CI: testing wip branch on ci.
No need to review. will be closing to clear the queue later today.
Hello @simonjayhawkins! Thanks for updating this PR. We checked the lines you've touched for [PEP 8](https://www.python.org/dev/peps/pep-0008) issues, and found:

* In the file [`pandas/_libs_numba/algos.py`](https://github.com/pandas-dev/pandas/blob/0aa61e06c97f7ddf5143f19c005fee496ff60497/pandas/_libs_numba/algos.py):

> [Line 225:5](https://github.com/pandas-dev/pandas/blob/0aa61e06c97f7ddf5143f19c005fee496ff60497/pandas/_libs_numba/algos.py#L225): [E741](https://duckduckgo.com/?q=pep8%20E741) ambiguous variable name 'l'
> [Line 247:13](https://github.com/pandas-dev/pandas/blob/0aa61e06c97f7ddf5143f19c005fee496ff60497/pandas/_libs_numba/algos.py#L247): [E741](https://duckduckgo.com/?q=pep8%20E741) ambiguous variable name 'l'







































##### Comment last updated at 2021-03-21 13:11:55 UTC So looks like I can't put off dealing with the numba warnings in order to reduce the noise in the logs. have added numba to all the envs for testing purposes, so have reopened to re-run tests.

should have now removed the warnings for take_1d in object mode. _pad_2d_inplace still has the object related warnings