API/ENH: Styler template arguments

Usecase - I have a Styler subclass with a new template that I want to pass some arbitrary stuff into - which currently there isn’t a great way to do (right now I’m overriding and re-implementing .render()).

Open to suggestions on the api, but I was thinking of adding template_args argument that would be passed to the template.

from pandas.formats.style import Styler
from jinja2 import Template

class MyStyler(Styler):
    template = Template("""
        .... omitted
        {{ my_value_1 }}
        """)

MyStyler(df, template_args={'my_value_1': '...'}).render()

xref #11610 (master tracker)

pandas 0.19.2

[chris-b1]

Very nice! Might be nice to wrap the subclassing into some kind of factory function to lessen the jinja2 knowledge required? Roughly

def make_styler_subclass(template_folder, visible_template_name):
    loader = ChoiceLoader([
        FileSystemLoader(template_folder),
        PackageLoader("pandas.formats")
    ])
    class MyStyler(pd.formats.style.Styler):
        env = Environment(loader=loader)
        template = env.get_template(visible_template_name)
    return MyStyler

[TomAugspurger]

Closed by https://github.com/pandas-dev/pandas/issues/15649 (I think solved everything, just forget to close it).