Hy @puskini Welcome to the forum.
Yes, you can call a function inside another function. And that is a fundamental principle of programming:
Look at the following code:
print("I'm function one")
print("I'm function two")
Here you have two functions that have a print statement. The second one calls the first one inside the function.
On the last line you call the second function. If you now run this little program it will call the second function first and then from inside it the first function. So you will have the following output:
I'm function two
I'm function one