Always true when testing if string == various OR'ed alternatives

Question

So the problem I am currently having is that my program always calls the \'md5cypher\' class which I have defined, even if the input is not in that list:

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Answer 1

You have a fundamental misunderstanding of how boolean operators work in python.

You have to consider the operator precedences, and then your condition becomes

if (toe=='md5') or ('M') or ('m') or ('Md5') or ('MD5'):

which is equivalent to

if (toe=='md5') or True:

which of course is always true. A solution to your problem would be

if toe.lower() in ('m', 'md5'):