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# | |
# read a .pyc file and pretty-print it | |
# | |
# copied from http://nedbatchelder.com/blog/200804/the_structure_of_pyc_files.html | |
# and updated to Python 3.5 (Nov 10th 2015) | |
# | |
import dis, marshal, struct, sys, time, types, binascii | |
def show_file(fname): | |
f = open(fname, "rb") | |
magic = f.read(4) | |
moddate = f.read(4) | |
filesz = f.read(4) | |
modtime = time.asctime(time.localtime(struct.unpack('=L', moddate)[0])) | |
filesz = struct.unpack('=L', filesz) | |
print ("magic %s" % (binascii.hexlify(magic))) | |
print ("moddate %s (%s)" % (binascii.hexlify(moddate), modtime)) | |
print ("files sz %d" % filesz) | |
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 = binascii.hexlify(h) | |
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])) | |
show_file(sys.argv[1]) |
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