MRO tools

Various cli tools related to MRO. Useful for debugging complex class strictures.

• Free software: MIT license
• GitHub: https://github.com/miki725/mro-tools

Installing

You can install mro-tools using pip:

$ pip install mro-tools

Why?

Inheritance is wonderful. Except when its not. How many times did you have to debug a complex class with MRO of >30 classes? You will then know its not pleasant. Editors don't help much since as soon you jump to a base class, all editor inheritance calculations are relative to the jumped class, not the original subclass. That makes it non-trivial to see what actually happens within code execution without dropping into pdb. This package aims to aid with such issues. It has a collection of cli tools which help troubleshooting complex classes with big MRO trees.

Using

MRO tools exposes all tools via a single group command. All available commands can be seen by executing mro-tools command:

❯❯❯ mro-tools
Usage: mro-tools [OPTIONS] COMMAND [ARGS]...

Options:
  --help  Show this message and exit.

Commands:
  method  Get all method definitions within all classes...
  version  Print version of mro-tools

Each sub-command has more documentation:

❯❯❯ mro-tools version --help
Usage: mro-tools version [OPTIONS]

  Print version of mro-tools

Options:
  --help  Show this message and exit.

mro-tools can also be accessed as a Python module:

❯❯❯ python -m mro_tools

Examples

❯❯❯ python -m mro_tools method django.views.generic:FormView.get_context_data
========
Full MRO
========
django.views.generic.edit.FormView
django.views.generic.base.TemplateResponseMixin
django.views.generic.edit.BaseFormView
django.views.generic.edit.FormMixin
django.views.generic.base.ContextMixin
django.views.generic.edit.ProcessFormView
django.views.generic.base.View
builtins.object

----------------------------------------------------
django.views.generic.edit.FormMixin.get_context_data
----------------------------------------------------
def get_context_data(self, **kwargs):
    """Insert the form into the context dict."""
    if 'form' not in kwargs:
        kwargs['form'] = self.get_form()
    return super().get_context_data(**kwargs)

-------------------------------------------------------
django.views.generic.base.ContextMixin.get_context_data
-------------------------------------------------------
def get_context_data(self, **kwargs):
    if 'view' not in kwargs:
        kwargs['view'] = self
    if self.extra_context is not None:
        kwargs.update(self.extra_context)
    return kwargs