resource.data_stream.DataStream" href="../data_stream/#streampipes.model.resource.data_stream.DataStream">DataStream</a>]</code>
                </span>
            </p>
          </td>
        </tr>
    </tbody>
  </table>


  <div class="doc doc-children">


<div class="doc doc-object doc-function">


<h3 id="streampipes.model.resource.function_definition.FunctionDefinition.add_output_data_stream" class="doc doc-heading">
<code class="highlight language-python"><span class="n">add_output_data_stream</span><span class="p">(</span><span class="n">data_stream</span><span class="p">)</span></code>

<a href="#streampipes.model.resource.function_definition.FunctionDefinition.add_output_data_stream" class="headerlink" title="Permanent link">&para;</a></h3>


  <div class="doc doc-contents ">
  
      <p>Adds an output data stream to the function which makes it possible to write data back to StreamPipes.</p>

  <table>
    <thead>
      <tr>
        <th><b>PARAMETER</b></th>
        <th><b>DESCRIPTION</b></th>
      </tr>
    </thead>
    <tbody>
        <tr>
          <td><code>data_stream</code></td>
          <td class="doc-param-details">
            <p>The schema of the output data stream.</p>
            <p>
                <span class="doc-param-annotation">
                  <b>TYPE:</b>
                    <code><a class="autorefs autorefs-internal" title="streampipes.model.resource.data_stream.DataStream" href="../data_stream/#streampipes.model.resource.data_stream.DataStream">DataStream</a></code>
                </span>
            </p>
          </td>
        </tr>
    </tbody>
  </table>

  <table>
    <thead>
      <tr>
        <th><b>RETURNS</b></th>
        <th><b>DESCRIPTION</b></th>
      </tr>
    </thead>
    <tbody>
        <tr>
          <td>
              <code>self</code>
          </td>
          <td class="doc-returns-details">
            <p>Instance of the function definition that is extended by the provided <code>DataStream</code></p>
              <p>
                <span class="doc-returns-annotation">
                  <b>TYPE:</b>
                    <code><a class="autorefs autorefs-internal" title="streampipes.model.resource.function_definition.FunctionDefinition" href="#streampipes.model.resource.function_definition.FunctionDefinition">FunctionDefinition</a></code>
                </span>
              </p>
          </td>
        </tr>
    </tbody>
  </table>

  </div>

</div>

<div class="doc doc-object doc-function">


<h3 id="streampipes.model.resource.function_definition.FunctionDefinition.convert_to_pandas_representation" class="doc doc-heading">
<code class="highlight language-python"><span class="n">convert_to_pandas_representation</span><span class="p">()</span></code>

<a href="#streampipes.model.resource.function_definition.FunctionDefinition.convert_to_pandas_representation" class="headerlink" title="Permanent link">&para;</a></h3>


  <div class="doc doc-contents ">
  
      <p>Returns the dictionary representation of a function definition
to be used when creating a pandas Dataframe.</p>

  <table>
    <thead>
      <tr>
        <th><b>RETURNS</b></th>
        <th><b>DESCRIPTION</b></th>
      </tr>
    </thead>
    <tbody>
        <tr>
          <td>
              <code>pandas_repr</code>
          </td>
          <td class="doc-returns-details">
            <p>Pandas representation of the resource as a dictionary, which is then used by the respource container
to create a data frame from a collection of resources.</p>
              <p>
                <span class="doc-returns-annotation">
                  <b>TYPE:</b>
                    <code><span title="typing.Dict">Dict</span>[str, Any]</code>
                </span>
              </p>
          </td>
        </tr>
    </tbody>
  </table>

  </div>

</div>

<div class="doc doc-object doc-function">


<h3 id="streampipes.model.resource.function_definition.FunctionDefinition.get_output_data_streams" class="doc doc-heading">
<code class="highlight language-python"><span class="n">get_output_data_streams</span><span class="p">()</span></code>

<a href="#streampipes.model.resource.function_definition.FunctionDefinition.get_output_data_streams" class="headerlink" title="Permanent link">&para;</a></h3>


  <div class="doc doc-contents ">
  
      <p>Get the output data streams of the function.</p>

  <table>
    <thead>
      <tr>
        <th><b>RETURNS</b></th>
        <th><b>DESCRIPTION</b></th>
      </tr>
    </thead>
    <tbody>
        <tr>
          <td>
              <code>output_streams</code>
          </td>
          <td class="doc-returns-details">
            <p>Dictionary with every known stream id and the related output stream.</p>
              <p>
                <span class="doc-returns-annotation">
                  <b>TYPE:</b>
                    <code><span title="typing.Dict">Dict</span>[str, <a class="autorefs autorefs-internal" title="streampipes.model.resource.data_stream.DataStream" href="../data_stream/#streampipes.model.resource.data_stream.DataStream">DataStream</a>]</code>
                </span>
              </p>
          </td>
        </tr>
    </tbody>
  </table>

  </div>

</div>

<div class="doc doc-object doc-function">


<h3 id="streampipes.model.resource.function_definition.FunctionDefinition.get_output_stream_ids" class="doc doc-heading">
<code class="highlight language-python"><span class="n">get_output_stream_ids</span><span class="p">()</span></code>

<a href="#streampipes.model.resource.function_definition.FunctionDefinition.get_output_stream_ids" class="headerlink" title="Permanent link">&para;</a></h3>


