pyc文件，用在线pyc反编译工具pyc反编译

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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'

flag值经过encode函数，返回值为base64加密
写脚本先base64解密

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import base64
s='XlNkVmtUI1MgXWBZXCFeKY+AaXNt'
s=base64.b64decode(s)
print(s)

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

逆向脚本

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s="b'^SdVkT#S ]`Y\\!^)\x8f\x80ism'"
flag = ''
for i in s:
    x = ord(i) - 16
    x = x ^ 32
    flag += chr(x)
print(flag)

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nctf{d3c0mpil1n9_PyC}