django core management error

[brian-methodical]

When running custom admin management command getting unexpected error "

'NoneType' object has no attribute 'endswith'

Here is the stack-trace:

`

Traceback (most recent call last):
  File "/Users/brianray/GitHub/methodical-feature-space/fserve/./manage.py", line 21, in <module>
    main()
  File "/Users/brianray/GitHub/methodical-feature-space/fserve/./manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "/opt/anaconda3/lib/python3.9/site-packages/django/core/management/__init__.py", line 446, in execute_from_command_line
    utility.execute()
  File "/opt/anaconda3/lib/python3.9/site-packages/django/core/management/__init__.py", line 440, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/opt/anaconda3/lib/python3.9/site-packages/django/core/management/base.py", line 414, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/opt/anaconda3/lib/python3.9/site-packages/django/core/management/base.py", line 460, in execute
    output = self.handle(*args, **options)
  File "/Users/brianray/GitHub/methodical-feature-space/fserve/ftasks/management/commands/dumpurls.py", line 15, in handle
    self.stdout.write(pprint.pprint(urls))
  File "/opt/anaconda3/lib/python3.9/site-packages/django/core/management/base.py", line 169, in write
    if ending and not msg.endswith(ending):
AttributeError: 'NoneType' object has no attribute 'endswith'

`

To reproduce take this code:

`

from django.core.management.base import BaseCommand
from django.urls import get_resolver
import pprint

class Command(BaseCommand):
    help = 'dumps all the endpoint urls'


    def handle(self, *args, **options):
        urls = {pat.name: str(pat.pattern._route) for pat in get_resolver().url_patterns 
                if getattr(pat, "name", None)}

        self.stdout.write(self.style.SUCCESS('Here are the urls: \n\n'))

        self.stdout.write(pprint.pprint(urls))
        self.stdout.write("\n")
        return True

`

put into {BASE}/{module}/management/commands ...

Django==4.0.5

[Simon Charette]

Traceback clearly points at the self.stdout.write(pprint.pprint(urls)) call being the origin of the issue.

pprint.pprint ​returns None, self.stdout.write expects a string, and the error messages clears state 'NoneType' object has no attribute 'endswith'.

Please avoid using this ticket tracker unless you have confirmed this is an issue with Django through TicketClosingReasons/UseSupportChannels.