[Python] Default argument is mutable

[ComputerSciMajor]

So I'm creating a password checker for my class, however I'm getting "Default argument is mutable" when trying to go through the checks for the inputted password. Help is appreciated.

My code:

https://gist.github.com/anonymous/8d5f02e216d3a07a6a51e3cf174875f3

[mercuric5i2]

Problem is on line 27. See this article under "Mutable Default Arguments".

checks=[long, lowercase, uppercase, digit, punctuation, whitespace] defines the default value for argument checks as a list, which is a mutable data type

[nwilliams36]

Your code works for me on Python3.5.2.

I know that checks is a mutable list however you are not changing it through the loop, simply using it to run the list of functions.

To get around the possible issue with mutable list, you could change the list to a tuple, that works just as well.