How do I convert datetime format Year-Quarter to Quarter-Year in python?

Question

Now I have a column like this in a pandas dataframe:

Year_Quarter
2014Q1
2015Q1
2015Q2
2016Q3

I got this column by converting another column of date using the following code:

combine['Publish Date'] = pd.to_datetime(combine['Publish Date']).dt.strftime('%Y-%m-%d')
combine['Year_Quarter'] = pd.to_datetime(combine['Publish Date']).dt.to_period('Q').astype(str)

How do I convert this date format into:

Q12014
Q12015
Q22015
Q32016

Thanks for your help!

Answer 1

You could try this with strftime to get the custom format:

combine['Year_Quarter'] = pd.to_datetime(combine['Publish Date']).dt.to_period("Q").dt.strftime('Q%q%Y')

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Or as is suggested in the comments by @Barmar and @anky, you could slice the column too:

combine['Year_Quarter'] = pd.to_datetime(combine['Publish Date']).dt.to_period('Q').astype(str) 
combine['Year_Quarter']=combine['Year_Quarter'].str[-2:].add(combine['Year_Quarter'].str[:4])

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Both outputs:

combine['Year_Quarter']

Q12014
Q12015
Q22015
Q32016