Is there a Python function to determine which quarter of the year a date is in?

Question

Sure I could write this myself, but before I go reinventing the wheel is there a function that already does this?

Answer 1

IF you are already using pandas, it's quite simple.

import datetime as dt
import pandas as pd

quarter = pd.Timestamp(dt.date(2016, 2, 29)).quarter
assert quarter == 1

If you have a date column in a dataframe, you can easily create a new quarter column:

df['quarter'] = df['date'].dt.quarter