I don’t understand why the repr should use \\r instead of \r.  It seems to work:

>>> from email.policy import Policy, HTTP, strict
>>> strict
Policy(raise_on_defect=True)
>>> eval(repr(strict))
Policy(raise_on_defect=True)
>>> HTTP
Policy(linesep='\r\n', max_line_length=None)
>>> eval(repr(HTTP))
Policy(linesep='\r\n', max_line_length=None)
>>> HTTP.__dict__
{'max_line_length': None, 'linesep': '\r\n'}
>>> eval(repr(HTTP)).__dict__
{'max_line_length': None, 'linesep': '\r\n'}