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| <section id="introduction"> |
| <span id="guide"></span><h1>Introduction<a class="headerlink" href="#introduction" title="Link to this heading">¶</a></h1> |
| <p>Welcome to the User Guide for the Python bindings of Arrow DataFusion. This guide aims to provide an introduction to |
| DataFusion through various examples and highlight the most effective ways of using it.</p> |
| <section id="installation"> |
| <h2>Installation<a class="headerlink" href="#installation" title="Link to this heading">¶</a></h2> |
| <p>DataFusion is a Python library and, as such, can be installed via pip from <a class="reference external" href="https://pypi.org/project/datafusion">PyPI</a>.</p> |
| <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>pip<span class="w"> </span>install<span class="w"> </span>datafusion |
| </pre></div> |
| </div> |
| <p>You can verify the installation by running:</p> |
| <div class="highlight-ipython notranslate"><div class="highlight"><pre><span></span><span class="n">In</span> <span class="p">[</span><span class="mi">1</span><span class="p">]:</span> <span class="kn">import</span><span class="w"> </span><span class="nn">datafusion</span> |
| |
| <span class="n">In</span> <span class="p">[</span><span class="mi">2</span><span class="p">]:</span> <span class="n">datafusion</span><span class="o">.</span><span class="n">__version__</span> |
| <span class="n">Out</span><span class="p">[</span><span class="mi">2</span><span class="p">]:</span> <span class="s1">'50.1.0'</span> |
| </pre></div> |
| </div> |
| <p>In this documentation we will also show some examples for how DataFusion integrates |
| with Jupyter notebooks. To install and start a Jupyter labs session use</p> |
| <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>pip<span class="w"> </span>install<span class="w"> </span>jupyterlab |
| jupyter<span class="w"> </span>lab |
| </pre></div> |
| </div> |
| <p>To demonstrate working with DataFusion, we need a data source. Later in the tutorial we will show |
| options for data sources. For our first example, we demonstrate using a Pokemon dataset that you |
| can download |
| <a class="reference external" href="https://gist.githubusercontent.com/ritchie46/cac6b337ea52281aa23c049250a4ff03/raw/89a957ff3919d90e6ef2d34235e6bf22304f3366/pokemon.csv">here</a>.</p> |
| <p>With that file in place you can use the following python example to view the DataFrame in |
| DataFusion.</p> |
| <div class="highlight-ipython notranslate"><div class="highlight"><pre><span></span><span class="n">In</span> <span class="p">[</span><span class="mi">3</span><span class="p">]:</span> <span class="kn">from</span><span class="w"> </span><span class="nn">datafusion</span><span class="w"> </span><span class="kn">import</span> <span class="n">SessionContext</span> |
| |
| <span class="n">In</span> <span class="p">[</span><span class="mi">4</span><span class="p">]:</span> <span class="n">ctx</span> <span class="o">=</span> <span class="n">SessionContext</span><span class="p">()</span> |
| |
| <span class="n">In</span> <span class="p">[</span><span class="mi">5</span><span class="p">]:</span> <span class="n">df</span> <span class="o">=</span> <span class="n">ctx</span><span class="o">.</span><span class="n">read_csv</span><span class="p">(</span><span class="s2">"pokemon.csv"</span><span class="p">)</span> |
| |
| <span class="n">In</span> <span class="p">[</span><span class="mi">6</span><span class="p">]:</span> <span class="n">df</span><span class="o">.</span><span class="n">show</span><span class="p">()</span> |
| <span class="n">DataFrame</span><span class="p">()</span> |
| <span class="o">+----+---------------------------+--------+--------+-------+----+--------+---------+---------+---------+-------+------------+-----------+</span> |
| <span class="o">|</span> <span class="c1"># | Name | Type 1 | Type 2 | Total | HP | Attack | Defense | Sp. Atk | Sp. Def | Speed | Generation | Legendary |</span> |
| <span class="o">+----+---------------------------+--------+--------+-------+----+--------+---------+---------+---------+-------+------------+-----------+</span> |
