[SOLVED] How to make ty ignore a single line in a source file?

How to make ty ignore a single line in a source file?

I have been experimenting with Astral's type checker ty recently. As its still pre-release, I run into false-positives from time to time and would like to explicitly tell ty to ignore these.

How can this be done?

Solution

See here for more information.

Suppress rule violation in single line

To ignore all type errors in a given line, you can either append

# ty: ignore which is specific to ty (ideal for false-positives)
```
def f(x: int) -> str:
    return x  # ty: ignore
```
# type: ignore which is also used by other type checkers like mypy
```
def f(x: int) -> str:
    return x  # type: ignore
```

Suppress specific rule violation(s)

a = 10 + "test"  # ty: ignore[unsupported-operator]

add_three("one", 5)  # ty: ignore[missing-argument, invalid-argument-type]

Suppress all violations in file

Moreover, # type: ignore can be used at the top of a file to ignore all type errors in that file.

# type: ignore

def f1(x: int) -> str:
    return x

def f2(x: str) -> int:
    return x