Want to improve this post? Provide detailed answers to this question, including citations

What does this do, and why should one include the if statement? if __name__ == "__main__": prin

Want to improve this post? Provide detailed answers to this question, including citations

What are metaclasses? What are they used for?

How do I check whether a file exists or not, without using the try statement?

I want to merge two dictionaries into a new dictionary. x = {'a': 1, 'b': 2} y = {'b': 3, 'c': 4} z

How do I call an external command within Python as if I had typed it in a shell or command prompt?

How do I create a directory at a given path, and also create any missing parent directories along t

How do I access the index while iterating over a sequence with a for loop? xs = [8, 23, 45] for x

I have a list of lists like [ [1, 2, 3], [4, 5, 6], [7], [8, 9] ] How can I flatte

What is the difference between a method decorated with @staticmethod and one decorated with @classm

How does Python's slice notation work? That is: when I write code like a[x:y:z], a[:], a[::2] etc.,

Given a list ["foo", "bar", "baz"] and an item in the list "bar", how do I get its index 1?

d = {'x': 1, 'y': 2, 'z': 3} for key in d: print(key, 'corresponds to', d[key]) How does Pyth

How do I create or use a global variable inside a function? How do I use a global variable that was