Function ishex

tools/python-3.11.9-amd64/Lib/quopri.py:172–175

Return true if the byte ordinal 'c' is a hexadecimal digit in ASCII.

(c)

# Other helper functions
def ishex(c):
    """Return true if the byte ordinal 'c' is a hexadecimal digit in ASCII."""
    assert isinstance(c, bytes)
    return b'0' <= c <= b'9' or b'a' <= c <= b'f' or b'A' <= c <= b'F'

def unhex(s):
    """Get the integer value of a hexadecimal number."""