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| gitHub |
| <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav> <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>IoTDB User Guide (In progress)</span> <!----></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>IoTDB Introduction</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Quick Start</span> <span 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class="sidebar-link">JDBC</a></li><li><a href="/UserGuide/Master/API/Programming-Java-Native-API.html" class="sidebar-link">Java Native API</a></li><li><a href="/UserGuide/Master/API/Programming-Python-Native-API.html" aria-current="page" class="active sidebar-link">Python Native API</a></li><li><a href="/UserGuide/Master/API/Programming-Cpp-Native-API.html" class="sidebar-link">C++ Native API</a></li><li><a href="/UserGuide/Master/API/Programming-Go-Native-API.html" class="sidebar-link">Go Native API</a></li><li><a href="/UserGuide/Master/API/Programming-TsFile-API.html" class="sidebar-link">TsFile API</a></li></ul></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Advanced Features</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Communication Service Protocol</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>System Tools</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Collaboration of Edge and Cloud</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Ecosystem Integration</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Cluster Setup</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>FAQ</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Appendix</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Comparison with TSDBs</span> <span class="arrow right"></span></p> <!----></section></li></ul> </aside> <main class="page"> <div class="content content__default"><h2 id="python-native-api"><a href="#python-native-api" class="header-anchor">#</a> Python Native API</h2> <h3 id="requirements"><a href="#requirements" class="header-anchor">#</a> Requirements</h3> <p>You have to install thrift (>=0.13) before using the package.</p> <h3 id="how-to-use-example"><a href="#how-to-use-example" class="header-anchor">#</a> How to use (Example)</h3> <p>First, download the package: <code>pip3 install apache-iotdb</code></p> <p>You can get an example of using the package to read and write data at here: <a href="https://github.com/apache/iotdb/blob/master/client-py/SessionExample.py" target="_blank" rel="noopener noreferrer">Example<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></p> <p>(you need to add <code>import iotdb</code> in the head of the file)</p> <p>Or:</p> <div class="language-python line-numbers-mode"><pre class="language-python"><code><span class="token keyword">from</span> iotdb<span class="token punctuation">.</span>Session <span class="token keyword">import</span> Session |
| |
| ip <span class="token operator">=</span> <span class="token string">"127.0.0.1"</span> |
| port_ <span class="token operator">=</span> <span class="token string">"6667"</span> |
| username_ <span class="token operator">=</span> <span class="token string">'root'</span> |
| password_ <span class="token operator">=</span> <span class="token string">'root'</span> |
| session <span class="token operator">=</span> Session<span class="token punctuation">(</span>ip<span class="token punctuation">,</span> port_<span class="token punctuation">,</span> username_<span class="token punctuation">,</span> password_<span class="token punctuation">)</span> |
| session<span class="token punctuation">.</span><span class="token builtin">open</span><span class="token punctuation">(</span><span class="token boolean">False</span><span class="token punctuation">)</span> |
| zone <span class="token operator">=</span> session<span class="token punctuation">.</span>get_time_zone<span class="token punctuation">(</span><span class="token punctuation">)</span> |
| session<span class="token punctuation">.</span>close<span class="token punctuation">(</span><span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br></div></div><h3 id="iotdb-testcontainer"><a href="#iotdb-testcontainer" class="header-anchor">#</a> IoTDB Testcontainer</h3> <p>The Test Support is based on the lib <code>testcontainers</code> (https://testcontainers-python.readthedocs.io/en/latest/index.html) which you need to install in your project if you want to use the feature.</p> <p>To start (and stop) an IoTDB Database in a Docker container simply do:</p> <div class="language-python line-numbers-mode"><pre class="language-python"><code><span class="token keyword">class</span> <span class="token class-name">MyTestCase</span><span class="token punctuation">(</span>unittest<span class="token punctuation">.</span>TestCase<span class="token punctuation">)</span><span class="token punctuation">:</span> |
| |
| <span class="token keyword">def</span> <span class="token function">test_something</span><span class="token punctuation">(</span>self<span class="token punctuation">)</span><span class="token punctuation">:</span> |
