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Allow using a callable key on EntityDatabase

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This commit is contained in:
Lonami Exo 2017-10-12 19:54:23 +02:00
parent 16a0cecf46
commit f2338e49ae
1 changed files with 13 additions and 13 deletions
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26
telethon/tl/entity_database.py
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@ -125,8 +125,13 @@ class EntityDatabase:
def _parse_key(self, key):
"""Parses the given string, integer or TLObject key into a
marked user ID ready for use on self._entities. Raises
ValueError if it cannot be parsed.
marked user ID ready for use on self._entities.
If a callable key is given, the entity will be passed to the
function, and if it returns a true-like value, the marked ID
for such entity will be returned.
Raises ValueError if it cannot be parsed.
"""
if isinstance(key, str):
phone = EntityDatabase.parse_phone(key)
@ -144,20 +149,15 @@ class EntityDatabase:
if isinstance(key, TLObject):
return utils.get_peer_id(key, add_mark=True)
if callable(key):
for k, v in self._entities.items():
if key(v):
return k
raise ValueError()
def __getitem__(self, key):
"""Accepts a digit only string as phone number,
otherwise it's treated as an username.
If an integer is given, it's treated as the ID of the desired User.
The ID given won't try to be guessed as the ID of a chat or channel,
as there may be an user with that ID, and it would be unreliable.
If a Peer is given (PeerUser, PeerChat, PeerChannel),
its specific entity is retrieved as User, Chat or Channel.
Note that megagroups are channels with .megagroup = True.
"""
"""See the ._parse_key() docstring for possible values of the key"""
try:
return self._entities[self._parse_key(key)]
except (ValueError, KeyError) as e: