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| <h1>Source code for apache_beam.dataframe.pandas_top_level_functions</h1><div class="highlight"><pre> |
| <span></span><span class="c1">#</span> |
| <span class="c1"># Licensed to the Apache Software Foundation (ASF) under one or more</span> |
| <span class="c1"># contributor license agreements. See the NOTICE file distributed with</span> |
| <span class="c1"># this work for additional information regarding copyright ownership.</span> |
| <span class="c1"># The ASF licenses this file to You under the Apache License, Version 2.0</span> |
| <span class="c1"># (the "License"); you may not use this file except in compliance with</span> |
| <span class="c1"># the License. You may obtain a copy of the License at</span> |
| <span class="c1">#</span> |
| <span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="c1">#</span> |
| <span class="c1"># Unless required by applicable law or agreed to in writing, software</span> |
| <span class="c1"># distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="c1"># WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="c1"># See the License for the specific language governing permissions and</span> |
| <span class="c1"># limitations under the License.</span> |
| |
| <span class="sd">"""A module providing various functionality from the top-level pandas namespace.</span> |
| <span class="sd">"""</span> |
| |
| <span class="kn">import</span> <span class="nn">re</span> |
| <span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Mapping</span> |
| |
| <span class="kn">import</span> <span class="nn">pandas</span> <span class="k">as</span> <span class="nn">pd</span> |
| |
| <span class="kn">from</span> <span class="nn">apache_beam.dataframe</span> <span class="kn">import</span> <span class="n">expressions</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.dataframe</span> <span class="kn">import</span> <span class="n">frame_base</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.dataframe</span> <span class="kn">import</span> <span class="n">partitionings</span> |
| |
| |
| <span class="k">def</span> <span class="nf">_call_on_first_arg</span><span class="p">(</span><span class="n">name</span><span class="p">):</span> |
| <span class="k">def</span> <span class="nf">wrapper</span><span class="p">(</span><span class="n">target</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">target</span><span class="p">,</span> <span class="n">frame_base</span><span class="o">.</span><span class="n">DeferredBase</span><span class="p">):</span> |
| <span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">target</span><span class="p">,</span> <span class="n">name</span><span class="p">)(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">pd</span><span class="p">,</span> <span class="n">name</span><span class="p">)(</span><span class="n">target</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="nb">staticmethod</span><span class="p">(</span><span class="n">wrapper</span><span class="p">)</span> |
| |
| |
| <span class="k">def</span> <span class="nf">_maybe_wrap_constant_expr</span><span class="p">(</span><span class="n">res</span><span class="p">):</span> |
| <span class="k">if</span> <span class="nb">type</span><span class="p">(</span><span class="n">res</span><span class="p">)</span> <span class="ow">in</span> <span class="n">frame_base</span><span class="o">.</span><span class="n">DeferredBase</span><span class="o">.</span><span class="n">_pandas_type_map</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">frame_base</span><span class="o">.</span><span class="n">DeferredBase</span><span class="o">.</span><span class="n">wrap</span><span class="p">(</span> |
| <span class="n">expressions</span><span class="o">.</span><span class="n">ConstantExpression</span><span class="p">(</span><span class="n">res</span><span class="p">,</span> <span class="n">res</span><span class="p">[</span><span class="mi">0</span><span class="p">:</span><span class="mi">0</span><span class="p">]))</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">res</span> |
| |
| |
| <span class="k">def</span> <span class="nf">_defer_to_pandas</span><span class="p">(</span><span class="n">name</span><span class="p">):</span> |
| <span class="n">func</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">pd</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">wrapper</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="n">res</span> <span class="o">=</span> <span class="n">func</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">_maybe_wrap_constant_expr</span><span class="p">(</span><span class="n">res</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="nb">staticmethod</span><span class="p">(</span><span class="n">wrapper</span><span class="p">)</span> |
| |
| |
| <span class="k">def</span> <span class="nf">_defer_to_pandas_maybe_elementwise</span><span class="p">(</span><span class="n">name</span><span class="p">):</span> |
| <span class="w"> </span><span class="sd">""" Same as _defer_to_pandas, except it handles DeferredBase args, assuming</span> |
| <span class="sd"> the function can be processed elementwise. """</span> |
| <span class="n">func</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">pd</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="nf">wrapper</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="k">if</span> <span class="nb">any</span><span class="p">(</span><span class="nb">isinstance</span><span class="p">(</span><span class="n">arg</span><span class="p">,</span> <span class="n">frame_base</span><span class="o">.</span><span class="n">DeferredBase</span><span class="p">)</span> |
