tangingw / methodtools

Expand functools features(lru_cache) to class - methods, classmethods, staticmethods and even for (unofficial) hybrid methods.

methodtools

Expand functools features to methods, classmethods, staticmethods and even for (unofficial) hybrid methods.

For now, methodtools only provides methodtools.lru_cache.

Use methodtools module instead of functools module. Than it will work as you expected.

from methodtools import lru_cache

class A(object):

    # cached method. the storage lifetime follows `self` object
    @lru_cache()
    def cached_method(self, args):
        ...

    # cached classmethod. the storage lifetime follows `A` class
    @lru_cache()  # the order is important!
    @classmethod  # always lru_cache on top of classmethod
    def cached_classmethod(self, args):
        ...

    # cached staticmethod. the storage lifetime follows `A` class
    @lru_cache()  # the order is important!
    @staticmethod  # always lru_cache on top of staticmethod
    def cached_staticmethod(self, args):
        ...

@lru_cache()  # just same as functools.lru_cache
def cached_function():
    ...

Installation

PyPI is the recommended way.

$ pip install methodtools

To browse versions and tarballs, visit:

https://pypi.python.org/pypi/methodtools/

Note

If you are working on Python 2, install also functools32.

See also

• Documentation
• This project is derived from Ring, a rich cache interface using the same method handling technique.
• To learn more about bound method dispatching, see also wirerope.