all Python 3Byte sequencesfunction

bytearray.isdigit

bytearray — is* checks

All bytes are ASCII digits and non-empty.

Syntax

ba.isdigit(...)

It answers exactly one question: are all bytes digits 0-9. A minus sign, decimal point, space or thousands separator makes it False, so it is not an "is this a number" test. Bytes have no isdecimal() or isnumeric() counterparts the way str does — attempting the conversion and catching ValueError is the more reliable route.

Examples

print(bytearray(b'123').isdigit())   # → True
print(bytearray(b'12.3').isdigit())   # → False
print(bytearray(b'-5').isdigit())   # → False
print(bytearray(b'').isdigit())   # → False
raw = bytearray(b'2026')
print(int(raw) if raw.isdigit() else None)   # → 2026

See also

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