uproot.LRUArrayCache

Defined in uproot.cache on line 168.

Inheritance order:

  1. uproot.LRUCache

  2. collections.abc.MutableMapping

  3. collections.abc.Mapping

  4. collections.abc.Collection

  5. collections.abc.Sized

  6. collections.abc.Iterable

  7. collections.abc.Container
class uproot.cache.LRUArrayCache(limit_bytes)
Parameters:

limit_bytes (None, int, or str) – Amount of data to allow in the cache before evicting the least-recently used. An integer is interpreted as a number of bytes and a string must be a number followed by a unit, such as “100 MB”. If None, this cache never evicts.

LRUArrayCache is a MutableMapping that evicts the least-recently used objects when the current number of bytes exceeds the limit. The size of an object is taken from its nbytes attribute. If it does not have an nbytes, it is presumed to have default_nbytes.

Get and set (or explicitly remove) items with MutableMapping syntax: square bracket subscripting.

LRUArrayCache is thread-safe for all options: getting, setting, deleting, iterating, listing keys, values, and items.

This cache is sensitive to the size of the objects it stores, but only if those objects have meaningful nbytes. It is therefore a better array_cache than an array_cache.

sizeof

Inherited from uproot.LRUCache.

classmethod LRUArrayCache.sizeof(what)

The “size of” an object in this cache is its

  • nbytes attribute/property if it has one (NumPy and Awkward Arrays, Pandas Series),

  • memory_usage().sum() if it exists (Pandas DataFrames),

  • default_nbytes otherwise.

limit

Inherited from uproot.LRUCache.

LRUArrayCache.limit

Number of bytes to allow in the cache before evicting the least-recently used. If None, this cache never evicts.

current

Inherited from uproot.LRUCache.

LRUArrayCache.current

Current number of bytes in the cache.

keys

Inherited from uproot.LRUCache.

LRUArrayCache.keys()

Returns a copy of the keys currently in the cache, in least-recently used order.

The list ascends from least-recently used to most-recently used: index 0 is the least-recently used and index -1 is the most-recently used.

(Calling this method does not change the order.)

values

Inherited from uproot.LRUCache.

LRUArrayCache.values()

Returns a copy of the values currently in the cache, in least-recently used order.

The list ascends from least-recently used to most-recently used: index 0 is the least-recently used and index -1 is the most-recently used.

(Calling this method does not change the order.)

items

Inherited from uproot.LRUCache.

LRUArrayCache.items()

Returns a copy of the items currently in the cache, in least-recently used order.

The list ascends from least-recently used to most-recently used: index 0 is the least-recently used and index -1 is the most-recently used.

(Calling this method does not change the order.)