| <span class="k">for</span> <span class="n">arg</span> <span class="ow">in</span> <span class="n">args</span> <span class="o">+</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">kwargs</span><span class="o">.</span><span class="n">values</span><span class="p">())):</span> |
| <span class="k">return</span> <span class="n">frame_base</span><span class="o">.</span><span class="n">_elementwise_function</span><span class="p">(</span><span class="n">func</span><span class="p">,</span> <span class="n">name</span><span class="p">)(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| |
| <span class="n">res</span> <span class="o">=</span> <span class="n">func</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> |
| <span class="k">return</span> <span class="n">_maybe_wrap_constant_expr</span><span class="p">(</span><span class="n">res</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="nb">staticmethod</span><span class="p">(</span><span class="n">wrapper</span><span class="p">)</span> |
| |
| |
| <span class="k">def</span> <span class="nf">_is_top_level_function</span><span class="p">(</span><span class="n">o</span><span class="p">):</span> |
| <span class="k">return</span> <span class="p">(</span> |
| <span class="nb">callable</span><span class="p">(</span><span class="n">o</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">o</span><span class="p">,</span> <span class="nb">type</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">o</span><span class="p">,</span> <span class="s1">'__name__'</span><span class="p">)</span> <span class="ow">and</span> |
| <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="s1">'[a-z].*'</span><span class="p">,</span> <span class="n">o</span><span class="o">.</span><span class="vm">__name__</span><span class="p">))</span> |
| |
| |
| <div class="viewcode-block" id="DeferredPandasModule"><a class="viewcode-back" href="../../../apache_beam.dataframe.pandas_top_level_functions.html#apache_beam.dataframe.pandas_top_level_functions.DeferredPandasModule">[docs]</a><span class="k">class</span> <span class="nc">DeferredPandasModule</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span> |
| <span class="n">array</span> <span class="o">=</span> <span class="n">_defer_to_pandas</span><span class="p">(</span><span class="s1">'array'</span><span class="p">)</span> |
| <span class="n">bdate_range</span> <span class="o">=</span> <span class="n">_defer_to_pandas</span><span class="p">(</span><span class="s1">'bdate_range'</span><span class="p">)</span> |
| |
| <div class="viewcode-block" id="DeferredPandasModule.concat"><a class="viewcode-back" href="../../../apache_beam.dataframe.pandas_top_level_functions.html#apache_beam.dataframe.pandas_top_level_functions.DeferredPandasModule.concat">[docs]</a> <span class="nd">@staticmethod</span> |
| <span class="nd">@frame_base</span><span class="o">.</span><span class="n">args_to_kwargs</span><span class="p">(</span><span class="n">pd</span><span class="p">)</span> |
| <span class="nd">@frame_base</span><span class="o">.</span><span class="n">populate_defaults</span><span class="p">(</span><span class="n">pd</span><span class="p">)</span> |
| <span class="k">def</span> <span class="nf">concat</span><span class="p">(</span> |
| <span class="n">objs</span><span class="p">,</span> |
| <span class="n">axis</span><span class="p">,</span> |
| <span class="n">join</span><span class="p">,</span> |
| <span class="n">ignore_index</span><span class="p">,</span> |
| <span class="n">keys</span><span class="p">,</span> |
| <span class="n">levels</span><span class="p">,</span> |
| <span class="n">names</span><span class="p">,</span> |
| <span class="n">verify_integrity</span><span class="p">,</span> |
| <span class="n">sort</span><span class="p">,</span> |
| <span class="n">copy</span><span class="p">):</span> |
| |
| <span class="k">if</span> <span class="n">ignore_index</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">(</span><span class="s1">'concat(ignore_index)'</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">levels</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span><span class="p">(</span><span class="s1">'concat(levels)'</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">objs</span><span class="p">,</span> <span class="n">Mapping</span><span class="p">):</span> |
| <span class="k">if</span> <span class="n">keys</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">keys</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">objs</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span> |
| <span class="n">objs</span> <span class="o">=</span> <span class="p">[</span><span class="n">objs</span><span class="p">[</span><span class="n">k</span><span class="p">]</span> <span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">]</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">objs</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">objs</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="n">keys</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">preserves_partitioning</span> <span class="o">=</span> <span class="n">partitionings</span><span class="o">.</span><span class="n">Arbitrary</span><span class="p">()</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="c1"># Index 0 will be a new index for keys, only partitioning by the original</span> |
