Combine two columns of text in pandas dataframe

Question

I have a 20 x 4000 dataframe in Python using pandas. Two of these columns are named Year and quarter. I\'d like to create a variable called p

Answer 1

generalising to multiple columns, why not:

columns = ['whatever', 'columns', 'you', 'choose']
df['period'] = df[columns].astype(str).sum(axis=1)