| 12345678910111213141516171819202122232425262728 |
- from typing import Any, List, NamedTuple, Optional, Union
- __all__ = ["Path"]
- class Path(NamedTuple):
- """A generic path of string or integer indices"""
- prev: Any # Optional['Path'] (python/mypy/issues/731)
- """path with the previous indices"""
- key: Union[str, int]
- """current index in the path (string or integer)"""
- typename: Optional[str]
- """name of the parent type to avoid path ambiguity"""
- def add_key(self, key: Union[str, int], typename: Optional[str] = None) -> "Path":
- """Return a new Path containing the given key."""
- return Path(self, key, typename)
- def as_list(self) -> List[Union[str, int]]:
- """Return a list of the path keys."""
- flattened: List[Union[str, int]] = []
- append = flattened.append
- curr: Path = self
- while curr:
- append(curr.key)
- curr = curr.prev
- return flattened[::-1]
|
