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argparse: Use Literal for action & nargs add_argument parameter types #7329

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Merged
merged 2 commits into from
Feb 21, 2022
Merged

argparse: Use Literal for action & nargs add_argument parameter types #7329

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25ad2b2
argparse: Use Literal for action & nargs add_argument parameter types
not-my-profile Feb 20, 2022
e43176e
argparse: add |str to SUPPRESS type
not-my-profile Feb 20, 2022
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38 changes: 29 additions & 9 deletions stdlib/argparse.pyi
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Original file line number Diff line number Diff line change
@@ -1,5 +1,20 @@
import sys
from typing import IO, Any, Callable, Generator, Generic, Iterable, NoReturn, Pattern, Protocol, Sequence, TypeVar, overload
from typing import (
IO,
Any,
Callable,
Generator,
Generic,
Iterable,
NewType,
NoReturn,
Pattern,
Protocol,
Sequence,
TypeVar,
overload,
)
from typing_extensions import Literal

if sys.version_info >= (3, 9):
__all__ = [
Expand Down Expand Up @@ -48,12 +63,14 @@ _ActionT = TypeVar("_ActionT", bound=Action)
_ArgumentParserT = TypeVar("_ArgumentParserT", bound=ArgumentParser)
_N = TypeVar("_N")

ONE_OR_MORE: str
OPTIONAL: str
PARSER: str
REMAINDER: str
SUPPRESS: str
ZERO_OR_MORE: str
ONE_OR_MORE: Literal["+"]
OPTIONAL: Literal["?"]
PARSER: Literal["A..."]
REMAINDER: Literal["..."]
_SUPPRESS_T = NewType("_SUPPRESS_T", str)
SUPPRESS: _SUPPRESS_T | str # not using Literal because argparse sometimes compares SUPPRESS with is
# the | str is there so that foo = argparse.SUPPRESS; foo = "test" checks out in mypy
ZERO_OR_MORE: Literal["*"]
_UNRECOGNIZED_ARGS_ATTR: str # undocumented

class ArgumentError(Exception):
Expand Down Expand Up @@ -89,8 +106,11 @@ class _ActionsContainer:
def add_argument(
self,
*name_or_flags: str,
action: str | type[Action] = ...,
nargs: int | str = ...,
action: Literal[
"store", "store_const", "store_true", "store_false", "append", "append_const", "count", "help", "version", "extend"
]
| type[Action] = ...,
nargs: int | Literal["?", "*", "+", "...", "A...", "==SUPPRESS=="] | _SUPPRESS_T = ...,
const: Any = ...,
default: Any = ...,
type: Callable[[str], _T] | FileType = ...,
Expand Down