Q:

How to count values in a list Python 3

I have code like this:
winners = [red, blue, yellow]

player_1_guesses = [red, green, orange]
player_2_guesses = [red, blue, orange]
player_3_guess = [red, green, yellow]

I'd like to count how many times each value in winners appears across the three player_x_guesses lists. So I would expect to see something like:
totals = {'red': 3, 'blue': 1, 'yellow': 1}

I'm not really sure what this kind of data analysis (?) is called or even what to google to achieve what I want. 
Thanks for any help.

A:

Try doing this:
all_guesses = player_1_guess + player_2_guess + player_3_guess
dct = {i:all_guesses.count(i) for i in winners}

output:
{'blue': 1, 'yellow': 1, 'red': 3}

Using collections:
from collections import Counter

dct = Counter(word for word in all_guesses if word in winners)

