问题
I have a long string that I want to encode to ascii. I'm doing:
s = s.encode('ascii', 'replace')
but I get:
'ascii' codec can't decode byte 0xc3 in position 2646: ordinal not in range(128)
(I've also tried 'ignore' but it doesn't help.)
What am I doing wrong?
回答1:
Your string is already encoded with some encoding. Before encoding it to ascii, you must decode it first.
Python is implicity trying to decode it (That's why you get a UnicodeDecodeError not UnicodeEncodeError).
You can solve the problem by explicity decoding your bytestring (using the appropriate encoding) before trying to reencode it to ascii.
Example:
s = s.decode('some_encoding').encode('ascii', 'replace')
Use the correct encoding your string was encoded in first place, instead of 'some_encoding'.
You have to know which encoding a string is using before you can decode it. Where did you get the string from?
回答2:
encode should be used on unicode objects to convert it to a str.
If you have a str object, you should use decode to convert it to a unicode.
来源：https://stackoverflow.com/questions/1762564/encoding-a-string-to-ascii