>>> dis("""a = 'hello'
... try:
...     n = int(a)
... except:
...     pass
... """
... )
  1           0 LOAD_CONST               0 ('hello')
              2 STORE_NAME               0 (a)

  2           4 SETUP_FINALLY           12 (to 18)

  3           6 LOAD_NAME                1 (int)
              8 LOAD_NAME                0 (a)
             10 CALL_FUNCTION            1
             12 STORE_NAME               2 (n)
             14 POP_BLOCK
             16 JUMP_FORWARD            12 (to 30)

  4     >>   18 POP_TOP
             20 POP_TOP
             22 POP_TOP

  5          24 POP_EXCEPT
             26 JUMP_FORWARD             2 (to 30)
             28 RERAISE
        >>   30 LOAD_CONST               1 (None)
             32 RETURN_VALUE




>>> dis("""a = 'hello'
... if a.isdigit():
...     n = int(a)
... else:
...     pass
... """)
  1           0 LOAD_CONST               0 ('hello')
              2 STORE_NAME               0 (a)

  2           4 LOAD_NAME                0 (a)
              6 LOAD_METHOD              1 (isdigit)
              8 CALL_METHOD              0
             10 POP_JUMP_IF_FALSE       22

  3          12 LOAD_NAME                2 (int)
             14 LOAD_NAME                0 (a)
             16 CALL_FUNCTION            1
             18 STORE_NAME               3 (n)
             20 JUMP_FORWARD             0 (to 22)

  5     >>   22 LOAD_CONST               1 (None)
             24 RETURN_VALUE