import dis
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import inspect
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def iterate_instructions(code_object):
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"""Delivers the byte-code instructions as a continuous stream.
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Yields `dis.Instruction`. After each code-block (`co_code`), `None` is
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yielded to mark the end of the block and to interrupt the steam.
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"""
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# The arg extension the EXTENDED_ARG opcode represents is automatically handled by get_instructions() but the
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# instruction is left in. Get rid of it to make subsequent parsing easier/safer.
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yield from (i for i in dis.get_instructions(code_object) if i.opname != "EXTENDED_ARG")
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yield None
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# For each constant in this code object that is itself a code object,
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# parse this constant in the same manner.
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for constant in code_object.co_consts:
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if inspect.iscode(constant):
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yield from iterate_instructions(constant)
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