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Loosen some types to avoid pain in real-life situations (#4870)

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In this diff:
* Loosen `set.__[i]sub__()` to allow typical use cases (that work at runtime). Namely, allow removing `unicode` from a set of `str`, and allow removing optional values from non-optional sets.
* Avoid using union return types in `cryptography` deserialization functions.
* Tune `SupportsItems` so that `dict` implements it on Python 2.

Co-authored-by: Ivan Levkivskyi <ilevkivskyi@dropbox.com>
This commit is contained in:
Ivan Levkivskyi
2020-12-29 18:31:14 +00:00
committed by GitHub
parent 1ae3158174
commit fb753c4226
5 changed files with 29 additions and 13 deletions
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12
third_party/2and3/cryptography/hazmat/primitives/serialization/__init__.pyi vendored
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@@ -1,6 +1,6 @@
from abc import ABCMeta
from enum import Enum
from typing import Optional, Union
from typing import Any, Optional, Union
from cryptography.hazmat.backends.interfaces import (
DERSerializationBackend,
@@ -17,19 +17,19 @@ from cryptography.hazmat.primitives.asymmetric.rsa import RSAPrivateKey, RSAPubl
def load_pem_private_key(
data: bytes, password: Optional[bytes], backend: Optional[PEMSerializationBackend] = ...
) -> Union[RSAPrivateKey, DSAPrivateKey, DHPrivateKey, EllipticCurvePrivateKey]: ...
) -> Any: ... # actually Union[RSAPrivateKey, DSAPrivateKey, DHPrivateKey, EllipticCurvePrivateKey]
def load_pem_public_key(
data: bytes, backend: Optional[PEMSerializationBackend] = ...
) -> Union[RSAPublicKey, DSAPublicKey, DHPublicKey, EllipticCurvePublicKey]: ...
) -> Any: ... # actually Union[RSAPublicKey, DSAPublicKey, DHPublicKey, EllipticCurvePublicKey]
def load_der_private_key(
data: bytes, password: Optional[bytes], backend: Optional[DERSerializationBackend] = ...
) -> Union[RSAPrivateKey, DSAPrivateKey, DHPrivateKey, EllipticCurvePrivateKey]: ...
) -> Any: ... # actually Union[RSAPrivateKey, DSAPrivateKey, DHPrivateKey, EllipticCurvePrivateKey]
def load_der_public_key(
data: bytes, backend: Optional[DERSerializationBackend] = ...
) -> Union[RSAPublicKey, DSAPublicKey, DHPublicKey, EllipticCurvePublicKey]: ...
) -> Any: ... # actually Union[RSAPublicKey, DSAPublicKey, DHPublicKey, EllipticCurvePublicKey]
def load_ssh_public_key(
data: bytes, backend: Union[RSABackend, DSABackend, EllipticCurveBackend, None]
) -> Union[RSAPublicKey, DSAPublicKey, DHPublicKey, EllipticCurvePublicKey, Ed25519PublicKey]: ...
) -> Any: ... # actually Union[RSAPublicKey, DSAPublicKey, DHPublicKey, EllipticCurvePublicKey, Ed25519PublicKey]
class Encoding(Enum):
PEM: str