Python runpy.run_path() Function: Usage and Examples

This guide explains runpy.run_path() function: usage and examples through a focused Python example. You will learn the behavior to expect, why it matters in a real program, and how to recognize the common mistakes before applying it in your own project.

What You Will Learn

runpy.run_path executes a Python source file from a path and returns its resulting globals. It is helpful for controlled scripts but is not a sandbox.

When and Why to Use It

The following example focuses on a practical use of runpy.run_path() Function: Usage and Examples.

Step-by-Step Example

import runpy
from pathlib import Path
from tempfile import TemporaryDirectory

with TemporaryDirectory() as directory:
    script_path = Path(directory) / "sample_script.py"
    script_path.write_text("result = 6 * 7\n", encoding="utf-8")
    resulting_globals = runpy.run_path(str(script_path))
    print(resulting_globals["result"])

Understanding the Example

The temporary script assigns result=42, and run_path exposes that name in its returned dictionary.

Expected Output

Important Behavior and Edge Cases

Only execute trusted script paths; executing a file through runpy grants it normal Python process privileges.

Try It Yourself

Create a script that calculates an area and retrieve its result from the returned namespace.

Common Beginner Mistakes

Only execute trusted script paths; executing a file through runpy grants it normal Python process privileges.
Assuming that an import has no initialization effects or that every environment resolves modules in the same way.
Skipping the practice step and assuming the example covers every input. Test at least one normal case and one edge case relevant to this topic.

Key Takeaways

runpy.run_path executes a Python source file from a path and returns its resulting globals.
The temporary script assigns result=42, and run_path exposes that name in its returned dictionary.
Apply the technique deliberately, checking its documented input requirements and failure behavior before integrating it into a larger project.