# How to find average value of a list in python

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Category：Languages

I want to return a function which gives the average of all the marks which are 50 or more. When I run my code, it always returns an empty list. Here is what I have tried:

``def get_pass_average(marks):     average = []     for count in marks:         if count >= 50:            average = sum(count) / len(count)               return round(average,2)  def test_get_pass_average():     list1 = [50, 83, 26, 65, 92, 29, 77, 64]     print('%.2f' % (get_pass_average(list1))) ``

Please helps me to figure out the problems in my code, and the output should be 71.83. Many thanks.

Try this:

``l=[i for i in list1 if i>=50] print(sum(l)/len(l)) ``

Or:

``from statistics import mean l=[i for i in list1 if i>=50] print(mean(l)) ``

If want to condition for empty lists:

``l=[i for i in list1 if i>=50] if l:     print(sum(l)/len(l)) ``

Or:

``from statistics import mean l=[i for i in list1 if i>=50] if l:     print(mean(l)) ``