Use-before-def reported for class fields without default values

[melwas]

Environment data
VS Code version: 1.29.0
Extension version (available under the Extensions sidebar): 2018.10.1
OS and version: OSX
Python version (& distribution if applicable, e.g. Anaconda): python 3.7
Type of virtual environment used (N/A | venv | virtualenv | conda | ...): virtualenv

Actual behavior
Python 3.7 dataclass properties are incorrectly reported as "used before definition". The same syntax with default values added is not reported.

Expected behavior
The properties are not reported.

Steps to reproduce:
See screenshot above.

BTW: is it possible (as a workaround to above issue) to suppress warnings for a given block/line?

[jakebailey]

The analyzer only offers basic detection of use-before-def and unresolved imports, and doesn't have the ability to disable checks per line (#264). What you can do in the meantime is disable the diagnostic in your settings, like:

"python.analysis.disabled": [
    "use-before-def"
]

And use something like pylint which I don't believe will misreport this (with the downside that it can only be run on save, while the language server can do these checks instantly).

[lukaselmer]

I have the same issue.

@jakebailey there is a typo in anaysis - it should be

"python.analysis.disabled": [
    "use-before-def"
]

[jakebailey]

Agh, yeah, sorry.

[koliyo]

I hope these issues become a priority. VS code should really encourage the usage of the typing syntax!

[brettcannon]

This was noticed on Stack Overflow.