I am filtering rows in a dataframe by values in two columns. For some reason the OR operator behaves like I would expect AND operator to behave and vice versa. My test code: import pandas as pd df = pd.DataFrame({‘a’: range(5), ‘b’: range(5) }) # let’s insert some -1 values df[‘a’][1] = -1 df[‘b’][1] = … Read more
I have a pandas Series object containing boolean values. How can I get a series containing the logical NOT of each value? For example, consider a series containing: True True True False The series I’d like to get would contain: False False False True This seems like it should be reasonably simple, but apparently I’ve … Read more
I was playing around in jsfiddle.net and I’m curious as to why this returns true? if(0 < 5 < 3) { alert(“True”); } So does this: if(0 < 5 < 2) { alert(“True”); } But this doesn’t: if(0 < 5 < 1) { alert(“True”); } Is this quirk ever useful? 14 Answers 14
Does Python support short-circuiting in boolean expressions? 4 Answers 4
An interviewer recently asked me this question: given three boolean variables, a, b, and c, return true if at least two out of the three are true. My solution follows: boolean atLeastTwo(boolean a, boolean b, boolean c) { if ((a && b) || (b && c) || (a && c)) { return true; } else{ … Read more
I’m trying to make a function that will compare multiple variables to an integer and output a string of three letters. I was wondering if there was a way to translate this into Python. So say: x = 0 y = 1 z = 3 mylist = [] if x or y or z == … Read more
