gistfile1.txt

>>> import dis
>>> def x():
...     print(True)
... 
>>> dis.dis(x)
  2           0 LOAD_GLOBAL              0 (True)
              3 PRINT_ITEM          
              4 PRINT_NEWLINE       
              5 LOAD_CONST               0 (None)
              8 RETURN_VALUE        
>>> def x():
...     print(foo)
... 
>>> dis.dis(x)
  2           0 LOAD_GLOBAL              0 (foo)
              3 PRINT_ITEM          
              4 PRINT_NEWLINE       
              5 LOAD_CONST               0 (None)
              8 RETURN_VALUE