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@aisk /pycat.py
Created Oct 25, 2012

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import dis, marshal, struct, sys, time, types
def show_file(fname):
f = open(fname, "rb")
magic = f.read(4)
moddate = f.read(4)
modtime = time.asctime(time.localtime(struct.unpack('L', moddate)[0]))
print "magic %s" % (magic.encode('hex'))
print "moddate %s (%s)" % (moddate.encode('hex'), modtime)
code = marshal.load(f)
show_code(code)
def show_code(code, indent=''):
print "%scode" % indent
indent += ' '
print "%sargcount %d" % (indent, code.co_argcount)
print "%snlocals %d" % (indent, code.co_nlocals)
print "%sstacksize %d" % (indent, code.co_stacksize)
print "%sflags %04x" % (indent, code.co_flags)
show_hex("code", code.co_code, indent=indent)
dis.disassemble(code)
print "%sconsts" % indent
for const in code.co_consts:
if type(const) == types.CodeType:
show_code(const, indent+' ')
else:
print " %s%r" % (indent, const)
print "%snames %r" % (indent, code.co_names)
print "%svarnames %r" % (indent, code.co_varnames)
print "%sfreevars %r" % (indent, code.co_freevars)
print "%scellvars %r" % (indent, code.co_cellvars)
print "%sfilename %r" % (indent, code.co_filename)
print "%sname %r" % (indent, code.co_name)
print "%sfirstlineno %d" % (indent, code.co_firstlineno)
show_hex("lnotab", code.co_lnotab, indent=indent)
def show_hex(label, h, indent):
h = h.encode('hex')
if len(h) < 60:
print "%s%s %s" % (indent, label, h)
else:
print "%s%s" % (indent, label)
for i in range(0, len(h), 60):
print "%s %s" % (indent, h[i:i+60])
if __name__ == '__main__':
show_file(sys.argv[1])
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