pass Statement

One Python statement not found in C is the pass statement. Because Python does not use curly braces to delimit blocks of code, there are places where code is syntactically required. We do not have the equivalent empty braces or single semicolon the way C has to indicate “do nothing.” If you use a Python statement that expects a sub-block of code or suite, and one is not present, you will get a syntax error condition. For this reason, we have pass, a statement that does absolutely nothing—it is a true NOP, to steal the “No OPeration” assembly code jargon. Style- and development-wise, pass is also useful in places where your code will eventually go, but has not been written yet

Example

def foo_func():
    pass

OR

if user_choice == 'do_calc':
    pass
else:
    pass