Allow using # type: ignore to skip type checking in a file · Issue #626 · python/mypy · GitHub

As per PEP 484 discussion, it should be possible to use # type: ignore to skip type checking in the rest of a file:

# type: ignore
... # ignore type errors here

Currently the comment can only be used to ignore errors on individual lines.

(Moved assignment and Milestone from the duplicate #964.)

I wonder what we should do if this happens within a function. Should we then ignore all errors within the function only? Example:

def f() -> None:
    # type: ignore
    return 1 + 'x'   # don't report an error?

a = 1 + 'y'   # report an error here?

This could be nice, as it would let people annotate functions but ignore errors in the body of the function. @no_type_check is not a good match, as it also causes the annotations to be ignored.

Yeah, I agree that this should be block-scoped.

Hello,

Alternatively, could there be a way to exclude certain files or directories from command line or in the configuration file?

Currently, if I type mypy my_directory, the entire folder is scanned. It would be very handy to be able to add an --exclude argument.

In my case, I want to exclude automatically created Django migration files, but still scan my entire Django app.

You can use the `ignore_errors` per-file option.

Thank you @gvanrossum, this seems to be what I was looking for.

Could you please assist me a bit further? I tried to follow the instructions, but something is still not working:

mypy.ini

[mypy]

[gw_box.migrations.*]
ignore_errors = True

$ mypy gw_box --ignore-missing-imports --config-file mypy.ini
gw_box/migrations/0001_initial.py:14: error: Need type annotation for variable

You need to add a section like this:

[mypy-dropbox.edgestore.datatypes.namespace]
ignore_errors = False

For docs see http://mypy.readthedocs.io/en/latest/config_file.html

Thank you, I figured out I was just missing the mypy- part.

P.S. Just figured out who you were. Huge thank you for creating Python :)

@ddfisher Are you planning to work on this?

So is it still not possible to do this? I'm looking to disable mypy checking for tests and cannot find a good way to do this.

@Beefy-Swain You can. See https://mypy.readthedocs.io/en/latest/config_file.html.

I’m currently working on a PR for this. I should have something up in the next couple of days.

Ignoring a file with a single # type: ignore comment. (#6830)

Ignoring a file with a single # type: ignore comment. (python#6830)

@Beefy-Swain You can. See https://mypy.readthedocs.io/en/latest/config_file.html.

The proposed solution don't work in case the mypy.ini is being controlled by a different entity (DevOps for example).
There is certainly a need for a local solution

@danielbraun89 # type: ignore comment at the beginning of the file is now supported. Does it not work for you?

You can also use # mypy: ignore-errors at the top of the file.

Both doesnt work for me, I guess the problem in my side

I'm using 0.740 checking a Python 2 repo and neither # type: ignore nor # mypy: ignore-errors at the top of a file work for me. My configuration looks like this:

[mypy]
mypy_path = ...
python_version = 2.7
disallow_any_unimported = false
disallow_any_decorated = true
disallow_untyped_calls = true
warn_redundant_casts = true
warn_unused_ignores = true
# HACK: Remove this as soon as possible
ignore_missing_imports = true

I'm using 0.740 checking a Python 2 repo and neither # type: ignore nor # mypy: ignore-errors at the top of a file work for me. My configuration looks like this:
[mypy]
mypy_path = ...
python_version = 2.7
disallow_any_unimported = false
disallow_any_decorated = true
disallow_untyped_calls = true
warn_redundant_casts = true
warn_unused_ignores = true
# HACK: Remove this as soon as possible
ignore_missing_imports = true

It seems like a bug they fixed in 0.750(see #7789). We also found per file ignore not working in 0.740 and confirmed 0.750 have fixed this.

How can I apply this to line 3 in the following code? Comments are not allowed here. I tried to add it after """ on line 7, but that didn't work.

1: return f"""
2:    {'constexpr' if self.is_constexpr() else ''} ValueType verifyValue({argument}) {{
3:        return ({self.value_in_range_expression()})
4:            ? {return_value}
5:            : throw std::out_of_range("{self.out_of_range_exception_message()}");
6:    }}
7:    """

The proposal for # type: ignore in the body of the function appears not to work yet:

the below code errors with mypy 0.901

def my_sum(*args: int) -> int:
    return sum(args)


def other() -> None:
    # type: ignore
    print(my_sum("1", 2))

We gave up on that, it didn't seem all that important.

Allow using # type: ignore to skip type checking in a file · Issue #626 · python/mypy · GitHub

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Allow using # type: ignore to skip type checking in a file #626

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Allow using # type: ignore to skip type checking in a file · Issue #626 · python/mypy · GitHub

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Allow using # type: ignore to skip type checking in a file #626

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gvanrossum commented on Jul 29, 2016

JukkaL commented on Aug 17, 2016

gvanrossum commented on Aug 17, 2016

syenchuk commented on Feb 14, 2017

gvanrossum commented on Feb 14, 2017

syenchuk commented on Feb 14, 2017

gvanrossum commented on Feb 14, 2017

syenchuk commented on Feb 14, 2017

JukkaL commented on May 31, 2017

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benjamin-kirkbride commented on May 11, 2019

mitar commented on May 12, 2019

brandtbucher commented on May 12, 2019

danielbraun89 commented on Jul 22, 2019

JukkaL commented on Jul 22, 2019

gvanrossum commented on Jul 22, 2019

danielbraun89 commented on Jul 23, 2019

dargueta commented on Nov 25, 2019

kkpattern commented on Dec 10, 2019

nedrebo commented on Apr 3, 2020

ikamensh commented on Jun 9, 2021

gvanrossum commented on Jun 9, 2021

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