Checklists for software errors, setup, and tool workflows.

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Latest checklists

You're processing a large text file in Python, and suddenly you hit a MemoryError

Fix Python Memory Error When Loading Large JSON Files
If you've tried to load a large JSON file into Python and hit a MemoryError, you...

Fix Firefox Secure Connection Failed Due to Proxy Settings
If you see "Secure Connection Failed" in Firefox and suspect a proxy is involved, you'...

Fix 'Permission Denied' When Activating Python venv
When you try to activate a Python virtual environment with source venv/bin/activate ...

Fix 'Python' Command Not Found on Windows 7
When you type python in Command Prompt on Windows 7 and get 'python' i...

How to Enable Chrome Extensions That Aren't Loading
You open Chrome and see a grayed-out extension icon. Clicking 'Enable' does nothing, or t...