| <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">Bulbasaur</span> <span class="o">|</span> <span class="n">Grass</span> <span class="o">|</span> <span class="n">Poison</span> <span class="o">|</span> <span class="mi">318</span> <span class="o">|</span> <span class="mi">45</span> <span class="o">|</span> <span class="mi">49</span> <span class="o">|</span> <span class="mi">49</span> <span class="o">|</span> <span class="mi">65</span> <span class="o">|</span> <span class="mi">65</span> <span class="o">|</span> <span class="mi">45</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">2</span> <span class="o">|</span> <span class="n">Ivysaur</span> <span class="o">|</span> <span class="n">Grass</span> <span class="o">|</span> <span class="n">Poison</span> <span class="o">|</span> <span class="mi">405</span> <span class="o">|</span> <span class="mi">60</span> <span class="o">|</span> <span class="mi">62</span> <span class="o">|</span> <span class="mi">63</span> <span class="o">|</span> <span class="mi">80</span> <span class="o">|</span> <span class="mi">80</span> <span class="o">|</span> <span class="mi">60</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">3</span> <span class="o">|</span> <span class="n">Venusaur</span> <span class="o">|</span> <span class="n">Grass</span> <span class="o">|</span> <span class="n">Poison</span> <span class="o">|</span> <span class="mi">525</span> <span class="o">|</span> <span class="mi">80</span> <span class="o">|</span> <span class="mi">82</span> <span class="o">|</span> <span class="mi">83</span> <span class="o">|</span> <span class="mi">100</span> <span class="o">|</span> <span class="mi">100</span> <span class="o">|</span> <span class="mi">80</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">3</span> <span class="o">|</span> <span class="n">VenusaurMega</span> <span class="n">Venusaur</span> <span class="o">|</span> <span class="n">Grass</span> <span class="o">|</span> <span class="n">Poison</span> <span class="o">|</span> <span class="mi">625</span> <span class="o">|</span> <span class="mi">80</span> <span class="o">|</span> <span class="mi">100</span> <span class="o">|</span> <span class="mi">123</span> <span class="o">|</span> <span class="mi">122</span> <span class="o">|</span> <span class="mi">120</span> <span class="o">|</span> <span class="mi">80</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">4</span> <span class="o">|</span> <span class="n">Charmander</span> <span class="o">|</span> <span class="n">Fire</span> <span class="o">|</span> <span class="o">|</span> <span class="mi">309</span> <span class="o">|</span> <span class="mi">39</span> <span class="o">|</span> <span class="mi">52</span> <span class="o">|</span> <span class="mi">43</span> <span class="o">|</span> <span class="mi">60</span> <span class="o">|</span> <span class="mi">50</span> <span class="o">|</span> <span class="mi">65</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">5</span> <span class="o">|</span> <span class="n">Charmeleon</span> <span class="o">|</span> <span class="n">Fire</span> <span class="o">|</span> <span class="o">|</span> <span class="mi">405</span> <span class="o">|</span> <span class="mi">58</span> <span class="o">|</span> <span class="mi">64</span> <span class="o">|</span> <span class="mi">58</span> <span class="o">|</span> <span class="mi">80</span> <span class="o">|</span> <span class="mi">65</span> <span class="o">|</span> <span class="mi">80</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">6</span> <span class="o">|</span> <span class="n">Charizard</span> <span class="o">|</span> <span class="n">Fire</span> <span class="o">|</span> <span class="n">Flying</span> <span class="o">|</span> <span class="mi">534</span> <span class="o">|</span> <span class="mi">78</span> <span class="o">|</span> <span class="mi">84</span> <span class="o">|</span> <span class="mi">78</span> <span class="o">|</span> <span class="mi">109</span> <span class="o">|</span> <span class="mi">85</span> <span class="o">|</span> <span class="mi">100</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">6</span> <span class="o">|</span> <span class="n">CharizardMega</span> <span class="n">Charizard</span> <span class="n">X</span> <span