Mappings two list of dict by key Question: I have two list of dict with Python and I have a problem I don’t know how to solve it? my_list_a = [ {"code": "A", "name": "Mr A"}, {"code": "B", "name": "Mrs B"}, {"code": "C", "name": "Mrs C"} ] my_list_b = [ {"code": "A", "university": "Oxford"}, {"code": …
Product of multiple lists–individual lists vs array of lists, need help understanding Question: Forewarning: I’m new to Python and I’m teaching myself, so this question may just have a trivial solution–any help (and patience) is very much appreciated! Okay, big picture is that I want to get the union of all possible intersections of a …
python – character replacement combinations with a list Question: I’m trying to create a list of words that contains all possible combinations of character replacement by changing multiple characters with their respective lists. The input is also a list of keywords. Example: keywords=[“magic”, “mate”] aoptions = [“a”, “4”, “@”] boptions = [“b”, “8”] eoptions = …
Is there a numpy/scipy dot product, calculating only the diagonal entries of the result? Question: Imagine having 2 numpy arrays: > A, A.shape = (n,p) > B, B.shape = (p,p) Typically p is a smaller number (p <= 200), while n can be arbitrarily large. I am doing the following: result = np.diag(A.dot(B).dot(A.T)) As you …
Is there a built-in product() in Python? Question: I’ve been looking through a tutorial and book but I can find no mention of a built in product function i.e. of the same type as sum(), but I could not find anything such as prod(). Is the only way I could find the product of items …
What's the function like sum() but for multiplication? product()? Question: Python’s sum() function returns the sum of numbers in an iterable. sum([3,4,5]) == 3 + 4 + 5 == 12 I’m looking for the function that returns the product instead. somelib.somefunc([3,4,5]) == 3 * 4 * 5 == 60 I’m pretty sure such a function …
