What this snippet does
The Global Interpreter Lock (GIL) prevents true parallel CPU execution in CPython threads, causing race conditions if unsynchronized.
Expected output
2000
Why practise typing this
Typing concurrency code builds muscle memory for the symbols and indentation Python uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.
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