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67 lines
2.5 KiB
Python
Executable File
67 lines
2.5 KiB
Python
Executable File
import struct
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__all__ = ['magics', 'versions']
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def __build_magic(magic):
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return struct.pack('Hcc', magic, '\r', '\n')
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def __by_version(magics):
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by_version = {}
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for m, v in magics.items():
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by_version[v] = m
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return by_version
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versions = {
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# taken from from Python/import.c
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# magic, version
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__build_magic(20121): '1.5', #1.5, 1.5.1, 1.5.2
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__build_magic(50428): '1.6', #1.6
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__build_magic(50823): '2.0', #2.0, 2.0.1
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__build_magic(60202): '2.1', #2.1, 2.1.1, 2.1.2
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__build_magic(60717): '2.2', #2.2
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__build_magic(62011): '2.3', #2.3a0
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__build_magic(62021): '2.3', #2.3a0
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__build_magic(62041): '2.4', #2.4a0
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__build_magic(62051): '2.4', #2.4a3
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__build_magic(62061): '2.4', #2.4b1
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__build_magic(62071): '2.5', #2.5a0
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__build_magic(62081): '2.5', #2.5a0 (ast-branch)
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__build_magic(62091): '2.5', #2.5a0 (with)
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__build_magic(62092): '2.5', #2.5a0 (changed WITH_CLEANUP opcode)
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__build_magic(62101): '2.5', #2.5b3 (fix wrong code: for x, in ...)
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__build_magic(62111): '2.5', #2.5b3 (fix wrong code: x += yield)
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__build_magic(62121): '2.5', #2.5c1 (fix wrong lnotab with for loops and
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# storing constants that should have been removed
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__build_magic(62131): '2.5', #2.5c2 (fix wrong code: for x, in ... in listcomp/genexp)
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__build_magic(62151): '2.6', #2.6a0 (peephole optimizations & STORE_MAP)
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__build_magic(62161): '2.6', #2.6a1 (WITH_CLEANUP optimization)
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__build_magic(62171): '2.7', #2.7a0 (optimize list comprehensions/change LIST_APPEND)
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__build_magic(62181): '2.7', #2.7a0 (optimize conditional branches:
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# introduce POP_JUMP_IF_FALSE and POP_JUMP_IF_TRUE)
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__build_magic(62191): '2.7', #2.7a0 (introduce SETUP_WITH)
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__build_magic(62201): '2.7', #2.7a0 (introduce BUILD_SET)
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__build_magic(62211): '2.7' #2.7a0 (introduce MAP_ADD and SET_ADD)
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}
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magics = __by_version(versions)
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def __show(text, magic):
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print text, struct.unpack('BBBB', magic), \
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struct.unpack('HBB', magic)
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def test():
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import imp
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magic_20 = by_version['2.0']
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current = imp.get_magic()
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current_version = magics[current]
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magic_current = by_version[ current_version ]
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print type(magic_20), len(magic_20), repr(magic_20)
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print
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print 'This Python interpreter has version', current_version
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__show('imp.get_magic():\t', current),
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__show('magic[current_version]:\t', magic_current)
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__show('magic_20:\t\t', magic_20)
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if __name__ == '__main__':
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test()
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