Python determines whether a string is alphanumeric case or a space

Str.isalnum () All characters are numbers or letters, return Ture for true, or False.

Str.isalpha () All characters are letters ( when the string is Chinese, also returns True), Ture returns True, otherwise False is returned.

Str.isdigit () All characters are numbers, return Ture for true, or False.

Str.islower () All characters are lowercase and return Ture for true, otherwise False is returned.

Str.isupper () All characters are uppercase and return Ture for true, otherwise False is returned.

Str.istitle () All words are capitalized, return Ture true, or False.

Str.isspace () All characters are whitespace characters, return Ture for true, or False.

Python determines whether a string is alphanumeric case or a space