pythonlistconditional-statementsmembership

Check if something is (not) in a list in Python

I have a list of tuples in Python, and I have a conditional where I want to take the branch ONLY if the tuple is not in the list (if it is in the list, then I don't want to take the if branch)

if curr_x -1 > 0 and (curr_x-1 , curr_y) not in myList: 

    # Do Something

This is not really working for me though. What have I done wrong?

Solution

  • The bug is probably somewhere else in your code, because it should work fine:

    >>> 3 not in [2, 3, 4]
False
>>> 3 not in [4, 5, 6]
True

    Or with tuples:

    >>> (2, 3) not in [(2, 3), (5, 6), (9, 1)]
False
>>> (2, 3) not in [(2, 7), (7, 3), "hi"]
True