module types_linq.lookup¶
class Lookup[TKey_co, TValue_co]¶
from types_linq.lookup import Lookup
A lookup is a one-to-many dictionary. It maps keys to Enumerable sequences of values.
Users should not construct instances of this class directly. Use Enumerable.to_lookup()
instead.
Bases¶
Enumerable[Grouping[TKey_co, TValue_co]]
Members¶
instancemethod __contains__(value)¶
- Parameters
value (
object)
- Returns
bool
Tests whether key is in the lookup.
instancemethod __getitem__(key)¶
- Parameters
key (
TKey_co)
- Returns
Enumerable[TValue_co]
Gets the collection of values indexed by the specified key, or empty if no such key exists.
instancemethod apply_result_selector[TResult](result_selector)¶
- Parameters
result_selector (
Callable[[TKey_co, Enumerable[TValue_co]], TResult])
- Returns
Enumerable[TResult]
Applies a transform function to each key and its associated values, then returns the results.
instancemethod contains(value)¶
- Parameters
value (
object)
- Returns
bool
Tests whether key is in the lookup.