| <span class="c1"># indexes (1 to N) will be preserved.</span> |
| <span class="n">nlevels</span> <span class="o">=</span> <span class="nb">min</span><span class="p">(</span><span class="n">o</span><span class="o">.</span><span class="n">_expr</span><span class="o">.</span><span class="n">proxy</span><span class="p">()</span><span class="o">.</span><span class="n">index</span><span class="o">.</span><span class="n">nlevels</span> <span class="k">for</span> <span class="n">o</span> <span class="ow">in</span> <span class="n">objs</span><span class="p">)</span> |
| <span class="n">preserves_partitioning</span> <span class="o">=</span> <span class="n">partitionings</span><span class="o">.</span><span class="n">Index</span><span class="p">(</span> |
| <span class="p">[</span><span class="n">i</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="n">nlevels</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)])</span> |
| |
| <span class="n">deferred_none</span> <span class="o">=</span> <span class="n">expressions</span><span class="o">.</span><span class="n">ConstantExpression</span><span class="p">(</span><span class="kc">None</span><span class="p">)</span> |
| <span class="n">exprs</span> <span class="o">=</span> <span class="p">[</span><span class="n">deferred_none</span> <span class="k">if</span> <span class="n">o</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">o</span><span class="o">.</span><span class="n">_expr</span> <span class="k">for</span> <span class="n">o</span> <span class="ow">in</span> <span class="n">objs</span><span class="p">]</span> |
| |
| <span class="k">if</span> <span class="n">axis</span> <span class="ow">in</span> <span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="s1">'columns'</span><span class="p">):</span> |
| <span class="n">required_partitioning</span> <span class="o">=</span> <span class="n">partitionings</span><span class="o">.</span><span class="n">Index</span><span class="p">()</span> |
| <span class="k">elif</span> <span class="n">verify_integrity</span><span class="p">:</span> |
| <span class="n">required_partitioning</span> <span class="o">=</span> <span class="n">partitionings</span><span class="o">.</span><span class="n">Index</span><span class="p">()</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">required_partitioning</span> <span class="o">=</span> <span class="n">partitionings</span><span class="o">.</span><span class="n">Arbitrary</span><span class="p">()</span> |
| |
| <span class="k">return</span> <span class="n">frame_base</span><span class="o">.</span><span class="n">DeferredBase</span><span class="o">.</span><span class="n">wrap</span><span class="p">(</span> |
| <span class="n">expressions</span><span class="o">.</span><span class="n">ComputedExpression</span><span class="p">(</span> |
| <span class="s1">'concat'</span><span class="p">,</span> |
| <span class="k">lambda</span> <span class="o">*</span><span class="n">objs</span><span class="p">:</span> <span class="n">pd</span><span class="o">.</span><span class="n">concat</span><span class="p">(</span> |
| <span class="n">objs</span><span class="p">,</span> |
| <span class="n">axis</span><span class="o">=</span><span class="n">axis</span><span class="p">,</span> |
| <span class="n">join</span><span class="o">=</span><span class="n">join</span><span class="p">,</span> |
| <span class="n">ignore_index</span><span class="o">=</span><span class="n">ignore_index</span><span class="p">,</span> |
| <span class="n">keys</span><span class="o">=</span><span class="n">keys</span><span class="p">,</span> |
| <span class="n">levels</span><span class="o">=</span><span class="n">levels</span><span class="p">,</span> |
| <span class="n">names</span><span class="o">=</span><span class="n">names</span><span class="p">,</span> |
| <span class="n">verify_integrity</span><span class="o">=</span><span class="n">verify_integrity</span><span class="p">),</span> <span class="c1"># yapf break</span> |
| <span class="n">exprs</span><span class="p">,</span> |
| <span class="n">requires_partition_by</span><span class="o">=</span><span class="n">required_partitioning</span><span class="p">,</span> |
| <span class="n">preserves_partition_by</span><span class="o">=</span><span class="n">preserves_partitioning</span><span class="p">))</span></div> |
| |
| <span class="n">date_range</span> <span class="o">=</span> <span class="n">_defer_to_pandas</span><span class="p">(</span><span class="s1">'date_range'</span><span class="p">)</span> |
| <span class="n">describe_option</span> <span class="o">=</span> <span class="n">_defer_to_pandas</span><span class="p">(</span><span class="s1">'describe_option'</span><span class="p">)</span> |
| <span class="n">factorize</span> <span class="o">=</span> <span class="n">_call_on_first_arg</span><span class="p">(</span><span class="s1">'factorize'</span><span class="p">)</span> |
| <span class="n">get_option</span> <span class="o">=</span> <span class="n">_defer_to_pandas</span><span class="p">(</span><span class="s1">'get_option'</span><span class="p">)</span> |
| <span class="n">interval_range</span> <span class="o">=</span> <span class="n">_defer_to_pandas</span><span class="p">(</span><span class="s1">'interval_range'</span><span class="p">)</span> |
| <span class="n">isna</span> <span class="o">=</span> <span class="n">_call_on_first_arg</span><span class="p">(</span><span class="s1">'isna'</span><span class="p">)</span> |
