timing - Python can't implement timeit module -

this basic exercise. don't know hot implement timeit module correctly. keep recieving syntax errors

import timeit import random def bubblesort(laux):     in range(len(laux)):      exchange = false      j in range(len(laux)-1):          if laux[j] > laux[j+1]:              tmp = laux[j+1]              laux[j+1] = laux[j]              laux[j] = tmp              exchange = true     if not exchange:          break return(laux)  a=int(input("size of list: ")) lst = [0]*a in range(a):     lst[i] = random.randint(1,100) print(bubblesort(lst)) print(timeit.timeit() 

you seem have misinterpreted function of timeit.timeit - idea tell time, , times it. normally, thing you're timing many, many times, can meaningful average. means needs provide 'setup' argument, list should presumably different each test. refer examples in documentation if need - find they're easy enough suit purpose. i've implemented timeit below:

a=int(input("size of list: "))  n = 100000  setup = "lst = [random.randrange(100) _ in range(a)]" time = timeit.timeit("bubblesort(lst)", setup=setup, globals=globals(), number=n)  print("{} sorts took {}s".format(n, time)) 

of course, if you're using ipython can this:

in [1]: bubble import bubblesort  in [2]: random import randrange  in [3]: %timeit bubblesort([randrange(100) _ in range(50)]) 10000 loops, best of 3: 175 µs per loop 

maybe expecting timeit() tell how time has passed. if so, done using time module, quite simply.

import time  start_time = time.time() bubblesort(lst) time_taken = time.time() - start_time print("one sort took {}s".format(time_taken)) 

on note, i'd recommend using different name argument "laux". can see, so's syntax highlighting thinks it's class, starting capital letter class. laux doesn't particularly tell me outsider is, although can infer name bubblesort.