https://training-course-material.com/index.php?action=history&feed=atom&title=Using_the_Python_Debugger_%28pdb%29Using the Python Debugger (pdb) - Revision history2026-05-14T01:01:33ZRevision history for this page on the wikiMediaWiki 1.45.1https://training-course-material.com/index.php?title=Using_the_Python_Debugger_(pdb)&diff=9265&oldid=prevKristian Rother: /* Tips */2013-02-08T00:03:24Z<p><span class="autocomment">Tips</span></p>
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== Interrupting program execution ==<br />
You can interrupt the program execution and start the debugger by inserting these commands at any point:<br />
<br />
<source lang="python"><br />
import pdb<br />
pdb.set_trace()<br />
</source><br />
<br />
The debugger shows a shell that works like the normal Python command line, but with some extra commands:<br />
* '''n''' (next) – execute next statement.<br />
* '''s''' (step) – execute next statement, and descend into functions.<br />
* '''l''' (list) – show source code.<br />
* '''c''' (continue) – continue execution until the next breakpoint.<br />
* '''help''' – print help message.<br />
* '''q''' (quit) – abort the program.<br />
<br />
== Breakpoints ==<br />
* The command ''''b <line number>'''' sets a breakpoint at the given line<br />
* The command ''''b'''' displays all breakpoints set<br />
== Tips ==<br />
* A valuable diagnostic tool is to use the debugger for manipulate variable values. e.g.:<br />
<br />
<source lang="python"><br />
>>> a = 1<br />
</source><br />
<br />
* Most IDE's are supporting the debugger. It is much more comfortable to control the program from there.<br />
* In the debugger command line you can get help on any command by typing ''''help <command>''''.</div>Kristian Rother