usse/scrape/venv/lib/python3.10/site-packages/cattrs/_generics.py
2023-12-22 15:26:01 +01:00

23 lines
678 B
Python

from typing import Any, Mapping
from ._compat import copy_with, get_args, is_annotated, is_generic
def deep_copy_with(t, mapping: Mapping[str, Any]):
args = get_args(t)
rest = ()
if is_annotated(t) and args:
# If we're dealing with `Annotated`, we only map the first type parameter
rest = tuple(args[1:])
args = (args[0],)
new_args = (
tuple(
mapping[a.__name__]
if hasattr(a, "__name__") and a.__name__ in mapping
else (deep_copy_with(a, mapping) if is_generic(a) else a)
for a in args
)
+ rest
)
return copy_with(t, new_args) if new_args != args else t