Remember there are many different whitespaces. 'NARROW NO-BREAK SPACE' gave me a hard time about debugging.

whitespaces.py

# On Chrome, most of them are recognized as 'SPACE' but Python differentiates this.
chars = [
    ('	', 'CHARACTER TABULATION'),
    (' ','SPACE'),
    (' ','NO-BREAK SPACE'),
    (' ', 'CGHAM SPACE MARK'),
    (' ', 'EN QUAD'),
    (' ', 'EM QUAD'),
    (' ','EN SPACE'),
    (' ', 'EM SPACE'),
    (' ', 'THREE-PER-EM SPACE'),
    (' ', 'FOUR-PER-EM SPACE'),
    (' ', 'SIX-PER-EM SPACE'),
    (' ', 'FIGURE SPACE'),
    (' ', 'PUNCTUATION SPACE'),
    (' ', 'THIN SPACE'),
    (' ', 'NARROW NO-BREAK SPACE'),
    (' ', 'MEDIUM MATHEMATICAL SPACE'),
    ('　', 'IDEOGRAPHIC SPACE'),
]


for i, (char, name) in enumerate(chars):
    if i == 0: print('      ', end='')
    print(f'{ord(char):6d}', end='')
print()
for char, name in chars:
    print(f'{ord(char):6d}', end='')
    for c, n in chars:
        if c == char: print(f'     o', end='')
        else        : print(f'     x', end='')
    print()

print("\N{THIN SPACE}")
print(ord(' '), ord(' '))