Element-wise logical OR in Pandas Question: I am aware that AND corresponds to & and NOT, ~. What is the element-wise logical OR operator? I know "or" itself is not what I am looking for. Asked By: Keith || Source Answers: The corresponding operator is |: df[(df < 3) | (df == 5)] would elementwise …
Python "if" statement ignored Question: I’m triggering loop within loop in Python, if one of the multiple conditions ("or") is met. The script seems to skip the "if" statement and enters inner loop without meeting required conditions. Code # Begin TestCase # Main logic: execute RemoteController macro, if expected state == true, set ‘Success’, else: …
Find the indices of elements greater than x Question: Given the following vector, a = [1, 2, 3, 4, 5, 6, 7, 8, 9] I need to identify the indices of “a” whose elements are >= than 4, like this: idx = [3, 4, 5, 6, 7, 8] The info in “idx” will be used …
How to use numpy.where with logical operators Question: I’m trying to find the indices of all elements in an array that are greater than a but less than b. It’s probably just a problem with my syntax but this doesn’t work: numpy.where((my_array > a) and (my_array < b)) How should I fix this? Or is …
How to prevent short-circuit evaluation? Question: This is a problem that occurred to me while working on a Django project. It’s about form validation. In Django, when you have a submitted form, you can call is_valid() on the corresponding form object to trigger the validation and return a Boolean value. So, usually you have code …
and / or operators return value Question: I was watching a 2007 video on Advanced Python or Understanding Python, and at 18’27” the speaker claims “As some may know in Python and and or return one of the two values, whereas not returns always a boolean.” When has this been the case? As far as …
How do you get the logical xor of two variables in Python? Question: How do you get the logical xor of two variables in Python? For example, I have two variables that I expect to be strings. I want to test that only one of them contains a True value (is not None or the …
