try-except inside a loop

Question

I need to invoke method f. If it raises an IOError, I need to invoke it again (retry), and do it at most three times. I need to log any other excep

Answer 1

Use try .. except .. else:

for i in range(3, 0, -1):
  try:
    f()
  except IOError:
    if i == 1:
      raise
    print('retry')
  else:
    break

You should not generically catch all errors. Just let them bubble up to the appropriate handler.