Call Python function from another Python file

Hello friends, today we will learn how to call a function of a different Python file. In Python, you can use the functions of other Python files by using the import keyword. I will also tell you how you can import a single function instead of the entire file.

Call Python function from another Python file

Let’s take two Python files baseFile.py  and  callerFile.py. (Both are in the same directory)

You can check it: Call Python function from a different directory’s Python file

‘baseFile.py

def intro():
    return 'This is baseFile'

def secFun():
    return 'This is second function'

callerFile.py

import baseFile as b
print(b.intro())

Output:

This is baseFile

In my baseFile.py I have created two functions intro and secFun. I can use these functions from another Python file as well, which will help me keep my code clean and understandable. In the callerFile.py, I have imported the baseFile with an alias b. This enabled me to create an object for baseFile.py. Now I can use methods  baseFile.py by calling them in the other file.

Another way to import a file is by using a * in the import statement. * is a wild card symbol that is used to import all classes, functions, and variables present in the Python file.

from baseFile import *

Here, the import statement is different from the previous one but they both do the same thing.

Import only the function you want

In some cases, you want a specific function. There is no need to import the whole file, just import the specific function alone. For example, I want to use the secFun only, while importing I will import the secFun only.

callerFile.py

from baseFile import secFun
print(secFun())

Output:

This is Second class

I hope you got the idea of using functions, functions of a class from other Python files.