Sometimes, it’s useful to branch the behaviour of your code based on the version of a package that you have installed. This may be to support an upgrade in your project, or for your own package to support different versions of a dependency.

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Adam Johnson

Python's importlib.metadata.version() function provides a reliable way to check installed package versions programmatically, returning version strings that can be compared directly or parsed using the packaging library's Version class for more sophisticated version comparisons. This approach is more reliable than using package-specific version attributes like __version__ since it reads directly from package metadata.

Python: check a package version with importlib.metadata.version()