How to Guarantee Single Instance Execution of a Python Program Using the tendo Package?

How to Ensure a Single Instance of a Python Program Runs

Original Question:

How can you enforce that only a single instance of a Python program executes concurrently?

Discussion:

Implementing this functionality in Python presents challenges, as methods like lock files fail due to potential program crashes.

Solution:

The tendo Python package provides a robust cross-platform solution through its SingleInstance class. Here's how you can leverage it:

<code class="python">from tendo import singleton

# Attempt to create a single instance
me = singleton.SingleInstance()

# If another instance is running, exit the current one
if me.is_running():
    sys.exit(-1)</code>

Installing tendo can be done with the following command:

pip install tendo

This solution ensures that only a single instance of your program runs and handles program failures gracefully.

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