I want to create new column based on existing old column using multiple conditions how to do that

Question

imagine i have a column days

I want to create a new column based on the condition that df['new_colum'] =

if day < 180:
 print(y)
elif( days >180 & < 365):
 print(d)
else:
 print(h)

how do i do this in python and any alternative for if condition

user_19255749 · Answer

You can use df.apply:

df['new_col'] = df.days.apply(lambda x: y if x < 180 else (d if  180 < x < 365 else h))