class="o">|</span> <span class="n">Fire</span> <span class="o">|</span> <span class="n">Dragon</span> <span class="o">|</span> <span class="mi">634</span> <span class="o">|</span> <span class="mi">78</span> <span class="o">|</span> <span class="mi">130</span> <span class="o">|</span> <span class="mi">111</span> <span class="o">|</span> <span class="mi">130</span> <span class="o">|</span> <span class="mi">85</span> <span class="o">|</span> <span class="mi">100</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">6</span> <span class="o">|</span> <span class="n">CharizardMega</span> <span class="n">Charizard</span> <span class="n">Y</span> <span class="o">|</span> <span class="n">Fire</span> <span class="o">|</span> <span class="n">Flying</span> <span class="o">|</span> <span class="mi">634</span> <span class="o">|</span> <span class="mi">78</span> <span class="o">|</span> <span class="mi">104</span> <span class="o">|</span> <span class="mi">78</span> <span class="o">|</span> <span class="mi">159</span> <span class="o">|</span> <span class="mi">115</span> <span class="o">|</span> <span class="mi">100</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">7</span> <span class="o">|</span> <span class="n">Squirtle</span> <span class="o">|</span> <span class="n">Water</span> <span class="o">|</span> <span class="o">|</span> <span class="mi">314</span> <span class="o">|</span> <span class="mi">44</span> <span class="o">|</span> <span class="mi">48</span> <span class="o">|</span> <span class="mi">65</span> <span class="o">|</span> <span class="mi">50</span> <span class="o">|</span> <span class="mi">64</span> <span class="o">|</span> <span class="mi">43</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">8</span> <span class="o">|</span> <span class="n">Wartortle</span> <span class="o">|</span> <span class="n">Water</span> <span class="o">|</span> <span class="o">|</span> <span class="mi">405</span> <span class="o">|</span> <span class="mi">59</span> <span class="o">|</span> <span class="mi">63</span> <span class="o">|</span> <span class="mi">80</span> <span class="o">|</span> <span class="mi">65</span> <span class="o">|</span> <span class="mi">80</span> <span class="o">|</span> <span class="mi">58</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">9</span> <span class="o">|</span> <span class="n">Blastoise</span> <span class="o">|</span> <span class="n">Water</span> <span class="o">|</span> <span class="o">|</span> <span class="mi">530</span> <span class="o">|</span> <span class="mi">79</span> <span class="o">|</span> <span class="mi">83</span> <span class="o">|</span> <span class="mi">100</span> <span class="o">|</span> <span class="mi">85</span> <span class="o">|</span> <span class="mi">105</span> <span class="o">|</span> <span class="mi">78</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">9</span> <span class="o">|</span> <span class="n">BlastoiseMega</span> <span class="n">Blastoise</span> <span class="o">|</span> <span class="n">Water</span> <span class="o">|</span> <span class="o">|</span> <span class="mi">630</span> <span class="o">|</span> <span class="mi">79</span> <span class="o">|</span> <span class="mi">103</span> <span class="o">|</span> <span class="mi">120</span> <span class="o">|</span> <span class="mi">135</span> <span class="o">|</span> <span class="mi">115</span> <span class="o">|</span> <span class="mi">78</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">10</span> <span class="o">|</span> <span class="n">Caterpie</span> <span class="o">|</span> <span class="n">Bug</span> <span class="o">|</span> <span class="o">|</span> <span class="mi">195</span> <span class="o">|</span> <span class="mi">45</span> <span class="o">|</span> <span class="mi">30</span> <span class="o">|</span> <span class="mi">35</span> <span class="o">|</span> <span class="mi">20</span> <span class="o">|</span> <span class="mi">20</span> <span class="o">|</span> <span class="mi">45</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">11</span> <span class="o">|</span> <span class="n">Metapod</span> <span class="o">|</span> <span class="n">Bug</span> <span class="o">|</span> <span class="o">|</span> <span class="mi">205</span> <span