| <span class="token keyword">with</span> IoTDBContainer<span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">as</span> c<span class="token punctuation">:</span> |
| session <span class="token operator">=</span> Session<span class="token punctuation">(</span><span class="token string">'localhost'</span><span class="token punctuation">,</span> c<span class="token punctuation">.</span>get_exposed_port<span class="token punctuation">(</span><span class="token number">6667</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token string">'root'</span><span class="token punctuation">,</span> <span class="token string">'root'</span><span class="token punctuation">)</span> |
| session<span class="token punctuation">.</span><span class="token builtin">open</span><span class="token punctuation">(</span><span class="token boolean">False</span><span class="token punctuation">)</span> |
| result <span class="token operator">=</span> session<span class="token punctuation">.</span>execute_query_statement<span class="token punctuation">(</span><span class="token string">"SHOW TIMESERIES"</span><span class="token punctuation">)</span> |
| <span class="token keyword">print</span><span class="token punctuation">(</span>result<span class="token punctuation">)</span> |
| session<span class="token punctuation">.</span>close<span class="token punctuation">(</span><span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br></div></div><p>by default it will load the image <code>apache/iotdb:latest</code>, if you want a specific version just pass it like e.g. <code>IoTDBContainer("apache/iotdb:0.12.0")</code> to get version <code>0.12.0</code> running.</p> <h3 id="pandas-support"><a href="#pandas-support" class="header-anchor">#</a> Pandas Support</h3> <p>To easily transform a query result to a <a href="https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.html" target="_blank" rel="noopener noreferrer">Pandas Dataframe<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a> |
| the SessionDataSet has a method <code>.todf()</code> which consumes the dataset and transforms it to a pandas dataframe.</p> <p>Example:</p> <div class="language-python line-numbers-mode"><pre class="language-python"><code><span class="token keyword">from</span> iotdb<span class="token punctuation">.</span>Session <span class="token keyword">import</span> Session |
| |
| ip <span class="token operator">=</span> <span class="token string">"127.0.0.1"</span> |
| port_ <span class="token operator">=</span> <span class="token string">"6667"</span> |
| username_ <span class="token operator">=</span> <span class="token string">'root'</span> |
| password_ <span class="token operator">=</span> <span class="token string">'root'</span> |
| session <span class="token operator">=</span> Session<span class="token punctuation">(</span>ip<span class="token punctuation">,</span> port_<span class="token punctuation">,</span> username_<span class="token punctuation">,</span> password_<span class="token punctuation">)</span> |
| session<span class="token punctuation">.</span><span class="token builtin">open</span><span class="token punctuation">(</span><span class="token boolean">False</span><span class="token punctuation">)</span> |
| result <span class="token operator">=</span> session<span class="token punctuation">.</span>execute_query_statement<span class="token punctuation">(</span><span class="token string">"SELECT * FROM root.*"</span><span class="token punctuation">)</span> |
| |
| <span class="token comment"># Transform to Pandas Dataset</span> |
| df <span class="token operator">=</span> result<span class="token punctuation">.</span>todf<span class="token punctuation">(</span><span class="token punctuation">)</span> |
| |
| session<span class="token punctuation">.</span>close<span class="token punctuation">(</span><span class="token punctuation">)</span> |
| |
| <span class="token comment"># Now you can work with the dataframe</span> |
| df <span class="token operator">=</span> <span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br></div></div><h3 id="developers"><a href="#developers" class="header-anchor">#</a> Developers</h3> <h4 id="introduction"><a href="#introduction" class="header-anchor">#</a> Introduction</h4> <p>This is an example of how to connect to IoTDB with python, using the thrift rpc interfaces. Things are almost the same on Windows or Linux, but pay attention to the difference like path separator.</p> <h4 id="prerequisites"><a href="#prerequisites" class="header-anchor">#</a> Prerequisites</h4> <p>Python3.7 or later is preferred.</p> <p>You have to install Thrift (0.11.0 or later) to compile our thrift file into python code. Below is the official tutorial of installation, eventually, you should have a thrift executable.</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>http://thrift.apache.org/docs/install/ |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>Before starting you need to install <code>requirements_dev.txt</code> in your python environment, e.g. by calling</p> <div class="language-shell line-numbers-mode"><pre class="language-shell"><code>pip <span class="token function">install</span> -r requirements_dev.txt |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><h4 id="compile-the-thrift-library-and-debug"><a href="#compile-the-thrift-library-and-debug" class="header-anchor">#</a> Compile the thrift library and Debug</h4> <p>In the root of IoTDB's source code folder, run <code>mvn clean generate-sources -pl client-py -am</code>.</p> <p>This will automatically delete and repopulate the folder <code>iotdb/thrift</code> with the generated thrift files. |
