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[case testTryStarSimple]
try:
pass
except* Exception as e:
reveal_type(e) # N: Revealed type is "builtins.ExceptionGroup[builtins.Exception]"
[builtins fixtures/exception.pyi]
[case testTryStarMultiple]
try:
pass
except* Exception as e:
reveal_type(e) # N: Revealed type is "builtins.ExceptionGroup[builtins.Exception]"
except* RuntimeError as e:
reveal_type(e) # N: Revealed type is "builtins.ExceptionGroup[builtins.RuntimeError]"
[builtins fixtures/exception.pyi]
[case testTryStarBase]
try:
pass
except* BaseException as e:
reveal_type(e) # N: Revealed type is "builtins.BaseExceptionGroup[builtins.BaseException]"
[builtins fixtures/exception.pyi]
[case testTryStarTuple]
class Custom(Exception): ...
try:
pass
except* (RuntimeError, Custom) as e:
reveal_type(e) # N: Revealed type is "builtins.ExceptionGroup[Union[builtins.RuntimeError, __main__.Custom]]"
[builtins fixtures/exception.pyi]
[case testTryStarInvalidType]
class Bad: ...
try:
pass
except* (RuntimeError, Bad) as e: # E: Exception type must be derived from BaseException (or be a tuple of exception classes)
reveal_type(e) # N: Revealed type is "builtins.ExceptionGroup[Any]"
[builtins fixtures/exception.pyi]
[case testTryStarGroupInvalid]
try:
pass
except* ExceptionGroup as e: # E: Exception type in except* cannot derive from BaseExceptionGroup
reveal_type(e) # N: Revealed type is "builtins.ExceptionGroup[Any]"
[builtins fixtures/exception.pyi]
[case testTryStarGroupInvalidTuple]
try:
pass
except* (RuntimeError, ExceptionGroup) as e: # E: Exception type in except* cannot derive from BaseExceptionGroup
reveal_type(e) # N: Revealed type is "builtins.ExceptionGroup[Union[builtins.RuntimeError, Any]]"
[builtins fixtures/exception.pyi]
[case testBasicTypeVarTupleGeneric]
from typing import Generic, TypeVarTuple, Unpack
Ts = TypeVarTuple("Ts")
class Variadic(Generic[Unpack[Ts]]):
...
variadic: Variadic[int, str]
reveal_type(variadic) # N: Revealed type is "__main__.Variadic[builtins.int, builtins.str]"
[builtins fixtures/tuple.pyi]
[case testAsyncGeneratorWithinComprehension]
# flags: --python-version 3.11
from typing import Any, Generator, List
async def asynciter(iterable):
for x in iterable:
yield x
async def coro() -> Generator[List[Any], None, None]:
return ([i async for i in asynciter([0,j])] for j in [3, 5])
reveal_type(coro) # N: Revealed type is "def () -> typing.Coroutine[Any, Any, typing.Generator[builtins.list[Any], None, None]]"
[builtins fixtures/async_await.pyi]
[typing fixtures/typing-async.pyi]
[case testTypeVarTupleNewSyntaxAnnotations]
Ints = tuple[int, int, int]
x: tuple[str, *Ints]
reveal_type(x) # N: Revealed type is "tuple[builtins.str, builtins.int, builtins.int, builtins.int]"
y: tuple[int, *tuple[int, ...]]
reveal_type(y) # N: Revealed type is "tuple[builtins.int, Unpack[builtins.tuple[builtins.int, ...]]]"
