urllib mock does not return HTTPMessage for response.headers

[sarayourfriend]

Pook's urllib mock returns a dict for headers, whereas the standard library implementation always returns an HTTPMessage. The docs here say they return an email.message.Message, of which HTTPMessage is a subclass.

This is true for Pythons 3.9 through to 3.13 (the currently supported range):

Python 3.9.19 (main, Apr 15 2024, 18:17:55) 
[Clang 17.0.6 ] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from urllib.request import urlopen
>>> response = urlopen("https://google.com")
>>> response.headers
<http.client.HTTPMessage object at 0x7f7a106ab070>

Python 3.13.0 (main, Oct 15 2024, 18:13:10) [GCC 14.2.1 20240912 (Red Hat 14.2.1-3)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from urllib.request import urlopen
>>> response = urlopen("https://google.com")
>>> response.headers
<http.client.HTTPMessage object at 0x7fd4b9dbf100>