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+:mod:`struct` -- pack and unpack primitive data types
+=====================================================
+
+.. module:: struct
+   :synopsis: pack and unpack primitive data types
+
+See `Python struct <https://docs.python.org/3/library/struct.html>`_ for more
+information.
+
+Functions
+---------
+
+.. function:: calcsize(fmt)
+
+   Return the number of bytes needed to store the given ``fmt``.
+
+.. function:: pack(fmt, v1, v2, ...)
+
+   Pack the values ``v1``, ``v2``, ... according to the format string ``fmt``.
+   The return value is a bytes object encoding the values.
+
+.. function:: unpack(fmt, data)
+
+   Unpack from the ``data`` according to the format string ``fmt``.
+   The return value is a tuple of the unpacked values.