[builtins fixtures/tuple.pyi]
[case testTypeVarTupleNewSyntaxGenerics]
from typing import Generic, TypeVar, TypeVarTuple
T = TypeVar("T")
Ts = TypeVarTuple("Ts")
class C(Generic[T, *Ts]):
attr: tuple[int, *Ts, str]
def test(self) -> None:
reveal_type(self.attr) # N: Revealed type is "tuple[builtins.int, Unpack[Ts`2], builtins.str]"
self.attr = ci # E: Incompatible types in assignment (expression has type "C[*tuple[int, ...]]", variable has type "tuple[int, *Ts, str]")
def meth(self, *args: *Ts) -> T: ...
ci: C[*tuple[int, ...]]
reveal_type(ci) # N: Revealed type is "__main__.C[Unpack[builtins.tuple[builtins.int, ...]]]"
reveal_type(ci.meth) # N: Revealed type is "def (*args: builtins.int) -> builtins.int"
c3: C[str, str, str]
reveal_type(c3) # N: Revealed type is "__main__.C[builtins.str, builtins.str, builtins.str]"
A = C[int, *Ts]
B = tuple[str, *tuple[str, str], str]
z: A[*B]
reveal_type(z) # N: Revealed type is "__main__.C[builtins.int, builtins.str, builtins.str, builtins.str, builtins.str]"
[builtins fixtures/tuple.pyi]
[case testTypeVarTupleNewSyntaxCallables]
from typing import Generic, overload, TypeVar
T1 = TypeVar("T1")
T2 = TypeVar("T2")
class MyClass(Generic[T1, T2]):
@overload
def __init__(self: MyClass[None, None]) -> None: ...
@overload
def __init__(self: MyClass[T1, None], *types: *tuple[type[T1]]) -> None: ...
@overload
def __init__(self: MyClass[T1, T2], *types: *tuple[type[T1], type[T2]]) -> None: ...
def __init__(self: MyClass[T1, T2], *types: *tuple[type, ...]) -> None:
pass
myclass = MyClass()
reveal_type(myclass) # N: Revealed type is "__main__.MyClass[None, None]"
myclass1 = MyClass(float)
reveal_type(myclass1) # N: Revealed type is "__main__.MyClass[builtins.float, None]"
myclass2 = MyClass(float, float)
reveal_type(myclass2) # N: Revealed type is "__main__.MyClass[builtins.float, builtins.float]"
myclass3 = MyClass(float, float, float) # E: No overload variant of "MyClass" matches argument types "type[float]", "type[float]", "type[float]" \
# N: Possible overload variants: \
# N: def [T1, T2] __init__(self) -> MyClass[None, None] \
# N: def [T1, T2] __init__(self, type[T1], /) -> MyClass[T1, None] \
# N: def [T1, T2] __init__(type[T1], type[T2], /) -> MyClass[T1, T2]
reveal_type(myclass3) # N: Revealed type is "Any"
[builtins fixtures/tuple.pyi]
[case testUnpackNewSyntaxInvalidCallableAlias]
from typing import Any, Callable, List, Tuple, TypeVar, Unpack
T = TypeVar("T")
Ts = TypeVarTuple("Ts") # E: Name "TypeVarTuple" is not defined
def good(*x: int) -> int: ...
def bad(*x: int, y: int) -> int: ...
Alias1 = Callable[[*Ts], int] # E: Variable "__main__.Ts" is not valid as a type \
# N: See https://mypy.readthedocs.io/en/stable/common_issues.html#variables-vs-type-aliases
x1: Alias1[int] # E: Bad number of arguments for type alias, expected 0, given 1
reveal_type(x1) # N: Revealed type is "def (*Any) -> builtins.int"
x1 = good
x1 = bad # E: Incompatible types in assignment (expression has type "def bad(*x: int, y: int) -> int", variable has type "def (*Any) -> int")
Alias2 = Callable[[*T], int] # E: "T" cannot be unpacked (must be tuple or TypeVarTuple)
x2: Alias2[int]
reveal_type(x2) # N: Revealed type is "def (*Any) -> builtins.int"
Unknown = Any
Alias3 = Callable[[*Unknown], int]
x3: Alias3[int] # E: Bad number of arguments for type alias, expected 0, given 1
reveal_type(x3) # N: Revealed type is "def (*Any) -> builtins.int"
IntList = List[int]
Alias4 = Callable[[*IntList], int] # E: "list[int]" cannot be unpacked (must be tuple or TypeVarTuple)
x4: Alias4[int] # E: Bad number of arguments for type alias, expected 0, given 1
reveal_type(x4) # N: Revealed type is "def (*Any) -> builtins.int"
[builtins fixtures/tuple.pyi]
[case testReturnInExceptStarBlock1]
# flags: --python-version 3.11
def foo() -> None:
try:
pass
except* Exception:
return # E: "return" not allowed in except* block
finally:
return
[builtins fixtures/exception.pyi]
[case testReturnInExceptStarBlock2]
# flags: --python-version 3.11
def foo():
while True:
try:
pass
except* Exception:
while True:
return # E: "return" not allowed in except* block
[builtins fixtures/exception.pyi]
[case testContinueInExceptBlockNestedInExceptStarBlock]
# flags: --python-version 3.11
while True:
try:
...
