Input: 28 Output: digit Input: a Output: not a digit. Input: 21ab Output: not a digit.
Code # 1: Using Python Regular Expressions
re.search (): This method either returns None (if the pattern does not match), or re.MatchObject, which contains information about the corresponding part of the string. This method stops after the first match, so it's better for checking regular expressions than for extracting data.
Digit Not a Digit Not a Digit Not a Digit
Code # 2: Using the string.isnumeric ()
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