Python

NumPy array row differences

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I have a NumPy array vectors = np.random.randn(rows, cols). I want to find differences between its rows according to some other array diffs which is sparse and “2-hot”: containing a 1 in its column corresponding to the first row of vectors and a -1 corresponding to the second row. Perhaps an example shall make it clearer:

why does this accept any username as long as password is correct

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username = input("Welcome, please enter your username.") password = input("Please enter your password.") if username != "tony" and password != "password123": print("Access Denied.") else: print("Welcome to the jungle") Answers: Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat … Read more

Why is the function inside the dictionary executing before they’re called

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I’m trying to make simple code that reads names and put it on a list, what i am intending to do is a series of functions to add names to the list, remove name, find name position etc. so it will have a lot of ifs, to avoid that i tried to use a dictionary to store the functions that will be called, but when i execute the program the functions inside the dictionary are running before i can input the number to execute it

Python tkinter Entry widget validation error : TypeError: ‘str’ object is not callable

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I am trying to use built-in input validation of Tkinter’s Entry widget but I can’t figure out why I receive a TypeError when entry validation is triggered. (regardless of what kind of event triggers the validation). In the simple code below, I am trying to validate only numerical input from the user. Alphabetical characters must disable the Apply button. But as soon as you enter ANY character, a “TypeError: ‘str’ object is not callable” is raided. Any ideas why?!