insertion - Python "int is not subscriptable" error -

why isn't working? says int not subscriptable when run speedtest.

this error:

traceback (most recent call last):   file "<pyshell#3>", line 1, in <module>     speedtest()   file "\\internal.sloughgrammar.berks.sch.uk\students$\home\2014\14khandelwala\mydocs\year8\computing\raspberry pi\test_sort.py", line 14, in speedtest     insertion(a)   file "\\internal.sloughgrammar.berks.sch.uk\students$\home\2014\14khandelwala\mydocs\year8\computing\raspberry pi\test_sort.py", line 41, in insertion     val, j = 0[i], i-1 typeerror: 'int' object not subscriptable 

this code:

# test_sort.py random import * time import *  def speedtest():     print("*** bubble sort vs. insertion sort ***")     y in [2000, 4000, 8000]:         print("\narray of {} random numbers 0 999:".format(y))         = [randint(1,999) x in range(y)]         b = a[:]         tic = time()         insertion(a)         toc = time()         print("insertion sort: {} seconds.".format(str(round(toc-tic,1)).rjust(5)))         tic = time()         bubble(a)         toc = time()         print("bubble sort: {} seconds.".format(str(round(toc-tic,1)).rjust(5)))   def bubble(a):     """takes list , sorts it."""     j = len(a)     while true:         swap = false         j -= 1         k in range(j):             if a[k] > a[k+1]:                 a[k], a[k+1] = a[k+1], a[k]                 swap = true     if not swap:         return   # insertion_sort.py def insertion(a):     = [randint(1,999) x in range(y)]     """takes list , sorts using insertion sort."""     in range(1, len(a)):         val, j = 0[i], i-1         while j >= 0 , a[j] > val:             a[j+1] = a[j]             j -= 1         a[j+1] = val  

val, j = 0[i], i-1 

edit line , try instead -

val, j = a[i], i-1