python读取导出数据

1，python读取csv的某一列

import pandas as pd

data1 = pd.read_csv('cotton.csv', usecols=[0， 1], encoding='utf-8')

2，将csv读出来的dataframe转化为list

import pandas as pd
import numpy as np

data1 = pd.read_csv('cotton.csv', usecols=[0], encoding='utf-8')
train_x_list=np.array(data1).tolist()#list
print(train_x_list)