How to Ensure a Single Instance of a Python Program Simultaneously?

Ensuring a Unique Program Instance

You may encounter a scenario where you desire to limit the execution of your Python program to a single instance. This could arise when managing sensitive data or preventing resource conflicts. Here's a common question and solution regarding this topic:

Is there a Pythonic way to guarantee only one instance of my program is running simultaneously?

Solution:

A cross-platform solution can be achieved using the tendo library's Singleton class. Here's an example:

<code class="python">from tendo import singleton
me = singleton.SingleInstance() # exits if another instance is detected</code>

The Singleton class will prevent multiple instances from running by attempting to bind to a specific port. If another instance is already running, it will gracefully exit the current attempt.

Installation:

You can install tendo through various methods:

• easy_install tendo
• pip install tendo
• Download from PyPI: http://pypi.python.org/pypi/tendo

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