Python dataframe: Extract week# from Date column using isocalendar()-CodePudding

I have dataframe with Date column in the format 1/2/2014 16:00:00. I convert it to 01-02-2014 using this code: df['Date'] = pd.to_datetime(df['Date']).dt.strftime('%m-%d-%Y')

I get the week# in a separate column by df['Week'] = pd.DatetimeIndex(df['Date']).week but, I get warning saying that .week is deprecated and should use isocalendar().weekinstead.

Question:

I tried to operate isocalendar().week over the Date column but get error. Can someone point about how to use isocalendar() ?

CodePudding user response：

It works well for me...I think you need to keep almost the same format you started with (pd.DatetimeIndex)

pd.DatetimeIndex(df['Date']).isocalendar().week

CodePudding user response：

You should keep on using pd.to_datetime

df['Week'] = pd.to_datetime(df['Date']).dt.isocalendar().week

If you format the Date column to '%d-%m-%Y' this kind of day first representation, you can specify dayfirst argument

df['Week'] = pd.to_datetime(df['Date'], dayfirst=True).dt.isocalendar().week