Evaluating multiple conditions in if-then-else block in a Pandas DataFrame

Question

I want to create a new column in a Pandas DataFrame by evaluating multiple conditions in an if-then-else block.

if events.hour <= 6:
    events[\'time_slice\         


        

Answer 1

You could create a function:

def time_slice(hour):
    if hour <= 6:
        return 'night'
    elif hour <= 12:
        return 'morning'
    elif hour <= 18:
        return 'afternoon'
    elif hour <= 23:
        return 'evening'

then events['time_slice'] = events.hour.apply(time_slice) should do the trick.