  <div class="doc doc-contents ">
  
      <p>Get the stream ids of the output data streams.</p>

  <table>
    <thead>
      <tr>
        <th><b>RETURNS</b></th>
        <th><b>DESCRIPTION</b></th>
      </tr>
    </thead>
    <tbody>
        <tr>
          <td>
              <code>output_stream_ids</code>
          </td>
          <td class="doc-returns-details">
            <p>List of all stream ids</p>
              <p>
                <span class="doc-returns-annotation">
                  <b>TYPE:</b>
                    <code><span title="typing.List">List</span>[str]</code>
                </span>
              </p>
          </td>
        </tr>
    </tbody>
  </table>

  </div>

</div>


  </div>

  </div>

</div>

<div class="doc doc-object doc-class">


<h2 id="streampipes.model.resource.function_definition.FunctionId" class="doc doc-heading">
        <code>FunctionId</code>


<a href="#streampipes.model.resource.function_definition.FunctionId" class="headerlink" title="Permanent link">&para;</a></h2>


  <div class="doc doc-contents ">
      <p class="doc doc-class-bases">
        Bases: <code><a class="autorefs autorefs-internal" title="streampipes.model.common.BasicModel" href="../../common/#streampipes.model.common.BasicModel">BasicModel</a></code></p>

  
      <p>Identification object for a StreamPipes function.</p>
<p>Maps to the <code>FunctionId</code> class defined in the StreamPipes model.</p>

  <table>
    <thead>
      <tr>
        <th><b>PARAMETER</b></th>
        <th><b>DESCRIPTION</b></th>
      </tr>
    </thead>
    <tbody>
        <tr>
          <td><code>id</code></td>
          <td class="doc-param-details">
            <p>unique identifier of the function instance</p>
            <p>
            </p>
          </td>
        </tr>
        <tr>
          <td><code>version</code></td>
          <td class="doc-param-details">
            <p>version of the corresponding function</p>
            <p>
            </p>
          </td>
        </tr>
    </tbody>
  </table>


  <div class="doc doc-children">


  </div>

  </div>

</div>


  </div>

  </div>

</div>


              </article>
            </div>
          
          
        </div>
        
      </main>
      
<footer class="md-footer">
    <div class="md-footer-meta md-typeset">
        <div class="md-footer-meta__inner md-grid">
            <!-- Copyright and theme information -->
            <div class="md-footer-copyright">
                
                <div class="md-footer-copyright__highlight">
                    Apache License 2.0
                </div>
                
                powered by
                <a href="https://www.mkdocs.org" title="MkDocs">MkDocs</a>
                and
                <a href="https://squidfunk.github.io/mkdocs-material/"
                   title="Material for MkDocs">
                    Material for MkDocs</a>
            </div>
            
            <div class="md-social">
  
    
    <a href="https://github.com/apache/streampipes" target="_blank" rel="noopener" title="github.com" class="md-social__link">
      <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 480 512"><!--! Font Awesome Free 6.3.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2023 Fonticons, Inc.--><path d="M186.1 328.7c0 20.9-10.9 55.1-36.7 55.1s-36.7-34.2-36.7-55.1 10.9-55.1 36.7-55.1 36.7 34.2 36.7 55.1zM480 278.2c0 31.9-3.2 65.7-17.5 95-37.9 76.6-142.1 74.8-216.7 74.8-75.8 0-186.2 2.7-225.6-74.8-14.6-29-20.2-63.1-20.2-95 0-41.9 13.9-81.5 41.5-113.6-5.2-15.8-7.7-32.4-7.7-48.8 0-21.5 4.9-32.3 14.6-51.8 45.3 0 74.3 9 108.8 36 29-6.9 58.8-10 88.7-10 27 0 54.2 2.9 80.4 9.2 34-26.7 63-35.2 107.8-35.2 9.8 19.5 14.6 30.3 14.6 51.8 0 16.4-2.6 32.7-7.7 48.2 27.5 32.4 39 72.3 39 114.2zm-64.3 50.5c0-43.9-26.7-82.6-73.5-82.6-18.9 0-37 3.4-56 6-14.9 2.3-29.8 3.2-45.1 3.2-15.2 0-30.1-.9-45.1-3.2-18.7-2.6-37-6-56-6-46.8 0-73.5 38.7-73.5 82.6 0 87.8 80.4 101.3 150.4 101.3h48.2c70.3 0 150.6-13.4 150.6-101.3zm-82.6-55.1c-25.8 0-36.7 34.2-36.7 55.1s10.9 55.1 36.7 55.1 36.7-34.2 36.7-55.1-10.9-55.1-36.7-55.1z"/></svg>
    </a>
  
</div>
            
        </div>
    </div>
</footer>

    </div>
    <div class="md-dialog" data-md-component="dialog">
      <div class="md-dialog__inner md-typeset"></div>
    </div>
    
    <script id="__config" type="application/json">{"base": "../../../..", "features": ["navigation.tabs", "navigation.tabs.sticky", "navigation.instant", "navigation.indexes", "navigation.tracking"], "search": "../../../../assets/javascripts/workers/search.208ed371.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}, "version": {"provider": "mike"}}</script>
    
    
      <script src="../../../../assets/javascripts/bundle.efa0ade1.min.js"></script>
      
    
  </body>
</html>