Python For Loop List Interesting Result

Question

a = [0,1,2,3,4,5]
for b in a:
  print \":\"+str(b)
  a.pop(0)

Thinking that this would work in order going through the entire list and all its items I

Answer 1

If you want to use .pop() in a loop, a common idiom is to use it with while:

a = [0,1,2,3,4,5]
while a:
  print ":{}".format(a.pop(0))

Or, if you want the printed pattern you have there:

a = [0,1,2,3,4,5]
while a:
    print ":{}\n{}".format(a[0],a.pop(0))

prints

:0
0
:1
1
:2
2
:3
3
:4
4
:5
5