How to get current CPU and RAM usage in Python?

Question

What\'s your preferred way of getting current system status (current CPU, RAM, free disk space, etc.) in Python? Bonus points for *nix and Windows platforms.

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Answer 1

I feel like these answers were written for Python 2, and in any case nobody's made mention of the standard resource package that's available for Python 3. It provides commands for obtaining the resource limits of a given process (the calling Python process by default). This isn't the same as getting the current usage of resources by the system as a whole, but it could solve some of the same problems like e.g. "I want to make sure I only use X much RAM with this script."