如何在Python中将文本字符串编码为数字？
如何在Python中将文本字符串编码为数字？
提问于 2019-03-29 06:20:33
假设你有一个字符串：
mystring = "Welcome to the InterStar cafe, serving you since 2412!"我正在寻找一种将字符串转换为数字的方法，就像这样：
encoded_string = number_encode(mystring)
print(encoded_string)
08713091353153848093820430298..that您可以将其转换回原始字符串。
decoded_string = number_decode(encoded_string)
print(decoded_string)
"Welcome to the InterStar cafe, serving you since 2412!"它不一定是密码安全的，但无论它运行在哪台计算机上，它都必须为相同的字符串提供相同的数字。
回答 2
Stack Overflow用户
回答已采纳
发布于 2019-03-29 06:28:13
将其encode为固定编码的bytes，然后使用int.from_bytes将bytes转换为int。相反的操作是在生成的int上调用.to_bytes，然后用decode返回str
mystring = "Welcome to the InterStar cafe, serving you since 2412!"
mybytes = mystring.encode('utf-8')
myint = int.from_bytes(mybytes, 'little')
print(myint)
recoveredbytes = myint.to_bytes((myint.bit_length() + 7) // 8, 'little')
recoveredstring = recoveredbytes.decode('utf-8')
print(recoveredstring)这有一个缺陷，那就是如果字符串以NUL字符('\0'/\x00')结尾，您将丢失它们(切换到'big'字节顺序将从前面丢失它们)。如果这是一个问题，你总是可以显式地填充一个'\x01'，并在解码端删除它，这样就没有尾随的0可丢失：
mystring = "Welcome to the InterStar cafe, serving you since 2412!"
mybytes = mystring.encode('utf-8') + b'\x01' # Pad with 1 to preserve trailing zeroes
myint = int.from_bytes(mybytes, 'little')
print(myint)
recoveredbytes = myint.to_bytes((myint.bit_length() + 7) // 8, 'little')
recoveredstring = recoveredbytes[:-1].decode('utf-8') # Strip pad before decoding
print(recoveredstring)Stack Overflow用户
发布于 2019-03-29 06:28:07
如果您只是想让某个字符串变得不可读，您可以使用base64、base64.b64encode(s, altchars=None)和base64.b64decode(s, altchars=None, validate=False)
考虑到它需要类似字节的对象，所以字符串应该以b"I am a bytes-like string":开头
>>> import base64
>>> coded = base64.b64encode(b"Welcome to the InterStar cafe, serving you since 2412!")
>>> print(coded)
b'V2VsY29tZSB0byB0aGUgSW50ZXJTdGFyIGNhZmUsIHNlcnZpbmcgeW91IHNpbmNlIDI0MTIh'
>>> print(base64.b64decode(coded))
b"Welcome to the InterStar cafe, serving you since 2412!"如果您已经有字符串，可以使用str.encode('utf-8')对其进行转换
>>> myString = "Welcome to the InterStar cafe, serving you since 2412!"
>>> bString = myString.encode('utf-8')
>>> print(bString)
b'Welcome to the InterStar cafe, serving you since 2412!'
>>> print(bString.decode())
'Welcome to the InterStar cafe, serving you since 2412!'如果您确实需要将字符串仅转换为数字，则必须使用@ShadowRanger's answer。
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原文链接：
https://stackoverflow.com/questions/55407713
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