Hello!
I am in the process of "typing" of some of my scripts.
Using it should help a lot to avoid some errors.
But this is new for me and I'm facing some problems.
Let's I have the following code (please don't look at the program content):
f=None # mypy naturally assumes Optional(int) because later, at open,
it is assigned an int.
..
if f is None:
f=os.open(...
..
if f is not None:
os.write(f, ...)
..
if f is not None:
os.close(f)
When I use mypy, it claims
Argument 1 to "write" has incompatible type "Optional[int]"; expected "int"
Argument 1 to "close" has incompatible type "Optional[int]"; expected "int"
How to solve this?
Is there a way to specify that when calling os.open f is an int only?
I use None a lot for specify uninitialized vars.
Thank you.
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