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54 lines
2 KiB
Python
54 lines
2 KiB
Python
# read a .pyc file and pretty-print it
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# copied from https://gist.github.com/twerp/fdc9975f0461821fcd3d7679d1f0f7e9
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# copied from http://nedbatchelder.com/blog/200804/the_structure_of_pyc_files.html
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# and updated to Python 3.5 (Nov 10th 2015)
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import dis, marshal, struct, sys, time, types, binascii
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def show_file(fname):
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f = open(fname, "rb")
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magic = f.read(4)
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moddate = f.read(4)
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filesz = f.read(4)
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modtime = time.asctime(time.localtime(struct.unpack('=L', moddate)[0]))
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filesz = struct.unpack('=L', filesz)
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print("magic %s" % (binascii.hexlify(magic)))
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print("moddate %s (%s)" % (binascii.hexlify(moddate), modtime))
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print("files sz %d" % filesz)
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code = marshal.load(f)
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show_code(code)
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def show_code(code, indent=''):
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print("%scode" % indent)
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indent += ' '
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print("%sargcount %d" % (indent, code.co_argcount))
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print("%snlocals %d" % (indent, code.co_nlocals))
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print("%sstacksize %d" % (indent, code.co_stacksize))
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print("%sflags %04x" % (indent, code.co_flags))
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show_hex("code", code.co_code, indent=indent)
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dis.disassemble(code)
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print("%sconsts" % indent)
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for const in code.co_consts:
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if type(const) == types.CodeType:
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show_code(const, indent+' ')
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else:
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print(" %s%r" % (indent, const))
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print("%snames %r" % (indent, code.co_names))
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print("%svarnames %r" % (indent, code.co_varnames))
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print("%sfreevars %r" % (indent, code.co_freevars))
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print("%scellvars %r" % (indent, code.co_cellvars))
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print("%sfilename %r" % (indent, code.co_filename))
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print("%sname %r" % (indent, code.co_name))
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print("%sfirstlineno %d" % (indent, code.co_firstlineno))
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show_hex("lnotab", code.co_lnotab, indent=indent)
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def show_hex(label, h, indent):
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h = binascii.hexlify(h)
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if len(h) < 60:
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print("%s%s %s" % (indent, label, h))
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else:
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print("%s%s" % (indent, label))
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for i in range(0, len(h), 60):
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print("%s %s" % (indent, h[i:i+60]))
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show_file(sys.argv[1])
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