Aus*_*tin 4 list multiple-columns pandas python-3.5
我有一个时间戳列表列表,其中每个内部列表如下所示:
['Tue', 'Feb', '7', '10:07:40', '2017']
Pandas 是否可以将五个新列同时添加到已创建的数据帧(与外部列表长度相同),这些列等于这些值中的每一个,名称为'day','month','date','time','year'?
我认为你可以使用DataFrame构造函数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
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一个班轮:
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
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