What is pass in Python

pass is the "no-op" statement in Python. It can be used in blocks where no action is to

be taken (or as a placeholder for code not yet implemented); it is only required

because Python uses whitespace to delimit blocks:

Eg:

if x < 0:

    print('negative!')

elif x == 0:

    # TODO: put something smart here

    pass

else:

    print('positive!')