Hash Table

class npstructures.HashTable(keys, values, mod=None, key_dtype=None, value_dtype=None, safe_mode=True)

Enables dict-like lookup of values for a predefined set of integer keys

Provides fast lookup for a predefined set of keys. The set of keys must be unique values andcannot be modified after the creation of the HashTable. This is in contrast to dict, where the set of keys is mutable. Indexing both with a single index, or an array_like index is supported. See examples

Parameters:

keysarray_like or RaggedArray

The keys for the lookup

valuesarray_like or RaggedArray

The corresponding values

modint, optional

the modulo-value used to create the hashes

key_dtypeoptional

the datatype to use for keys. (Must be integer-type)

value_dtypeoptional

the datatype to use for the values

Examples

>>> table = HashTable([10, 19, 20, 100], [3.14, 2.87, 1.11, 0])
>>> table[[19, 100]]
array([2.87, 0.  ])

Attributes: