Add CSS formating for deprecated parameters / methods

[TomAugspurger]

These aren't especially noticeable in the HTML docs.

Adding this to our CSS should fix that

div.deprecated {
    background-color: #ffe4e4;
    border: 1px solid #f66;
}

cc @datapythonista @shoyer

[TomAugspurger]

https://github.com/pandas-dev/pandas/blob/master/doc/source/themes/nature_with_gtoc/static/nature.css_t is the CSS file I think.

[Imanflow]

I would like to take this as my first contribution.

[TomAugspurger]

👍 thanks.

I think if you modify the CSS file then run

# in pandas/doc
python make.py --single=pandas.DataFrame.from_csv

you should be able to validate the output quickly.

[Imanflow]

i follow the intructions from https://pandas.pydata.org/pandas-docs/stable/contributing.html#where-to-start
until git checkout -b shiny-new-feature. I did the change in the file, but this step git fetch upstream, it says upstream is not a repository. I tried git fetch pandas, but it didnt work either.

Regarding python make.py --single=pandas.DataFrame.from_csv,

error message ImportError: dateutil 2.5.0 is the minimum required version despite i installed python-dateutil v==4.0.0

I'm sorry for my inexpertise

[TomAugspurger]

What's git remote -v?

May have to add pandas-dev/pandas as a remote

git remote add upstream https://github.com/pandas-dev/pandas

Not sure about the dateutil error. Did you make an environment for pandas? Did you activate it?

[Imanflow]

I started the process again, and everything worked fine.

Here is the pull request: #20357