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89 lines
3.9 KiB
Python
Executable File
89 lines
3.9 KiB
Python
Executable File
from __future__ import print_function
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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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by_magic = {}
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by_version = {}
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def __by_version(magics):
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for m, v in magics.items():
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by_magic[m] = v
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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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__build_magic(3000): '3.0', # 3.000
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__build_magic(3010): '3.0', # 3.000 (removed UNARY_CONVERT)
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__build_magic(3020): '3.0', # 3.000 (added BUILD_SET)
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__build_magic(3030): '3.0', # 3.000 (added keyword-only parameters)
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__build_magic(3040): '3.0', # 3.000 (added signature annotations)
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__build_magic(3050): '3.0', # 3.000 (print becomes a function)
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__build_magic(3060): '3.0', # 3.000 (PEP 3115 metaclass syntax)
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__build_magic(3061): '3.0', # 3.000 (string literals become unicode)
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__build_magic(3071): '3.0', # 3.000 (PEP 3109 raise changes)
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__build_magic(3081): '3.0', # 3.000 (PEP 3137 make __file__ and __name__ unicode)
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__build_magic(3091): '3.0', # 3.000 (kill str8 interning)
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__build_magic(3101): '3.0', # 3.000 (merge from 2.6a0, see 62151)
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__build_magic(3103): '3.0', # 3.000 (__file__ points to source file)
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__build_magic(3111): '3.0', # 3.0a4 (WITH_CLEANUP optimization).
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__build_magic(3131): '3.0', # 3.0a5 (lexical exception stacking, including POP_EXCEPT)
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__build_magic(3141): '3.1', # 3.1a0 (optimize list, set and dict comprehensions)
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__build_magic(3151): '3.1', # 3.1a0 (optimize conditional branches)
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__build_magic(3160): '3.2', # 3.2a0 (add SETUP_WITH)
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__build_magic(3170): '3.2', # 3.2a1 (add DUP_TOP_TWO, remove DUP_TOPX and ROT_FOUR)
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__build_magic(3180): '3.2', # 3.2a2 (add DELETE_DEREF)
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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), struct.unpack('HBB', magic))
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def test():
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import imp
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magic_20 = magics['2.0']
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current = imp.get_magic()
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current_version = struct.unpack('HBB', current)[0]
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magic_current = by_magic[ current ]
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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', magic_current)
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print('Magic code: ', current_version)
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print(type(magic_20), len(magic_20), repr(magic_20))
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if __name__ == '__main__':
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test()
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