生成test.csv文件
#coding=utf-8 import pandas as pd #任意的多组列表 a = [1,2,3] b = [4,5,6] #字典中的key值即为csv中列名 dataframe = pd.DataFrame({'a_name':a,'b_name':b}) #将DataFrame存储为csv,index表示是否显示行名,default=True dataframe.to_csv("test.csv",index=False,sep=',')
内容为
a_name b_name 0 1 4 1 2 5 2 3 6
读取csv文件
#coding=utf-8 import pandas as pd data = pd.read_csv('test.csv') print(data)
输出
C:UsersmacnameDesktop >python test.py a_name b_name 0 1 4 1 2 5 2 3 6
另一种方法用csv包,一行一行写入
#coding=utf-8 import csv #python2可以用file替代open with open("test.csv","w") as csvfile: writer = csv.writer(csvfile) #先写入columns_name #写入多行用writerows writer.writerows([["index","a_name","b_name"],[0,1,3],[1,2,3],[2,3,4]])
内容为
index,a_name,b_name 0,1,3 1,2,3 2,3,4
读取csv文件用reader
#coding=utf-8 import csv with open("test.csv","r") as csvfile: reader = csv.reader(csvfile) #这里不需要readlines for line in reader: print(line)
输出
C:UsersmacnameDesktop >python test.py ['index', 'a_name', 'b_name'] [] ['0', '1', '3'] [] ['1', '2', '3'] [] ['2', '3', '4'] []