Clib.isalnum()

Tests for alphanumeric character.

Clib.isalpha()

Tests for alphabetic character.

Clib.isascii()

Tests for ASCII coded character.

Clib.iscntrl()

Tests for any control character.

Clib.isdigit()

Tests for any decimal-digit character.

Clib.isgraph()

Tests for any printing character except space.

Clib.islower()

Tests for lower-case alphabetic letter.

Clib.isprint()

Tests for any printing character.

Clib.ispunct()

Tests for punctuation character.

Clib.isspace()

Tests for white-space character.

Clib.isupper()

Tests for upper-case alphabetic character.

Clib.isxdigit()

Tests for hexadecimal-digit character.