https://kfdani-001-site10.gtempurl.com/index.php?action=history&feed=atom&title=OpenSite%2FGuides%2FDebug_a_Python_scriptOpenSite/Guides/Debug a Python script - Revision history2026-10-30T01:48:09ZRevision history for this page on the wikiMediaWiki 1.46.2https://kfdani-001-site10.gtempurl.com/index.php?title=OpenSite/Guides/Debug_a_Python_script&diff=867&oldid=prevBathAfrica: Add rewritten practical lesson with steps, code and expected results2026-10-29T21:01:09Z<p>Add rewritten practical lesson with steps, code and expected results</p>
<p><b>New page</b></p><div>__NOTOC__<br />
{{OpenSite scope}}<br />
{{OpenSite lesson<br />
|id=opensite.help.debug-a-python-script<br />
|summary=Follow a short calculation through Python-line debugging and inspect a deliberate error.<br />
|prerequisites=The desktop Python workbench with Python enabled. Save a practice script; use the Debugger rather than the Console transcript to inspect a paused stack.<br />
|steps==== Prepare a small file ===<br />
{{Code|lang=python|code=<nowiki>lengths = [2.0, 3.0, 4.0]<br />
for length in lengths:<br />
squared = length * length<br />
print(length, squared)<br />
print("done")</nowiki>}}<br />
<br />
=== Start Debug file ===<br />
Use the workbench’s Debug file action. At a pause, inspect the stack and variables in the Debugger panel.<br />
<br />
=== Step through the loop ===<br />
Step into, over or out as appropriate. Watch <code>length</code> and <code>squared</code>. Current-file assistance and runtime debugging are separate features.<br />
<br />
=== Trace an intentional failure ===<br />
In a separate practice file, run <code>raise ValueError("practice failure")</code>. Read the traceback file and line. Script Output records the failure; debugger frame selection provides navigation.<br />
<br />
=== Stop and wait ===<br />
Stop requests interruption. Wait for the lane to become idle before running another script or property expression.<br />
<br />
|result=The loop produces (2, 4), (3, 9) and (4, 16). The error exercise identifies its own file/line without changing an engineering document.<br />
|limitations=The debugger steps Python lines, not native solver/library instructions. Native calls may keep running until they return; a Stop request is not proof of immediate interruption.<br />
}}<br />
<br />
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