How do we set multiple breakpoints in Python using IPython, so that for example we stop at line 4 and line 100?
Also, can we change our mind and set extra breakpoints while already in debugging?
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Possible duplicate of Breakpoint-induced interactive debugging of Python with IPythonAjeet Shah– Ajeet Shah2016-05-25 12:00:44 +00:00Commented May 25, 2016 at 12:00
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1The question you mentioned seems to allow either only 1 breakpoint, either stepping line by line. I am interested in stopping at multiple locations, skipping the rest in between.Kenny– Kenny2016-05-25 12:30:05 +00:00Commented May 25, 2016 at 12:30
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1 Answer
iPython provides IPython.core.debugger.Tracer debugger class which can be used to debugging.
Let's say I have below code written in myScript.py:
from IPython.core.debugger import Tracer
zz = Tracer()
print "iPython"
zz()
print "is a"
print "command shell"
zz()
print "for"
print "interactive computing"
print "in"
print "multiple programming languages"
print "including"
print "Python"
As you can see I have set 2 breakpoints in the script from the beginning at Line 5 and 8. Below, I am running this script and will be setting 2 more breakpoints at line 12 & 13.
$ ipython myScript.py
iPython
> /home/user/Documents/myScript.py(6)<module>()
4 print "iPython"
5 zz()
----> 6 print "is a"
7 print "command shell"
8 zz()
ipdb> break 12
Breakpoint 1 at /home/user/Documents/myScript.py:12
ipdb> break 13
Breakpoint 2 at /home/user/Documents/myScript.py:13
Also, when inside debugging, you can use commands c for continue and n for next step. Hopefully, it helps you.
1 Comment
Kenny
Thanks. What seems strange for me is why such a common language misses something such fundamental of a debugger and noone seems to bat an eye from what I googled.