Solution to disable 'body checks'

[KazzyJr]

Greetings!

I work in a team that uses typeguard as a library, specifically to decorate methods with the typechecked decorator. We have recently upgraded from 2.x.x to 4.x.x and have hit a lot of snags in our testing pipeline, related to the fact that the old wrapping method was updated to a partial handling of the function.
The main issue here is that typeguard checks the types within the body as well, and if a method argument typed as str changes to an int during a loop inside the function body, for example, typeguard raises an exception. This is a bit too strict for our development needs as we would like to still use Python's duck-typing down the way.

@typechecked
def my_fun(arg1: str, arg2: int) -> list:
    while arg2 > 5:
        if arg1 == 'my_str':
            arg1 = arg2  # this is where it breaks
            arg2 -= 5
        else:
             arg2 -= 20

The question for you is: could a solution be implemented for the typechecked decorator that only limits the checking to the initial passed-on arguments (that enables the above example to pass)?

A few options from the top of mind below:

@typechecked(body_check=False)

OR

os.environ['TYPEGUARD_BODY_CHECK'] = 0

Thanks!

[agronholm]

Mypy is also going to complain about such errors, but I understand where you're coming from. I could accept a PR to this end where the flag is added as a configuration option (not env variable).

[agronholm]

Oh, right, so typechecked() will require a new parameter too.

[agronholm]

Any reason you're not using the import hook btw?

[KazzyJr]

We only decorate particular exposed methods, thus we need it targeted.