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| <div class="section" id="serialization-and-ipc"> |
| <span id="api-ipc"></span><h1>Serialization and IPC<a class="headerlink" href="#serialization-and-ipc" title="Permalink to this headline">¶</a></h1> |
| <div class="section" id="inter-process-communication"> |
| <h2>Inter-Process Communication<a class="headerlink" href="#inter-process-communication" title="Permalink to this headline">¶</a></h2> |
| <table class="longtable docutils align-default"> |
| <colgroup> |
| <col style="width: 10%" /> |
| <col style="width: 90%" /> |
| </colgroup> |
| <tbody> |
| <tr class="row-odd"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.new_file.html#pyarrow.ipc.new_file" title="pyarrow.ipc.new_file"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.new_file</span></code></a>(sink, schema, *[, …])</p></td> |
| <td><p>Create an Arrow columnar IPC file writer instance</p></td> |
| </tr> |
| <tr class="row-even"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.open_file.html#pyarrow.ipc.open_file" title="pyarrow.ipc.open_file"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.open_file</span></code></a>(source[, footer_offset])</p></td> |
| <td><p>Create reader for Arrow file format.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.new_stream.html#pyarrow.ipc.new_stream" title="pyarrow.ipc.new_stream"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.new_stream</span></code></a>(sink, schema, *[, …])</p></td> |
| <td><p>Create an Arrow columnar IPC stream writer instance</p></td> |
| </tr> |
| <tr class="row-even"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.open_stream.html#pyarrow.ipc.open_stream" title="pyarrow.ipc.open_stream"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.open_stream</span></code></a>(source)</p></td> |
| <td><p>Create reader for Arrow streaming format.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.read_message.html#pyarrow.ipc.read_message" title="pyarrow.ipc.read_message"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.read_message</span></code></a>(source)</p></td> |
| <td><p>Read length-prefixed message from file or buffer-like object</p></td> |
| </tr> |
| <tr class="row-even"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.read_record_batch.html#pyarrow.ipc.read_record_batch" title="pyarrow.ipc.read_record_batch"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.read_record_batch</span></code></a>(obj, Schema schema, …)</p></td> |
| <td><p>Read RecordBatch from message, given a known schema.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.get_record_batch_size.html#pyarrow.ipc.get_record_batch_size" title="pyarrow.ipc.get_record_batch_size"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.get_record_batch_size</span></code></a>(RecordBatch batch)</p></td> |
| <td><p>Return total size of serialized RecordBatch including metadata and padding.</p></td> |
| </tr> |
| <tr class="row-even"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.read_tensor.html#pyarrow.ipc.read_tensor" title="pyarrow.ipc.read_tensor"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.read_tensor</span></code></a>(source)</p></td> |
| <td><p>Read pyarrow.Tensor from pyarrow.NativeFile object from current position.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.write_tensor.html#pyarrow.ipc.write_tensor" title="pyarrow.ipc.write_tensor"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.write_tensor</span></code></a>(Tensor tensor, NativeFile dest)</p></td> |
| <td><p>Write pyarrow.Tensor to pyarrow.NativeFile object its current position.</p></td> |
| </tr> |
| <tr class="row-even"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.get_tensor_size.html#pyarrow.ipc.get_tensor_size" title="pyarrow.ipc.get_tensor_size"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.get_tensor_size</span></code></a>(Tensor tensor)</p></td> |
| <td><p>Return total size of serialized Tensor including metadata and padding.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.Message.html#pyarrow.ipc.Message" title="pyarrow.ipc.Message"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.Message</span></code></a>()</p></td> |
| <td><p>Container for an Arrow IPC message with metadata and optional body</p></td> |
| </tr> |
| <tr class="row-even"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.MessageReader.html#pyarrow.ipc.MessageReader" title="pyarrow.ipc.MessageReader"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.MessageReader</span></code></a>()</p></td> |
| <td><p>Interface for reading Message objects from some source (like an InputStream)</p></td> |
| </tr> |
| <tr class="row-odd"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.RecordBatchFileReader.html#pyarrow.ipc.RecordBatchFileReader" title="pyarrow.ipc.RecordBatchFileReader"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.RecordBatchFileReader</span></code></a>(source[, …])</p></td> |
