||Dictionary lookup object.|
Implements all methods and operations of
collections.MutableMappingas well as dict’s
copy. Also provides
All keys are expected to be strings. The structure remembers the case of the last key to be set, and
iteritems()will contain case-sensitive keys. However, querying and contains testing is case insensitive:
cid = CaseInsensitiveDict() cid['Accept'] = 'application/json' cid['aCCEPT'] == 'application/json' # True list(cid) == ['Accept'] # True
headers['content-encoding']will return the value of a
'Content-Encoding'response header, regardless of how the header name was originally stored.
If the constructor,
.update, or equality comparison operations are given keys that have equal ``.lower()``s, the behavior is undefined.
Like iteritems(), but with all lowercase keys.