With Python 3.14, pyright checks templatelib.py and complains if --pythonversion < 3.14.

[Torom]

When I use pyright under Python 3.14 with a Python file that contains any str, pyright checks the file lib/python3.14/string/templatelib.py and complains about the template strings there because --pythonversion is set to a Python version < 3.14.

Test code a.py:

"hello world"

pyright --pythonversion 3.13 a.py leads to:

/home/torsten/.pyenv/versions/3.14.0/lib/python3.14/string/templatelib.py
  /home/torsten/.pyenv/versions/3.14.0/lib/python3.14/string/templatelib.py:3:5 - error: Template string literals (t-strings) require Python 3.14 or newer
  /home/torsten/.pyenv/versions/3.14.0/lib/python3.14/string/templatelib.py:5:24 - error: Cannot access attribute "interpolations" for class "str"
    Attribute "interpolations" is unknown (reportAttributeAccessIssue)
2 errors, 0 warnings, 0 informations

VS Code extension or command-line
cli

pyright --version
pyright 1.1.406

[erictraut]

Thanks for reporting this issue. It will be fixed in the next release.

[Bobronium]

Any viable workaround in the meanwhile?

[erictraut]

Any viable workaround in the meanwhile?

Three potential workarounds:

1. Run pyright on Python 3.13 rather than 3.14
2. Run pyright on 3.14 but don't use pythonVersion to override the version to 3.13
3. Downgrade to pyright 1.1.401 (the version before template string support was added)

[erictraut]

This is addressed in pyright 1.1.407