hex check

[Raymond Hettinger]

[Ruslan Spivak]
> Does anybody have a hint how to check if input hex number is in correct
> hex format?

Try converting it.
If the conversion fails, then the format was bad:

>>> int('0x2F', 16)
47
>>> int('0x2G', 16)

Traceback (most recent call last):
  File "<pyshell#1>", line 1, in -toplevel-
    int('0x2G', 16)
ValueError: invalid literal for int(): 0x2G



Raymond Hettinger