为了让问题有趣一点，让我来一行代码搞定它 =w=

python2 -c 'import binascii as b; from sys import stdin, stdout; stdout.write(b.unhexlify(stdin.read().strip().replace("\\x", "")))'
python3 -c 'import binascii as b; from sys import stdin, stdout; stdout.buffer.write(b.unhexlify(stdin.buffer.read().strip().replace(b"\\x", b"")))'
ascii2uni -qa7

最后一行是赠品 =w=

在用Python2？换Python3吧。

Python2下：

print('\xe6\x88\x90\xe9\x83\xbd') ==> '成都'

import os
f = open(r'2.txt').read().strip().replace("\\x","")
print f.decode("hex")