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#21991: make headerregistry params property MappingProxyType.

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It is unlikely anyone is using the fact that the dictionary returned
by the 'params' attribute was previously writable, but even if someone
is the API is provisional so this kind of change is acceptable (and
needed, to get the API "right" before it becomes official).

Patch by Stéphane Wirtel.
This commit is contained in:
R David Murray 2014-10-17 19:30:13 -04:00
parent d696732025
commit 685b3495e1
3 changed files with 9 additions and 1 deletions
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3
Lib/email/headerregistry.py
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@ -7,6 +7,7 @@ Eventually HeaderRegistry will be a public API, but it isn't yet,
and will probably change some before that happens.
"""
from types import MappingProxyType
from email import utils
from email import errors
@ -454,7 +455,7 @@ class ParameterizedMIMEHeader:
@property
def params(self):
return self._params.copy()
return MappingProxyType(self._params)
class ContentTypeHeader(ParameterizedMIMEHeader):