except* Exception:
try:
...
except Exception:
continue # E: "continue" not allowed in except* block
continue # E: "continue" not allowed in except* block
[builtins fixtures/exception.pyi]
[case testReturnInExceptBlockNestedInExceptStarBlock]
# flags: --python-version 3.11
def foo():
try:
...
except* Exception:
try:
...
except Exception:
return # E: "return" not allowed in except* block
return # E: "return" not allowed in except* block
[builtins fixtures/exception.pyi]
[case testBreakContinueReturnInExceptStarBlock1]
# flags: --python-version 3.11
from typing import Iterable
def foo(x: Iterable[int]) -> None:
for _ in x:
try:
pass
except* Exception:
continue # E: "continue" not allowed in except* block
except* Exception:
for _ in x:
continue
break # E: "break" not allowed in except* block
except* Exception:
return # E: "return" not allowed in except* block
[builtins fixtures/exception.pyi]
[case testBreakContinueReturnInExceptStarBlock2]
# flags: --python-version 3.11
def foo():
while True:
try:
pass
except* Exception:
def inner():
while True:
if 1 < 1:
continue
else:
break
return
if 1 < 2:
break # E: "break" not allowed in except* block
if 1 < 2:
continue # E: "continue" not allowed in except* block
return # E: "return" not allowed in except* block
[builtins fixtures/exception.pyi]
[case testLambdaInExceptStarBlock]
# flags: --python-version 3.11
def foo():
try:
pass
except* Exception:
x = lambda: 0
return lambda: 0 # E: "return" not allowed in except* block
def loop():
while True:
try:
pass
except* Exception:
x = lambda: 0
return lambda: 0 # E: "return" not allowed in except* block
[builtins fixtures/exception.pyi]
[case testRedefineLocalWithinExceptStarTryClauses]
# flags: --allow-redefinition
def fn_str(_: str) -> int: ...
def fn_int(_: int) -> None: ...
def fn_exc(_: Exception) -> str: ...
def in_block() -> None:
try:
a = ""
a = fn_str(a) # E: Incompatible types in assignment (expression has type "int", variable has type "str")
fn_int(a) # E: Argument 1 to "fn_int" has incompatible type "str"; expected "int"
except* Exception:
b = ""
b = fn_str(b)
fn_int(b)
else:
c = ""
c = fn_str(c)
fn_int(c)
finally:
d = ""
d = fn_str(d)
fn_int(d)
reveal_type(a) # N: Revealed type is "builtins.str"
reveal_type(b) # N: Revealed type is "builtins.int"
reveal_type(c) # N: Revealed type is "builtins.int"
reveal_type(d) # N: Revealed type is "builtins.int"
def across_blocks() -> None:
try:
a = ""
except* Exception:
a = fn_str(a) # E: Incompatible types in assignment (expression has type "int", variable has type "str")
else:
a = fn_str(a) # E: Incompatible types in assignment (expression has type "int", variable has type "str")
reveal_type(a) # N: Revealed type is "builtins.str"
def exc_name() -> None:
try:
pass
except* RuntimeError as e:
e = fn_exc(e)
[builtins fixtures/exception.pyi]
|
