python - Function output not printing? -


trying see whether functions work, tried printing out see whether random list sorted, nothing seems printed. how measure time takes sort list out? 

import random import time def mergesort(mylist):     if len(mylist) <= 1:         return mylist         mid = len(mylist) // 2         left = mergesort(mylist[:mid])         right = mergesort(mylist[mid:])         return merge(left,right)   def merge(left,right):     if not left:         return right     if not right:         return left     if left[0] < right[0]:         return [left[0]]+merge(left[1:],right)     else:         return [right[0]]+merge(left,right[1:]) newlist=[] in range(100):     newlist.append(random.randint(1,1000))    val = mergesort(newlist) print (val)

nothing outputted, why?

you blew indentation. here's correct version:

def mergesort(mylist):     if len(mylist) <= 1:         return mylist     mid = len(mylist) // 2     left = mergesort(mylist[:mid])     right = mergesort(mylist[mid:])     return merge(left,right)

in version posted, have main body of routine still inside if statement, after return. means can never execute. if look, should find program did print something, value none.


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