class="o">|</span> <span class="mi">50</span> <span class="o">|</span> <span class="mi">20</span> <span class="o">|</span> <span class="mi">55</span> <span class="o">|</span> <span class="mi">25</span> <span class="o">|</span> <span class="mi">25</span> <span class="o">|</span> <span class="mi">30</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">12</span> <span class="o">|</span> <span class="n">Butterfree</span> <span class="o">|</span> <span class="n">Bug</span> <span class="o">|</span> <span class="n">Flying</span> <span class="o">|</span> <span class="mi">395</span> <span class="o">|</span> <span class="mi">60</span> <span class="o">|</span> <span class="mi">45</span> <span class="o">|</span> <span class="mi">50</span> <span class="o">|</span> <span class="mi">90</span> <span class="o">|</span> <span class="mi">80</span> <span class="o">|</span> <span class="mi">70</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">13</span> <span class="o">|</span> <span class="n">Weedle</span> <span class="o">|</span> <span class="n">Bug</span> <span class="o">|</span> <span class="n">Poison</span> <span class="o">|</span> <span class="mi">195</span> <span class="o">|</span> <span class="mi">40</span> <span class="o">|</span> <span class="mi">35</span> <span class="o">|</span> <span class="mi">30</span> <span class="o">|</span> <span class="mi">20</span> <span class="o">|</span> <span class="mi">20</span> <span class="o">|</span> <span class="mi">50</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">14</span> <span class="o">|</span> <span class="n">Kakuna</span> <span class="o">|</span> <span class="n">Bug</span> <span class="o">|</span> <span class="n">Poison</span> <span class="o">|</span> <span class="mi">205</span> <span class="o">|</span> <span class="mi">45</span> <span class="o">|</span> <span class="mi">25</span> <span class="o">|</span> <span class="mi">50</span> <span class="o">|</span> <span class="mi">25</span> <span class="o">|</span> <span class="mi">25</span> <span class="o">|</span> <span class="mi">35</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">15</span> <span class="o">|</span> <span class="n">Beedrill</span> <span class="o">|</span> <span class="n">Bug</span> <span class="o">|</span> <span class="n">Poison</span> <span class="o">|</span> <span class="mi">395</span> <span class="o">|</span> <span class="mi">65</span> <span class="o">|</span> <span class="mi">90</span> <span class="o">|</span> <span class="mi">40</span> <span class="o">|</span> <span class="mi">45</span> <span class="o">|</span> <span class="mi">80</span> <span class="o">|</span> <span class="mi">75</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">|</span> <span class="mi">15</span> <span class="o">|</span> <span class="n">BeedrillMega</span> <span class="n">Beedrill</span> <span class="o">|</span> <span class="n">Bug</span> <span class="o">|</span> <span class="n">Poison</span> <span class="o">|</span> <span class="mi">495</span> <span class="o">|</span> <span class="mi">65</span> <span class="o">|</span> <span class="mi">150</span> <span class="o">|</span> <span class="mi">40</span> <span class="o">|</span> <span class="mi">15</span> <span class="o">|</span> <span class="mi">80</span> <span class="o">|</span> <span class="mi">145</span> <span class="o">|</span> <span class="mi">1</span> <span class="o">|</span> <span class="n">false</span> <span class="o">|</span> |
| <span class="o">+----+---------------------------+--------+--------+-------+----+--------+---------+---------+---------+-------+------------+-----------+</span> |
| </pre></div> |
| </div> |
| <p>If you are working in a Jupyter notebook, you can also use the following to give you a table |
| display that may be easier to read.</p> |
| <div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>display<span class="o">(</span>df<span class="o">)</span> |
| </pre></div> |
| </div> |
| <a class="reference internal image-reference" href="../_images/jupyter_lab_df_view.png"><img alt="Rendered table showing Pokemon DataFrame" src="../_images/jupyter_lab_df_view.png" style="width: 800px;" /> |
| </a> |
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