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from __future__ import annotations import logging import os from typing import ClassVar class TypeData: def __init__(self, default_type, as_type) -> None: self.default_type = default_type self.as_type = as_type def __repr__(self) -> str: return f"{self.__class__.__name__}(base={self.default_type}, as={self.as_type})" def convert(self, value): return self.default_type(value) class BoolType(TypeData): BOOLEAN_STATES: ClassVar[dict[str, bool]] = { "1": True, "yes": True, "true": True, "on": True, "0": False, "no": False, "false": False, "off": False, } def convert(self, value): if value.lower() not in self.BOOLEAN_STATES: msg = f"Not a boolean: {value}" raise ValueError(msg) return self.BOOLEAN_STATES[value.lower()] class NoneType(TypeData): def convert(self, value): if not value: return None return str(value) class ListType(TypeData): def _validate(self): """no op.""" def convert(self, value, flatten=True): # noqa: ARG002, FBT002 values = self.split_values(value) result = [] for a_value in values: sub_values = a_value.split(os.pathsep) result.extend(sub_values) return [self.as_type(i) for i in result] def split_values(self, value): """ Split the provided value into a list. First this is done by newlines. If there were no newlines in the text, then we next try to split by comma. """ if isinstance(value, (str, bytes)): # Use `splitlines` rather than a custom check for whether there is # more than one line. This ensures that the full `splitlines()` # logic is supported here. values = value.splitlines() if len(values) <= 1: values = value.split(",") values = filter(None, [x.strip() for x in values]) else: values = list(value) return values def convert(value, as_type, source): """Convert the value as a given type where the value comes from the given source.""" try: return as_type.convert(value) except Exception as exception: logging.warning("%s failed to convert %r as %r because %r", source, value, as_type, exception) raise _CONVERT = {bool: BoolType, type(None): NoneType, list: ListType} def get_type(action): default_type = type(action.default) as_type = default_type if action.type is None else action.type return _CONVERT.get(default_type, TypeData)(default_type, as_type) __all__ = [ "convert", "get_type", ]
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