First clear solution for House Password by saklar13 - python coding challenges

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First solution in Clear category for House Password by saklar13

checkio = lambda x: (len(x) >9 and
                     not x.isdigit() and
                     not x.islower() and
                     not x.isupper() and
                     not x.isalpha())

Dec. 24, 2014

Comments:

bellot.hamza on April 3, 2015, 4:56 p.m.
it's not clear at all !

maqquettex on April 15, 2015, 8:03 p.m.
Smart! didnt even think about such a solution...

Marcin_Coles on Oct. 21, 2017, 8:58 a.m.
can someone explain this? looks clever, but hard to learn from

saklar13 on Oct. 21, 2017, 11:02 a.m.
This solution works on exclusion method. We know that all symbols are letters or digits (from condition - re.match("[a-zA-Z0-9]+", password)). So we check that password doesn't consist only from numbers or only from letters or only from lower case letters or only from upper case letters.

Marcin_Coles on Oct. 22, 2017, 1:47 p.m.
Sorry saklar - yours is actually very clear. I thought I was asking the question of another solution. apologies for mixup.

Strings Theory

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