Oh, I thought you needed only 4 total chars.
Using a regex probably is a bit overkill here:
>>> import string
>>> accepted = string.letters + string.digits
>>> max_numbers = 4
>>>
>>> def test(word):
... numbers = 0
... for c in word:
... if c.isdigit():
... numbers += 1
... if not c in accepted or numbers > max_numbers:
... return False
... return True
...
>>>
>>> test('gerd12')
True
>>> test('gerd1234')
True
>>> test('gerd 1234 ')
False
>>> test('gerd 1234')
False
>>> test('%$$%%#$')
False
>>> test('gerd123456')
False
On Sat, Aug 31, 2013 at 6:11 PM, Gerd Koetje <deonlinefotogr...@gmail.com>wrote:
> to explain myself a bit more:
>
> gerd12 = should be valid
> gerd1234 = should be valid
> gerd 1234 = should not be valid
> %$$%%#$ = should not be valid
> gerd123456 - should not be valid
>
> etc etc
>
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