I have a dataframe (which is sorted on date, date column is not included in the example for simplicity) that looks like this: I want to create a new column that counts the occurrence of each value in the letters column, increasing 1 by 1 as the value occurs in the letters column. The data frame I want to reac…
Tag: count
How to count the same (identical) titles in a row
Good day everyone. I’m trying to count title of soccer team in list of dictionaries. There are 10 (sometimes 20) games in list with data. So, home_team in list – looks like: {Team 1, … }, {Team 1, … }, {Team 2, … }, {Team 2, … }, {Team 1, … }, {Team 2, … }, {Tea…
Creating a new columns with maximum count of value in multiple columns
I have a dataframe that contains multiple columns as follow: I want to create a new column based on the player, competition and value of highest occurrence in Home column and Away column. Let’s say the name of a new column that I want to create is Team. I would like have a new column as follow: So it su…
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…
How to count the number of times a specific character appears in a list?
Okay so here is a list: I want to be able to count the total number of times a user inputted letter appears throughout the entire list. Let’s say the letter is ‘a’ I want the program to go through and count the number of times ‘a’ appears in the list. In this case, the total numb…
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 num…
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 …
Counting word frequency and making a dictionary from it
I want to take every word from a text file, and count the word frequency in a dictionary. Example: ‘this is the textfile, and it is used to take words and count’ I am not that far, but I just can’t see how to complete it. My code so far: Answer If you don’t want to use collections.Coun…
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 wou…
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 w…