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Tag: count

Python: Counting occurrences of List element within List

I’m trying to count the number of occurrences of elements within a list, if such elements are also lists. The order is also important. One important factor is that [‘a’, ‘b’, ‘c’] != [‘c’, ‘b’, ‘a’] I have tried: Which both resulted in [‘a’, ‘b’, ‘c’] = [‘c’, ‘b’, ‘a’], one thing i didn’t want I also tried: Which only

Count duplicate lists inside a list

I want the result to be 2 since number of duplicate lists are 2 in total. How do I do that? I have done something like this But the count value is 1 as it returns matched lists. How do I get the total number of duplicate lists? Answer Solution You can use collections.Counter if your sub-lists only contain numbers

Count consecutive characters

How would I count consecutive characters in Python to see the number of times each unique digit repeats before the next unique digit? At first, I thought I could do something like: So that in this manner I could see the number of times each unique digit repeats. But this, of course, falls out of range when i reaches the

Pandas ‘count(distinct)’ equivalent

I am using Pandas as a database substitute as I have multiple databases (Oracle, SQL Server, etc.), and I am unable to make a sequence of commands to a SQL equivalent. I have a table loaded in a DataFrame with some columns: In SQL, to count the amount of different clients per year would be: And the result would be How

How to get the number of active threads started by specific class?

code looks like below: Is there a way to get the number of threads being active by originating class ? Answer This is a minor modification of Doug Hellman’s multiprocessing ActivePool example code (to use threading). The idea is to have your workers register themselves in a pool, unregister themselves when they finish, using a threading.Lock to coordinate modification of