python run another python script
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Title: Running Another Python Script in Python: A Step-by-Step Tutorial
Introduction:
In Python, it's common to have projects spread across multiple files or modules. At times, you may need to execute one Python script from another. This tutorial will guide you through the process of running another Python script within your Python program.
Step 1: Create the Target Python Script
Let's start by creating a simple Python script that we'll later run from another script. Create a file named target_script.py with the following content:
This script defines a function print_hello() that prints a message when the script is executed directly.
Step 2: Run Another Python Script
Now, let's create a script that will run target_script.py. Create a new file named main_script.py:
In this script, we use the subprocess module, which allows us to spawn new processes, to run target_script.py. The subprocess.run() function takes a list of arguments, where the first argument is the command to be executed ("python" in this case), and the subsequent arguments are the script name and any additional command-line arguments.
Step 3: Execute the Main Script
To execute the main script and see the result, run the following command in your terminal or command prompt:
You should see the output:
Congratulations! You have successfully run another Python script from your main Python script.
Conclusion:
Running one Python script from another can be achieved using the subprocess module. This tutorial demonstrated a simple example of invoking a target script (target_script.py) from a main script (main_script.py). Feel free to adapt these examples to fit your specific use case and explore additional features of the subprocess module for more advanced scenarios.
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