Typ excel writer _base
- [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them

If this is ok, I will type the other classes too

@phofl The issue is already fixed in the just released pyright 1.1.202 :)

Feel free to remove the "Remove typevar" commit and bump the version of pyright [here](https://github.com/pandas-dev/pandas/blob/ae7916c56fd3323448fbdc136681162737229650/.github/workflows/code-checks.yml#L77) and [here](https://github.com/pandas-dev/pandas/blob/ae7916c56fd3323448fbdc136681162737229650/.pre-commit-config.yaml#L81). @phofl ping when ready as @twoertwein ok here Reverted the commit, let's see if it works > Reverted the commit, let's see if it works

You also need to bump the pyright version (pyright is pinned). Ah, thx. Should have expected that

Edit: And missed your comment above Looks good now, cc @jreback thanks @phofl 