How do I run another script, inside my main script

Question

I don't know how to run another script inside my main Python script. For example:

Index.py:

 Category = "math"
 Print (Category)
 Print ("You can use a calculator")
 Print ("What is 43.5 * 7")
 #run calculator.py
 Answer = int(input("What is your answer"))

How do I run my calculator script inside of this without having to write the calculator code inside of my index script?

Answer 1

Since your other "script" is a python module (.py file) you can import the function you want to run:

index.py:

from calculator import multiply # Import multiply function from calculator.py
category = "math"
print(category)
print("You can use a calculator")
print("What is 43.5 * 7")
#run calculator.py
real_answer = multiply(43.5, 7)
answer = int(input("What is your answer"))

calculator.py

def multiply(a, b)
 return a * b

Answer 2

You need to use execfile, and the sintax are available on: https://docs.python.org/2/library/functions.html#execfile. Example:

execfile("calculator.py")

If you using are Python 3.x, Use this folowing code:

with open('calculator.py') as calcFile:
 exec(calcFile.read())

PS: You should consider use the import statement, because is more simple and useful