First uncategorized solution for House Password by integrich0 - python coding challenges

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First solution in Uncategorized category for House Password by integrich0

import re

def checkio(data):
    'Return True if password strong and False if not'
    return bool(re.match(r'^.*(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{10,}$', data))

if __name__ == '__main__':
    assert checkio('A1213pokl')==False, 'First'
    assert checkio('bAse730onE4')==True, 'Second'
    print('All ok')

Oct. 29, 2012

Comments:

Madjestik on Nov. 12, 2012, 7:51 p.m.
easy to read and short, good job.

Havilland on Nov. 14, 2012, 3:54 p.m.
Really nice, I really need to gain more experience in Regex!

Polaroid on Nov. 26, 2012, 6:29 p.m.
<pre class='brush: python'> return bool(re.match(r'^.*(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{10,}$', data)) </pre> Could you explain your regex please. Even after reading the python doc i don't get it :)

integrich0 on Nov. 26, 2012, 6:43 p.m.
<pre class='brush: python'> return bool(re.match(r'^.*(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{10,}$', data)) </pre> I used lookaheads (see here <a href="http://www.regular-expressions.info/lookaround.html)">http://www.regular-expressions.info/lookaround.html)</a> , the whole regex is wrapped in ^& indicating the start and the end, it starts with looking for any character zero or more times .* and then the parts you see in the parenthesis are lookaheads, it will match the given regex inside it, but won't make it part of the match, it's just an assertion whether the characters are found or not, so you see 3 assertions of that kind, one looking for digits, one for small letters and one for big letters. It ends with the {10,} meaning the whole string can be 10 or more characters long.

Polaroid on Nov. 26, 2012, 6:48 p.m.
<pre class='brush: python'> return bool(re.match(r'^.*(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{10,}$', data)) </pre> thx!

vrusinov on Jan. 8, 2013, 12:06 a.m.
'Some people, when confronted with a problem, think "I know, I'll use regular expressions." Now they have two problems.' (c) Yep, I've used regexp as well, but it was much simpler. This looks like overkill.

yfzhou on Sept. 9, 2013, 9:57 a.m.
<pre class='brush: python'> assert checkio('bAse730onE4')==True, 'Second' </pre> It's so pretty, but maybe not easy to understand.

Strings Theory

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