python – 将数据帧转换为具有列表值的字典

假设我有一个Dataframe df:

Label1    Label2        Label3
key1      col1value1    col2value1
key2      col1value2    col2value2
key3      col1value3    col2value3


dict1 = df.set_index('Label1').to_dict() 

这有效,当我们有2列..

预期产出:

my_dict = {key1: [col1value1,col2value1] , key2: [ col1value2,col2value2] , key3:[col1value3,col2value3] }

我可以在Dataframe df上使用to_dict来将一个带有2个其他列的键作为列表形式的值吗?

最佳答案 那么你可以使用字典理解和iterrows:

print {key:row.tolist() for key,row in df.set_index('Label1').iterrows()}

{'key3': ['col1value3', 'col2value3'],
 'key2': ['col1value2', 'col2value2'], 
 'key1': ['col1value1', 'col2value1']}

另外,我认为以下内容也适用:

df = df.set_index('Label1')
print df.T.to_dict(outtype='list')

{'key3': ['col1value3', 'col2value3'],
 'key2': ['col1value2', 'col2value2'],
 'key1': ['col1value1', 'col2value1']}

截至2017年秋季更新; outtype不再是关键字参数.改为使用东方:

In [11]: df.T.to_dict(orient='list')
Out[11]: 
{'key1': ['col1value1', 'col2value1'],
 'key2': ['col1value2', 'col2value2'],
 'key3': ['col1value3', 'col2value3']}
点赞