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"""
This module implements a standard dict and list alternatives, which can dynamically rename its keys replacing `-` with `_`.
They persist in nested data structes, meaning that if you try to obtain a dict from Renamed variant, you will actually
get RenamedDict back instead.
Usage:
d = dict()
l = list()
rd = renamed(d)
rl = renamed(l)
assert isinstance(rd, Renamed) == True
assert l = rl.original()
"""
from abc import ABC, abstractmethod # pylint: disable=[no-name-in-module]
from typing import Any, Dict, List, TypeVar
class Renamed(ABC):
@abstractmethod
def original(self) -> Any:
"""
Returns a data structure, which is the source without dynamic renamings
"""
@staticmethod
def map_public_to_private(name: Any) -> Any:
if isinstance(name, str):
return name.replace("_", "-")
return name
@staticmethod
def map_private_to_public(name: Any) -> Any:
if isinstance(name, str):
return name.replace("-", "_")
return name
K = TypeVar("K")
V = TypeVar("V")
class RenamedDict(Dict[K, V], Renamed):
def keys(self) -> Any:
keys = super().keys()
return {Renamed.map_private_to_public(key) for key in keys}
def __getitem__(self, key: K) -> V:
key = Renamed.map_public_to_private(key)
res = super().__getitem__(key)
return renamed(res)
def __setitem__(self, key: K, value: V) -> None:
key = Renamed.map_public_to_private(key)
return super().__setitem__(key, value)
def __contains__(self, key: object) -> bool:
key = Renamed.map_public_to_private(key)
return super().__contains__(key)
def items(self) -> Any:
for k, v in super().items():
yield Renamed.map_private_to_public(k), renamed(v)
def original(self) -> Dict[K, V]:
return dict(super().items())
class RenamedList(List[V], Renamed): # type: ignore
def __getitem__(self, key: Any) -> Any:
res = super().__getitem__(key)
return renamed(res)
def original(self) -> Any:
return list(super().__iter__())
def renamed(obj: Any) -> Any:
if isinstance(obj, dict):
return RenamedDict(**obj)
elif isinstance(obj, list):
return RenamedList(obj)
else:
return obj
__all__ = ["renamed", "Renamed"]
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