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Last active January 31, 2018 06:37
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[isASCII.py]#python
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isASCII.md

How to check if a string in Python is in ASCII?

Python 3 way:

isascii = lambda s: len(s) == len(s.encode())

Since ascii characters can be encoded using only 1 byte, so any ascii characters length will be true to its size after encoded to bytes; whereas other non-ascii characters will be encoded to 2 bytes or 3 bytes accordingly which will increase their sizes.

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