#23551: Exception raised when using the bash autocompletion with Python 3
-----------------------------+--------------------
Reporter: marco-buttu | Owner: nobody
Type: Bug | Status: new
Component: Utilities | Version: master
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
-----------------------------+--------------------
My environment is Python 3.4 and Linux Mint 17. When using the django
autocompletion, a TAB-completion after a command gives me an exception.
For instance, typing a TAB after *django-admin startproject*:
{{{
$ django-admin startproject Traceback (most recent call last):
...
File ".../django/core/management/__init__.py", line 262, in autocomplete
options = sorted((k, v) for k, v in options if k.startswith(curr))
TypeError: unorderable types: bool() < NoneType()
}}}
That happens because at line 225 the *options* list is initilized as:
{{{
options = [('--help', None)]
}}}
and at line 263:
{{{
options = sorted((k, v) for k, v in options if k.startswith(curr))
}}}
But since *options* contains *--help* twice, in Python 3 we get an error
comparing a *bool* with *None*:
{{{
>>> sorted([('foo', True), ('--help', False), ('--help', None)])
Traceback (most recent call last):
...
TypeError: unorderable types: NoneType() < bool()
}}}
That obviously does not happen in Python 2. The doctring of
*autocomplete()* says:
{{{
>>> from django.core.management import ManagementUtility
>>> for line in
ManagementUtility.autocomplete.__doc__.splitlines()[10:15]:
... print(line)
...
Subcommand options are saved as pairs. A pair consists of
the long option string (e.g. '--exclude') and a boolean
value indicating if the option requires arguments. When
printing to
stdout, an equal sign is appended to options which require
arguments.
}}}
So, how come *options* is initialized with the pair *('--help', None)*
instead of *('--help', False)*?
--
Ticket URL: <https://code.djangoproject.com/ticket/23551>
Django <https://code.djangoproject.com/>
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