[Jupyter Notebook / Lab] 3 ways to debug on Jupyter [Pdb]
I want to debug on Jupyter
I want to stop trying to find the root of debugging by inserting a print statement and executing it over and over again.
--How to specify a breakpoint and debug --How to start the debugger when an error occurs --Applies only to specific cells --Applies to the entire notebook
I will introduce three methods.
Debugging to specify breakpoints
If you know the line you want to debug, Insert the following line between the lines you want to debug.
from IPython.core.debugger import Pdb; Pdb().set_trace()
Execution example
The following is an example of a break when ʻi becomes 10. You can certainly see ʻi = 10.
Debug when bugs occur
If you want to start Pdb when a bug occurs somewhere.
** If you want to apply only to a specific cell **, put the following row at the beginning of the cell.
%%debug
** If you want to apply it to the entire notebook **, put the following line somewhere.
%pdb on
# %pdb off ← When you want to turn off debug detection mode
Execution example
I'm intentionally raising an error when ʻi == 10`. The debugger is running properly.
Frequently used commands
Isn't it here? Please let me know if it is convenient.
| command | Description |
|---|---|
| w | Show stack trace(where) |
| n | Run until next line(next) |
| c | Continue execution until next breakpoint(continue) |
| q | Run to the end and finish(quit) |
| d | Dive into a function(down) |
| u | Get out of the function(up) |
| s | Execute until the next function call(step) |
| r | Run until the current function returns(return) |
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