Pandas把dataframe或series转换成list的方法

 df = pd.DataFrame({'a':[1,3,5,7,4,5,6,4,7,8,9], 'b':[3,5,6,2,4,6,7,8,7,8,9]})

# 方法1df['a'].values.tolist() # 方法2df['a'].tolist()

df['a'].drop_duplicates().values.tolist()

df = pd.DataFrame([3, 5, 6, 2, 4, 6, 7, 8, 7, 8, 9])

df.values.tolist()

Series.tolist()

import pandas as pd
data = pd.DataFrame([['a',1],['b',2]], columns=['key','value'])
dict1 = dict(zip(data['key'],data['value']))

data
Out[25]: 
  key value
0  a   1
1  b   2

data.to_dict()

Out[10]: {'key': {0: 'a', 1: 'b'}, 'value': {0: 1, 1: 2}}

dict2 = data.set_index('key').to_dict()

dict2

Out[24]: {'value': {'a': 1, 'b': 2}}