Hasher Routines

class memcached2.HasherBase

Turn memcache keys into hashes, for use in server selection.

Normally, the python-memcached2 classes will automatically select a hasher to use. However, for special circumstances you may wish to use a different hasher or develop your own.

This is an abstract base class, here largely for documentation purposes. Hasher sub-classes such as HasherZero and HasherCMemcache, implement a hash method which does all the work.

See hash() for details of implementing a subclass.

hash(key)

Hash a key into a number.

This must persistently turn a string into the same value. That value is used to determine which server to use for this key.

Parameters:key (str) – memcache key Returns:int – Hashed version of key.

class memcached2.HasherZero

Hasher that always returns 0, useful only for SelectorFirst.

hash(key)

See memcached2.HasherBase.hash() for details of this function.

class memcached2.HasherCMemcache

Hasher compatible with the C memcache hash function.

hash(key)

See memcached2.HasherBase.hash() for details of this function.