Enable pass through *args, **kwargs to function in GroupBy

[blip2]

Similar to: #376

[wesm]

Could you explain what you mean / give an example?

[blip2]

Here would be my desired usage to group a timeseries by minutes (to a specific date):

def minutes(date,group_to):
    time = date.strftime("%H:%M:%S")
    date = group_to.strftime("%Y-%m-%d")
    dt = datetime.strptime(date + " " + time, "%Y-%m-%d %H:%M:%S")
    return dt

window = data.groupby(minutes,group_to=some_date)

If there is a neater way to do this, please help!

[dalejung]

minutes = lambda date, group_to: datetime.combine(group_to, date.time())
df.groupby(lambda date: minutes(date, some_date))

You would throw around lambda, partials, etc. To be honest, I thought pass through would be something I wanted and monkey-patched it in, but it's less clear what you're doing when you re-read the code later on.

[blip2]

Excellent, that'll do nicely. Thanks.