In python when our program gets longer, we may want to split it into several files for easier maintenance.
we may also want to use a handy function that we written in several programs without copying its definition into each program.
To support this, Python has a way to put definitions in a file and use them in a script or in an interactive instance of the interpreter.
Such a file is called a module; definitions from a module can be imported into other modules or into the main module.
Create a file called module1.py with following code:
'''module demo'''
def sum(a,b):
ans=a+b
print("Sum is ", ans)
Now create another file called call_module.py file with following code:
'''calling a module'''
import module1
module1.sum(3,4)
Output:
('Sum is ', 7)
