dataframe, set index from list

Question

Is it possible when creating a dataframe from a list, to set the index as one of the values?

import pandas as pd

tmp = [[\'a\', \'a1\'], [\'b\',\' b1\']]

df =          


        

Answer 1

If you don't want index name:

df = pd.DataFrame(tmp, columns=["First", "Second"], index=[i[0] for i in tmp])

Result:

  First Second
a     a     a1
b     b     b1

Answer 2

>>> pd.DataFrame(tmp, columns=["First", "Second"]).set_index('First', drop=False)
      First Second
First             
a         a     a1
b         b     b1

Answer 3

Change it to list before assigning it to index

df.index = list(df["First"])