Python for-else relationship [duplicate]

Question

I can run the below python script without errors.

for n in range(3):
    print n
else:
    print "done"

But I am puzzled about the else without a matching if.
It does not make sense.
Can some one explain why this works ?

Answer 1

The else clause of for and while only executes if the loop exits normally, i.e. break is never run.

for i in range(20):
  print i
  if i == 3:
    break
else:
  print 'HAHA!'

And the else clause of try only executes if no exception happened.

try:
  a = 1 / 2
except ZeroDivisionError:
  do_something()
else:
  print '/golfclap'