Add Multiple Columns to Pandas Dataframe from Function

Question

I have a pandas data frame mydf that has two columns,and both columns are datetime datatypes: mydate and mytime. I want to add three more

Answer 1

def getWd(d):
    d.isocalendar()[1], d.weekday()
def getH(t):
    return t.hour
mydf["hour"] = zip(*df["mytime"].map(getH))
mydf["weekday"], mydf["weeknum"] = zip(*df["mydate"].map(getWd))