Variable is not defined error for f-string debug statement

[squaresmile]

Environment data

• Language Server version: Pylance v2020.12.0
• OS and version: Windows 10 20H2 19042.662
• Python version (& distribution if applicable, e.g. Anaconda): Python 3.9.0

Expected behaviour

Pylance can see the variable in f-string debug statement.

Actual behaviour

<variable_name[:-1]> is not defined error is raised by Pylance

Code Snippet / Additional information

test_var = 123
print(f"{test_var=}")

Error: "test_va" is not defined Pylance(reportUndefinedVariable)

[erictraut]

Thanks for the bug report. This will be fixed in the next release. In the meantime, you can work around the issue by inserting a space before the "=" token in the f-string expression.

[jakebailey]

This issue has been fixed in version 2020.12.1, which we've just released. You can find the changelog here: https://github.com/microsoft/pylance-release/blob/master/CHANGELOG.md#2020121-9-december-2020