An immature idea.
Python now has a type prompt, so you can provide a parameter for the Python interpreter to control whether to open the check type operation.
For example, in the code, I explicitly use the type prompt, such as:
# Test1.py
def foo(a: str, b: str) -> str:
c = None # type:str
return 'hi'
We can run the code with a parameter, such as
python -T test1.py
To prevent the Python interpreter from detecting the variable types in it, so as to improve the running speed.