Beginner at Python. Trying to count certain integer from random string of code

[kiaspelleditwrong]

I hope my title wasn't too long. I have code to make a random string of numbers; 0 or 1. I want it to count and print how many times 1 appears in the string of numbers. This is what i have so far:

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import random def Rand(Start, end, num):     res = [ ]       for j in range (num):         res.append(random.randint(start, end))       return res num = 1000 start = 0 end = 1 pie = (Rand(start, end, num))   def count(lst):             return sum(lst)   lst = pie print(count(lst))

I feel that i have no idea if its actually counting whether its 1 or not. I'm kind of figuring there's a better way to do what I'm trying to accomplish. Thanks for helping!

[perfringo]

Python strings have method .count() for counting purpose:

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>>> s = '1100101' >>> s.count('1') 4

[Malt]

Python strings have method .count() for counting purpose:

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>>> s = '1100101' >>> s.count('1') 4

It is working for list as well

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>>> s=['1','0','1','0','1','1','0'] >>> s.count('1') 4

[perfringo]

For counting hashable items there is collections.Counter().

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>>> from collections import Counter >>> s = '1100101'                                                                         >>> Counter(s)                                                                            Counter({'1': 4, '0': 3}) >>> Counter(s)['1'] 4

Writing your own counter for specific needs is pretty simple. Following is counting even numerics in a string (it will raise ValueError if character is not numeric):

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>>> numeric = '23542' >>> sum(1 for char in numeric if int(char) % 2 == 0) 3