Pandas add multiple new columns at once from list of lists - list

Question

I have a list of timestamp lists where each inner list looks like this:
['Tue', 'Feb', '7', '10:07:40', '2017']
Is it possible with Pandas to add five new columns at the same time to an already created dataframe (same length as the outer list), that are equal to each of these values, with names 'day','month','date','time','year'?

Answer 1

I think you can use DataFrame constructor with concat:
df = pd.DataFrame({'A':[1,2,3],
'B':[4,5,6],
'C':[7,8,9]})
L = [['Tue', 'Feb', '7', '10:07:40', '2017'],
['Tue', 'Feb', '7', '10:07:40', '2017'],
['Tue', 'Feb', '7', '10:07:40', '2017']]
cols = ['day','month','date','time','year']
df1 = pd.DataFrame(L, columns=cols)
print (df1)
day month date time year
0 Tue Feb 7 10:07:40 2017
1 Tue Feb 7 10:07:40 2017
2 Tue Feb 7 10:07:40 2017
df2 = pd.concat([df, df1], axis=1)
print (df2)
A B C day month date time year
0 1 4 7 Tue Feb 7 10:07:40 2017
1 2 5 8 Tue Feb 7 10:07:40 2017
2 3 6 9 Tue Feb 7 10:07:40 2017
One liner:
df2 = pd.concat([df, pd.DataFrame(L, columns=['day','month','date','time','year'])], axis=1)
print (df2)
A B C day month date time year
0 1 4 7 Tue Feb 7 10:07:40 2017
1 2 5 8 Tue Feb 7 10:07:40 2017
2 3 6 9 Tue Feb 7 10:07:40 2017