LazyLoadDict

class LazyLoadDict(load_function, *args, **kwargs)

Bases: dict

LazyLoadDict is a custom dictionary class that defers data loading until it is first accessed, optimizing resource usage by delaying expensive initialization operations. It mimics the behavior of a standard Python dictionary while incorporating lazy loading functionality.

This makes it ideal for scenarios where loading data is expensive, and you want to defer the operation until it’s actually needed.

__init__(load_function, *args, **kwargs)

Initializes an instance with a function to load data, along with any additional arguments or keyword arguments.

Parameters

load_functionCallable or None

A function responsible for loading the data. The function should return a dictionary or a list or tuples representing the dictionary. If None, the data is assumed to be preloaded.

*args :

Additional positional arguments passed to the superclass.

**kwargs :

Additional keyword arguments passed to the superclass.

Attributes

_data_loadedbool

A flag indicating whether the data has already been loaded.

_load_functionCallable or None

The function used to load data. If None, no loading function is used.

Methods

__init__(load_function, *args, **kwargs)	Initializes an instance with a function to load data, along with any additional arguments or keyword arguments.
clear()
copy()
fromkeys(iterable[, value])	Create a new dictionary with keys from iterable and values set to value.
get(key)	Return the value for key if key is in the dictionary, else default.
items()
keys()
pop(k[,d])	If the key is not found, return the default if given; otherwise, raise a KeyError.
popitem()	Remove and return a (key, value) pair as a 2-tuple.
setdefault(key[, default])	Insert key with a value of default if key is not in the dictionary.
update([E, ]**F)	If E is present and has a .keys() method, then does: for k in E.keys(): D[k] = E[k] If E is present and lacks a .keys() method, then does: for k, v in E: D[k] = v In either case, this is followed by: for k in F: D[k] = F[k]
values()

clear() → None.  Remove all items from D.

copy() → a shallow copy of D

classmethod fromkeys(iterable, value=None, /)

Create a new dictionary with keys from iterable and values set to value.

get(key)

Return the value for key if key is in the dictionary, else default.

items() → a set-like object providing a view on D's items

keys() → a set-like object providing a view on D's keys

pop(k[, d]) → v, remove specified key and return the corresponding value.

If the key is not found, return the default if given; otherwise, raise a KeyError.

popitem()

Remove and return a (key, value) pair as a 2-tuple.

Pairs are returned in LIFO (last-in, first-out) order. Raises KeyError if the dict is empty.

setdefault(key, default=None, /)

Insert key with a value of default if key is not in the dictionary.

Return the value for key if key is in the dictionary, else default.

update([E, ]**F) → None.  Update D from mapping/iterable E and F.

If E is present and has a .keys() method, then does: for k in E.keys(): D[k] = E[k] If E is present and lacks a .keys() method, then does: for k, v in E: D[k] = v In either case, this is followed by: for k in F: D[k] = F[k]

values() → an object providing a view on D's values