How to Run One Python Script From Another

In this guide, I’ll show you how to run one Python script from another Python script.

More specifically, I’ll review the steps to:

  • Run one Python script from another
  • Call a specific variable from one Python script to another

But before we begin, here is a simple template that you may use to run one Python script from another (for Python scripts that are stored in the same folder):

import your_script_name_to_call

Steps to Run One Python Script From Another

Step 1: Place the Python Scripts in the Same Folder

To start, you’ll need to place your Python scripts in the same folder.

For example, I placed two Python scripts (called python_1 and python_2) in the same folder as below:

Place 2 scripts in a folder

The ultimate goal is to run the python_2 script from the python_1 script.

Step 2: Add the Syntax

Next, add the syntax to each of your scripts.

For instance, I added the following syntax under the python_1 script:

import python_2

print ('what are you up to?')

Where:

  • The first line of ‘import python_2’ in the python_1 script, would call the second python_2 script. Whenever you want to run one Python script from another, you’ll need to import the exact name of the Python script that you’d like to call
  • The second part of the code simply prints the expression of ‘what are you up to?’

How to Run One Python Script From Another

Now let’s add the syntax under the python_2 script:

print ('hello world')

In this case, the expression of ‘hello world’ would be printed when running the second script.

Print in Python

Note that you must first save the syntax that was captured in the python_2 script before calling it from another script:

Save script

Step 3: Run One Python Script From Another

Now you’ll need to run the script from the python_1 box in order to call the second script:

How to Run One Python Script From Another

Notice that the results of the python_2 script would be displayed first, and only then the results of the python_1 script would be displayed:

Print in Python

Call a Specific Variable from One Python Script to Another

Let’s now see how to call a specific variable (which we will call ‘x’) from the python_2 script into the python_1 script.

In that case, you’ll need to edit the syntax under the python_1 script to the following:

from python_2 import x

print (x)

So the python_1 script would now look like this:

Run One Python Script From Another Python Script

Next, assign a value (e.g., ‘hello world’) to the x variable in the python_2 script:

x = 'hello world'

So the python_2 script would now look like this:

variable in Python

Don’t forget to save the changes in the python_2 script:

Save Python script

Finally, run the syntax from the python_1 script:

Run One Python Script From Another Python Script

The ‘hello world’ expression would now get printed:

hello world python

Interaction of Variables from the Two Scripts

In the final section of this guide, you’ll see how variables from the two scripts may interact.

For example, let’s suppose that the python_1 script has the variable of y = 2, while the python_2 script has the variable of x = 5. The goal is to sum those two variables and display the results.

First, modify syntax under the python_1 script to the following:

from python_2 import x

y = 2

print (x + y)

Your python_1 script would now look like this:

Run One Python Script From Another Python Script

Then, change the syntax in the python_2 script to:

x = 5

So your python_2 script would now look like this:

Variable in Python

As before, don’t forget to save the changes in the python_2 script:

Save script

Finally, run the syntax from the python_1 script:

Run One Python Script From Another Python Script

You’ll then get ‘7’ which is indeed the sum of the two variables:

Print in python