https://pan.baidu.com/s/1o8fVxkI 

TIPS：Python 2.7 提取密码：kd37

题解：

Py.pyc反编译成Python源代码

import base64


def encode(message):
    s = ''
    for i in message:
        x = ord(i) ^ 32
        x = x + 16
        s += chr(x)

    return base64.b64encode(s)


correct = 'XlNkVmtUI1MgXWBZXCFeKY+AaXNt'
flag = ''
print 'Input flag:'
flag = raw_input()
if encode(flag) == correct:
    print 'correct'
else:
    print 'wrong'
import base64


def encode(message):
    s = ''
    for i in message:
        x = ord(i) ^ 32
        x = x + 16
        s += chr(x)

    return base64.b64encode(s)


correct = 'XlNkVmtUI1MgXWBZXCFeKY+AaXNt'
flag = ''
print 'Input flag:'
flag = raw_input()
if encode(flag) == correct:
    print 'correct'
else:
    print 'wrong'

XlNkVmtUI1MgXWBZXCFeKY+AaXNt

base64解密

^SdVkT#S ]`Y\!^)ism

有不可映射字符

^SdVkT#S ]`Y\!^)\x8f\x80ism

程序直接逆序解码 

import base64

correct = 'XlNkVmtUI1MgXWBZXCFeKY+AaXNt'
key=base64.b64decode(correct)
print(key)
flag = ''
for i in key:
	flag+=chr((ord(i)-16)^32)
print(flag)

 nctf{d3c0mpil1n9_PyC}