max of a list in python -

so need write , test function returns index of largest element in list (or, if several elements have largest value, index of first 1 of them) , i'm not allowed use max function. appreciated!

def largestelementindex(lst):     x=0     maxnum=0     while x+1 < len(lst):         if lst[x] > maxnum:             maxnum=x         x+=1     return maxnum  print "program output" indexofmax = largestelementindex([1, 4, 3, 3, 2]) print 'index of max value is',indexofmax 

you need store largest number index:

def largestelementindex(lst):     x=0     maxnum=0     maxindex=0      while x < len(lst):         if lst[x] > maxnum:             maxindex=x             maxnum=lst[x]         x+=1     return maxindex 

i'd use for loop:

def largestelementindex(lst):     max_index = 0     max_value = lst[0]      index, value in enumerate(lst)         if value > max_value:             max_index = index             max_value = value      return max_index 

to max, use enumerate same way:

max_index = max(enumerate(lst), key=lambda pair: pair[1])[0]