| This folder is ignored from git and should <strong>never be pushed to git!</strong></p> <p><strong>Notice</strong> Do not upload <code>iotdb/thrift</code> to the git repo.</p> <h4 id="session-client-example"><a href="#session-client-example" class="header-anchor">#</a> Session Client & Example</h4> <p>We packed up the Thrift interface in <code>client-py/src/iotdb/Session.py</code> (similar with its Java counterpart), also provided an example file <code>client-py/src/SessionExample.py</code> of how to use the session module. please read it carefully.</p> <p>Or, another simple example:</p> <div class="language-python line-numbers-mode"><pre class="language-python"><code><span class="token keyword">from</span> iotdb<span class="token punctuation">.</span>Session <span class="token keyword">import</span> Session |
| |
| ip <span class="token operator">=</span> <span class="token string">"127.0.0.1"</span> |
| port_ <span class="token operator">=</span> <span class="token string">"6667"</span> |
| username_ <span class="token operator">=</span> <span class="token string">'root'</span> |
| password_ <span class="token operator">=</span> <span class="token string">'root'</span> |
| session <span class="token operator">=</span> Session<span class="token punctuation">(</span>ip<span class="token punctuation">,</span> port_<span class="token punctuation">,</span> username_<span class="token punctuation">,</span> password_<span class="token punctuation">)</span> |
| session<span class="token punctuation">.</span><span class="token builtin">open</span><span class="token punctuation">(</span><span class="token boolean">False</span><span class="token punctuation">)</span> |
| zone <span class="token operator">=</span> session<span class="token punctuation">.</span>get_time_zone<span class="token punctuation">(</span><span class="token punctuation">)</span> |
| session<span class="token punctuation">.</span>close<span class="token punctuation">(</span><span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br></div></div><h4 id="tests"><a href="#tests" class="header-anchor">#</a> Tests</h4> <p>Please add your custom tests in <code>tests</code> folder.</p> <p>To run all defined tests just type <code>pytest .</code> in the root folder.</p> <p><strong>Notice</strong> Some tests need docker to be started on your system as a test instance is started in a docker container using <a href="https://testcontainers-python.readthedocs.io/en/latest/index.html" target="_blank" rel="noopener noreferrer">testcontainers<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a>.</p> <h4 id="futher-tools"><a href="#futher-tools" class="header-anchor">#</a> Futher Tools</h4> <p><a href="https://pypi.org/project/black/" target="_blank" rel="noopener noreferrer">black<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a> and <a href="https://pypi.org/project/flake8/" target="_blank" rel="noopener noreferrer">flake8<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a> are installed for autoformatting and linting. |
| Both can be run by <code>black .</code> or <code>flake8 .</code> respectively.</p> <h3 id="releasing"><a href="#releasing" class="header-anchor">#</a> Releasing</h3> <p>To do a release just ensure that you have the right set of generated thrift files. |
| Then run linting and auto-formatting. |
| Then, ensure that all tests work (via <code>pytest .</code>). |
| Then you are good to go to do a release!</p> <h4 id="preparing-your-environment"><a href="#preparing-your-environment" class="header-anchor">#</a> Preparing your environment</h4> <p>First, install all necessary dev dependencies via <code>pip install -r requirements_dev.txt</code>.</p> <h4 id="doing-the-release"><a href="#doing-the-release" class="header-anchor">#</a> Doing the Release</h4> <p>There is a convenient script <code>release.sh</code> to do all steps for a release. |
| Namely, these are</p> <ul><li>Remove all transient directories from last release (if exists)</li> <li>(Re-)generate all generated sources via mvn</li> <li>Run Linting (flake8)</li> <li>Run Tests via pytest</li> <li>Build</li> <li>Release to pypi</li></ul></div> <div class="page-nav"><p class="inner"><span class="prev"> |
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| Apache and the Apache feather logo are trademarks of The Apache Software Foundation</p> <p style="text-align: center; margin-top: 10px; color: #444"> |
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