How to ignore mypy errors when using NamedTuples with default values
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0
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I have been able to have mypy do a type check on NamedTuple and use default values for NamedTuple.
However, I always have an error raised by mypy when I use default value.
Here is my code (I use Python 3.6)
class TestResult(NamedTuple):
"""To store results of a given Test Case"""
outcome: str
duration: Optional[int] # in seconds
comment: Optional[str]
msg: Optional[str]
TestResult.__new__.__defaults__ = (None,) * 3 # type: ignore # Hack for Python < 3.7
When I do passed_tc = TestResult("Passed"), I have the following error message
error:Too few arguments for "TestResult"
Anyone got an idea on how to tell mypy we can have optional arguments and avoid this error?
python python-3.x namedtuple mypy
asked Nov 11 at 1:39
Jean-Francois T.
4,92712754
add a comment |
up vote
0
down vote
favorite
I have been able to have mypy do a type check on NamedTuple and use default values for NamedTuple.
However, I always have an error raised by mypy when I use default value.
Here is my code (I use Python 3.6)
class TestResult(NamedTuple):
"""To store results of a given Test Case"""
outcome: str
duration: Optional[int] # in seconds
comment: Optional[str]
msg: Optional[str]
TestResult.__new__.__defaults__ = (None,) * 3 # type: ignore # Hack for Python < 3.7
When I do passed_tc = TestResult("Passed"), I have the following error message
error:Too few arguments for "TestResult"
Anyone got an idea on how to tell mypy we can have optional arguments and avoid this error?
python python-3.x namedtuple mypy
asked Nov 11 at 1:39
Jean-Francois T.
4,92712754
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I have been able to have mypy do a type check on NamedTuple and use default values for NamedTuple.
However, I always have an error raised by mypy when I use default value.
Here is my code (I use Python 3.6)
class TestResult(NamedTuple):
"""To store results of a given Test Case"""
outcome: str
duration: Optional[int] # in seconds
comment: Optional[str]
msg: Optional[str]
TestResult.__new__.__defaults__ = (None,) * 3 # type: ignore # Hack for Python < 3.7
When I do passed_tc = TestResult("Passed"), I have the following error message
error:Too few arguments for "TestResult"
Anyone got an idea on how to tell mypy we can have optional arguments and avoid this error?
python python-3.x namedtuple mypy
asked Nov 11 at 1:39
Jean-Francois T.
4,92712754
I have been able to have mypy do a type check on NamedTuple and use default values for NamedTuple.
However, I always have an error raised by mypy when I use default value.
Here is my code (I use Python 3.6)
class TestResult(NamedTuple):
"""To store results of a given Test Case"""
outcome: str
duration: Optional[int] # in seconds
comment: Optional[str]
msg: Optional[str]
TestResult.__new__.__defaults__ = (None,) * 3 # type: ignore # Hack for Python < 3.7
When I do passed_tc = TestResult("Passed"), I have the following error message
error:Too few arguments for "TestResult"
Anyone got an idea on how to tell mypy we can have optional arguments and avoid this error?
python python-3.x namedtuple mypy
python python-3.x namedtuple mypy
asked Nov 11 at 1:39
Jean-Francois T.
4,92712754
asked Nov 11 at 1:39
Jean-Francois T.
4,92712754
asked Nov 11 at 1:39
Jean-Francois T.
4,92712754
asked Nov 11 at 1:39
Jean-Francois T.
4,92712754
asked Nov 11 at 1:39
Jean-Francois T.
4,92712754
4,92712754
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
accepted
Assign the values that need default values with the desired default values. For example:
from typing import NamedTuple, Optional
class Test(NamedTuple):
foo: str
bar: Optional[str] = None
qux: int = 100
t = Test("foo")
I've tested that this works at runtime for both Python 3.6 and 3.7, and confirmed it type-checks as expected using mypy 0.641.
answered Nov 12 at 2:45
Michael0x2a
22k1672125
Nice, it's usually the simplest thing that you never think of.
– Jean-Francois T.
Nov 13 at 8:04
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
Assign the values that need default values with the desired default values. For example:
from typing import NamedTuple, Optional
class Test(NamedTuple):
foo: str
bar: Optional[str] = None
qux: int = 100
t = Test("foo")
I've tested that this works at runtime for both Python 3.6 and 3.7, and confirmed it type-checks as expected using mypy 0.641.
answered Nov 12 at 2:45
Michael0x2a
22k1672125
Nice, it's usually the simplest thing that you never think of.
– Jean-Francois T.
Nov 13 at 8:04
add a comment |
up vote
1
down vote
accepted
Assign the values that need default values with the desired default values. For example:
from typing import NamedTuple, Optional
class Test(NamedTuple):
foo: str
bar: Optional[str] = None
qux: int = 100
t = Test("foo")
I've tested that this works at runtime for both Python 3.6 and 3.7, and confirmed it type-checks as expected using mypy 0.641.
answered Nov 12 at 2:45
Michael0x2a
22k1672125
Nice, it's usually the simplest thing that you never think of.
– Jean-Francois T.
Nov 13 at 8:04
add a comment |
up vote
1
down vote
accepted
up vote
1
down vote
accepted
Assign the values that need default values with the desired default values. For example:
from typing import NamedTuple, Optional
class Test(NamedTuple):
foo: str
bar: Optional[str] = None
qux: int = 100
t = Test("foo")
I've tested that this works at runtime for both Python 3.6 and 3.7, and confirmed it type-checks as expected using mypy 0.641.
answered Nov 12 at 2:45
Michael0x2a
22k1672125
Assign the values that need default values with the desired default values. For example:
from typing import NamedTuple, Optional
class Test(NamedTuple):
foo: str
bar: Optional[str] = None
qux: int = 100
t = Test("foo")
I've tested that this works at runtime for both Python 3.6 and 3.7, and confirmed it type-checks as expected using mypy 0.641.
answered Nov 12 at 2:45
Michael0x2a
22k1672125
answered Nov 12 at 2:45
Michael0x2a
22k1672125
answered Nov 12 at 2:45
Michael0x2a
22k1672125
answered Nov 12 at 2:45
Michael0x2a
22k1672125
22k1672125
Nice, it's usually the simplest thing that you never think of.
– Jean-Francois T.
Nov 13 at 8:04
add a comment |
Nice, it's usually the simplest thing that you never think of.
– Jean-Francois T.
Nov 13 at 8:04
Nice, it's usually the simplest thing that you never think of.
– Jean-Francois T.
Nov 13 at 8:04
Nice, it's usually the simplest thing that you never think of.
– Jean-Francois T.
Nov 13 at 8:04
add a comment |
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