What this snippet does
-C prints lines either side of each match, which is what makes a stack trace readable.
Expected output
File "app.py", line 42, in handler
Why practise typing this
Typing text processing code builds muscle memory for the symbols and indentation Linux 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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