| <span class="n">isnull</span> <span class="o">=</span> <span class="n">_call_on_first_arg</span><span class="p">(</span><span class="s1">'isnull'</span><span class="p">)</span> |
| <span class="n">json_normalize</span> <span class="o">=</span> <span class="n">_defer_to_pandas</span><span class="p">(</span><span class="s1">'json_normalize'</span><span class="p">)</span> |
| <span class="n">melt</span> <span class="o">=</span> <span class="n">_call_on_first_arg</span><span class="p">(</span><span class="s1">'melt'</span><span class="p">)</span> |
| <span class="n">merge</span> <span class="o">=</span> <span class="n">_call_on_first_arg</span><span class="p">(</span><span class="s1">'merge'</span><span class="p">)</span> |
| <span class="n">melt</span> <span class="o">=</span> <span class="n">_call_on_first_arg</span><span class="p">(</span><span class="s1">'melt'</span><span class="p">)</span> |
| <span class="n">merge_ordered</span> <span class="o">=</span> <span class="n">frame_base</span><span class="o">.</span><span class="n">wont_implement_method</span><span class="p">(</span> |
| <span class="n">pd</span><span class="p">,</span> <span class="s1">'merge_ordered'</span><span class="p">,</span> <span class="n">reason</span><span class="o">=</span><span class="s1">'order-sensitive'</span><span class="p">)</span> |
| <span class="n">notna</span> <span class="o">=</span> <span class="n">_call_on_first_arg</span><span class="p">(</span><span class="s1">'notna'</span><span class="p">)</span> |
| <span class="n">notnull</span> <span class="o">=</span> <span class="n">_call_on_first_arg</span><span class="p">(</span><span class="s1">'notnull'</span><span class="p">)</span> |
| <span class="n">option_context</span> <span class="o">=</span> <span class="n">_defer_to_pandas</span><span class="p">(</span><span class="s1">'option_context'</span><span class="p">)</span> |
| <span class="n">period_range</span> <span class="o">=</span> <span class="n">_defer_to_pandas</span><span class="p">(</span><span class="s1">'period_range'</span><span class="p">)</span> |
| <span class="n">pivot</span> <span class="o">=</span> <span class="n">_call_on_first_arg</span><span class="p">(</span><span class="s1">'pivot'</span><span class="p">)</span> |
| <span class="n">pivot_table</span> <span class="o">=</span> <span class="n">_call_on_first_arg</span><span class="p">(</span><span class="s1">'pivot_table'</span><span class="p">)</span> |
| <span class="n">show_versions</span> <span class="o">=</span> <span class="n">_defer_to_pandas</span><span class="p">(</span><span class="s1">'show_versions'</span><span class="p">)</span> |
| <span class="n">test</span> <span class="o">=</span> <span class="n">frame_base</span><span class="o">.</span><span class="n">wont_implement_method</span><span class="p">(</span> |
| <span class="n">pd</span><span class="p">,</span> |
| <span class="s1">'test'</span><span class="p">,</span> |
| <span class="n">explanation</span><span class="o">=</span><span class="s2">"because it is an internal pandas testing utility."</span><span class="p">)</span> |
| <span class="n">timedelta_range</span> <span class="o">=</span> <span class="n">_defer_to_pandas</span><span class="p">(</span><span class="s1">'timedelta_range'</span><span class="p">)</span> |
| <span class="n">to_pickle</span> <span class="o">=</span> <span class="n">frame_base</span><span class="o">.</span><span class="n">wont_implement_method</span><span class="p">(</span> |
| <span class="n">pd</span><span class="p">,</span> <span class="s1">'to_pickle'</span><span class="p">,</span> <span class="n">reason</span><span class="o">=</span><span class="s1">'order-sensitive'</span><span class="p">)</span> |
| <span class="n">to_datetime</span> <span class="o">=</span> <span class="n">_defer_to_pandas_maybe_elementwise</span><span class="p">(</span><span class="s1">'to_datetime'</span><span class="p">)</span> |
| <span class="n">notna</span> <span class="o">=</span> <span class="n">_call_on_first_arg</span><span class="p">(</span><span class="s1">'notna'</span><span class="p">)</span> |
| |
| <span class="k">def</span> <span class="fm">__getattr__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span> |
| <span class="k">if</span> <span class="n">name</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s1">'read_'</span><span class="p">):</span> |
| |
| <span class="k">def</span> <span class="nf">func</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="n">frame_base</span><span class="o">.</span><span class="n">WontImplementError</span><span class="p">(</span> |
| <span class="s1">'Use p | apache_beam.dataframe.io.</span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="n">name</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="n">func</span> |
| <span class="n">res</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">pd</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">_is_top_level_function</span><span class="p">(</span><span class="n">res</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">frame_base</span><span class="o">.</span><span class="n">not_implemented_method</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">base_type</span><span class="o">=</span><span class="n">pd</span><span class="p">)</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="k">return</span> <span class="n">res</span></div> |
| |
| |
| <span class="n">pd_wrapper</span> <span class="o">=</span> <span class="n">DeferredPandasModule</span><span class="p">()</span> |
| </pre></div> |
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