| <td><p>Class for reading Arrow record batch data from the Arrow binary file format</p></td> |
| </tr> |
| <tr class="row-even"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.RecordBatchFileWriter.html#pyarrow.ipc.RecordBatchFileWriter" title="pyarrow.ipc.RecordBatchFileWriter"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.RecordBatchFileWriter</span></code></a>(sink, schema, *[, …])</p></td> |
| <td><p>Writer to create the Arrow binary file format</p></td> |
| </tr> |
| <tr class="row-odd"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.RecordBatchStreamReader.html#pyarrow.ipc.RecordBatchStreamReader" title="pyarrow.ipc.RecordBatchStreamReader"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.RecordBatchStreamReader</span></code></a>(source)</p></td> |
| <td><p>Reader for the Arrow streaming binary format.</p></td> |
| </tr> |
| <tr class="row-even"><td><p><a class="reference internal" href="../generated/pyarrow.ipc.RecordBatchStreamWriter.html#pyarrow.ipc.RecordBatchStreamWriter" title="pyarrow.ipc.RecordBatchStreamWriter"><code class="xref py py-obj docutils literal notranslate"><span class="pre">ipc.RecordBatchStreamWriter</span></code></a>(sink, schema, *)</p></td> |
| <td><p>Writer for the Arrow streaming binary format</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section" id="serialization"> |
| <h2>Serialization<a class="headerlink" href="#serialization" title="Permalink to this headline">¶</a></h2> |
| <div class="admonition warning"> |
| <p class="admonition-title">Warning</p> |
| <p>The serialization functionality is deprecated in pyarrow 2.0, and will |
| be removed in a future version. Use the standard library <code class="docutils literal notranslate"><span class="pre">pickle</span></code> or |
| the IPC functionality of pyarrow (see <a class="reference internal" href="../ipc.html#ipc"><span class="std std-ref">Streaming, Serialization, and IPC</span></a>).</p> |
| </div> |
| <table class="longtable docutils align-default"> |
| <colgroup> |
| <col style="width: 10%" /> |
| <col style="width: 90%" /> |
| </colgroup> |
| <tbody> |
| <tr class="row-odd"><td><p><a class="reference internal" href="../generated/pyarrow.serialize.html#pyarrow.serialize" title="pyarrow.serialize"><code class="xref py py-obj docutils literal notranslate"><span class="pre">serialize</span></code></a>(value, …)</p></td> |
| <td><p>EXPERIMENTAL: Serialize a general Python sequence for transient storage and transport.</p></td> |
| </tr> |
| <tr class="row-even"><td><p><a class="reference internal" href="../generated/pyarrow.serialize_to.html#pyarrow.serialize_to" title="pyarrow.serialize_to"><code class="xref py py-obj docutils literal notranslate"><span class="pre">serialize_to</span></code></a>(value, sink, …)</p></td> |
| <td><p>EXPERIMENTAL: Serialize a Python sequence to a file.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p><a class="reference internal" href="../generated/pyarrow.deserialize.html#pyarrow.deserialize" title="pyarrow.deserialize"><code class="xref py py-obj docutils literal notranslate"><span class="pre">deserialize</span></code></a>(obj, …)</p></td> |
| <td><p>EXPERIMENTAL: Deserialize Python object from Buffer or other Python object supporting the buffer protocol.</p></td> |
| </tr> |
| <tr class="row-even"><td><p><a class="reference internal" href="../generated/pyarrow.deserialize_components.html#pyarrow.deserialize_components" title="pyarrow.deserialize_components"><code class="xref py py-obj docutils literal notranslate"><span class="pre">deserialize_components</span></code></a>(components, …)</p></td> |
| <td><p>Reconstruct Python object from output of SerializedPyObject.to_components.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p><a class="reference internal" href="../generated/pyarrow.deserialize_from.html#pyarrow.deserialize_from" title="pyarrow.deserialize_from"><code class="xref py py-obj docutils literal notranslate"><span class="pre">deserialize_from</span></code></a>(source, base, …)</p></td> |
| <td><p>EXPERIMENTAL: Deserialize a Python sequence from a file.</p></td> |
| </tr> |
| <tr class="row-even"><td><p><a class="reference internal" href="../generated/pyarrow.read_serialized.html#pyarrow.read_serialized" title="pyarrow.read_serialized"><code class="xref py py-obj docutils literal notranslate"><span class="pre">read_serialized</span></code></a>(source[, base])</p></td> |
| <td><p>EXPERIMENTAL: Read serialized Python sequence from file-like object.</p></td> |
| </tr> |
| <tr class="row-odd"><td><p><a class="reference internal" href="../generated/pyarrow.SerializedPyObject.html#pyarrow.SerializedPyObject" title="pyarrow.SerializedPyObject"><code class="xref py py-obj docutils literal notranslate"><span class="pre">SerializedPyObject</span></code></a></p></td> |
| <td><p>Arrow-serialized representation of Python object.</p></td> |
| </tr> |
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