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130 lines
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<h1>Source code for pyFTS.data.common</h1><div class="highlight"><pre>
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<span></span>
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<span class="kn">import</span> <span class="nn">pandas</span> <span class="k">as</span> <span class="nn">pd</span>
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<span class="kn">import</span> <span class="nn">numpy</span> <span class="k">as</span> <span class="nn">np</span>
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<span class="kn">import</span> <span class="nn">os</span>
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<span class="kn">import</span> <span class="nn">pkg_resources</span>
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<span class="kn">from</span> <span class="nn">pathlib</span> <span class="k">import</span> <span class="n">Path</span>
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<span class="kn">from</span> <span class="nn">urllib</span> <span class="k">import</span> <span class="n">request</span>
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<div class="viewcode-block" id="get_dataframe"><a class="viewcode-back" href="../../../pyFTS.data.html#pyFTS.data.common.get_dataframe">[docs]</a><span class="k">def</span> <span class="nf">get_dataframe</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">sep</span><span class="o">=</span><span class="s2">";"</span><span class="p">,</span> <span class="n">compression</span><span class="o">=</span><span class="s1">'infer'</span><span class="p">):</span>
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<span class="sd">"""</span>
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<span class="sd"> This method check if filename already exists, read the file and return its data.</span>
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<span class="sd"> If the file don't already exists, it will be downloaded and decompressed.</span>
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<span class="sd"> :param filename: dataset local filename</span>
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<span class="sd"> :param url: dataset internet URL</span>
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<span class="sd"> :param sep: CSV field separator</span>
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<span class="sd"> :param compression: type of compression</span>
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<span class="sd"> :return: Pandas dataset</span>
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<span class="sd"> """</span>
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<span class="n">tmp_file</span> <span class="o">=</span> <span class="n">Path</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span>
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<span class="k">if</span> <span class="n">tmp_file</span><span class="o">.</span><span class="n">is_file</span><span class="p">():</span>
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<span class="k">return</span> <span class="n">pd</span><span class="o">.</span><span class="n">read_csv</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="n">sep</span><span class="o">=</span><span class="n">sep</span><span class="p">,</span> <span class="n">compression</span><span class="o">=</span><span class="n">compression</span><span class="p">)</span>
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<span class="k">else</span><span class="p">:</span>
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<span class="n">request</span><span class="o">.</span><span class="n">urlretrieve</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">filename</span><span class="p">)</span>
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<span class="k">return</span> <span class="n">pd</span><span class="o">.</span><span class="n">read_csv</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="n">sep</span><span class="o">=</span><span class="n">sep</span><span class="p">,</span> <span class="n">compression</span><span class="o">=</span><span class="n">compression</span><span class="p">)</span></div>
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</pre></div>
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