Simple, small, interactive, console-based debugger.
Simple, small, interactive, console-based Python debugger.
- Django compatibile
KRT inherits from basic python debugger (called bdb). The main reason behind development of package was need of user interface during python script debugging in console (or when graphical interface is not available). Although pdb have the same (and propbably much more) functionality, I found it not so “user friendly”.
Install using pip.
pip install krt
Basic script debugging
python krt.py script.py # or python -m krt script.py
Initializing debugger during program execution
This method of initialization allows initialization at specific line.
import krt def func(_something, _nothing): local_var = [1, 2, 3, 4] # now, initialize krt krt.trace() anything = _somethins + _nothing return anything
Initializing krt via decorator. This method will initialize krt at 1st line of decorated method or function.
import krt # initialize krt @krt.debug() def func(_something, _nothing): local_var = [1, 2, 3, 4] anything = _somethins + _nothing return anything
One can use methods mentioned above, but method below allows krt triggering only if run with pre-defined django command.
Setting up django command
- Inside django applicaiton directory, create directory called management, inside which create directory commands. Following path, must exists django_project/application/management/commands/.
- Create __init__.py inside management and commands directories.
- Inside directory commands, create file <command>.py, where <command> will be used with manage.py. Let’s say that we’ve used krt_runserver.py.
- Insert into created file: ```python from django.core.management.base import BaseCommand from django.core.management.commands import runserver
class Command(runserver.Command): help = “Sets trigger for krt decorators” def __init__(self, *args, **kwargs): from django.conf import settings setattr(settings, 'krt_django_decorator_trigger_flag', True) super(Command, self).__init__(*args, **kwargs)
Use decorator inside view
Decorator, when used in django project, requires setting of keyword argument django to True. If the django argument is omitted, the debugger will be always initialized!
from django.http import HttpResponse from krttest.krt import debug @debug(django=True) def index(request): return HttpResponse("I'm ok.")
Now, when the django server is run with created command, KRT debugger is being initialized on 1st line of view, otherwise the decorators are being ignored.
python ./manage.py krt_runserver