如何在python中将列表列表转换为Pandas数据框

Question

I have a list as follows and need to covert it a pandas dataframe.

mylist = [[2000, 0.5, 0.3, 0.8, 0.9, 0.8], [2001, 0.5, 0.6, 0.8, 0.9, 0.9], [2002, 0.5, 0.3, 0.8, 0.8, 0.8], [2003, 0.9, 0.9, 0.9, 0.9, 0.8]]
columns = ['year', 'score_1', 'score_2', 'score_3', 'score_4', 'score_5']

I want the dataframe to be as follows.

    year score_1 score_2 score_3 score_4 score_5
0    2000   0.5    0.3     0.8      0.9     0.8
1    2001   0.5    0.6     0.8      0.9     0.9
2    2002   0.5    0.3     0.8      0.8     0.8
3    2003   0.9    0.9     0.9      0.9     0.8

Currently, I am following the following code. But it needs to restructure my original 'mylist' data as 'year' and 'scores'.

pd.DataFrame(data=[scores],index=[year],columns=columns)

Therefore, I would like to know if there is any easy way of doing this in pandas.

I am happy to provide more details if needed.

Answer 1

If need only columns pass mylist :

df = pd.DataFrame(mylist,columns=columns)
print (df)

   year  score_1  score_2  score_3  score_4  score_5
0  2000      0.5      0.3      0.8      0.9      0.8
1  2001      0.5      0.6      0.8      0.9      0.9
2  2002      0.5      0.3      0.8      0.8      0.8
3  2003      0.9      0.9      0.9      0.9      0.8

But if need index by years use dictionary comprehension with DataFrame.from_dict :

df = pd.DataFrame.from_dict({x[0]: x[1:] for x in mylist},columns=columns[1:], orient='index')
print (df)

      score_1  score_2  score_3  score_4  score_5
2000      0.5      0.3      0.8      0.9      0.8
2001      0.5      0.6      0.8      0.9      0.9
2002      0.5      0.3      0.8      0.8      0.8
2003      0.9      0.9      0.9      0.9      0.8

And if need set index names add DataFrame.rename_axis :

d = {x[0]: x[1:] for x in mylist}
df = pd.DataFrame.from_dict(d,columns=columns[1:], orient='index').rename_axis(columns[0])
print (df)

      score_1  score_2  score_3  score_4  score_5
year                                             
2000      0.5      0.3      0.8      0.9      0.8
2001      0.5      0.6      0.8      0.9      0.9
2002      0.5      0.3      0.8      0.8      0.8
2003      0.9      0.9      0.9      0.9      0.8