zoukankan      html  css  js  c++  java
  • python读写csv文件

     博客https://www.cnblogs.com/en-heng/p/5630849.html介绍了如何利用pandas进行数据分析

    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=',')
    import pandas as pd
    data = pd.read_csv('test.csv')
    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
        writer.writerow(["index","a_name","b_name"])
        #写入多行用writerows
        writer.writerows([[0,1,3],[1,2,3],[2,3,4]])
    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

     

     

  • 相关阅读:
    格式化输出数字
    传教士经验
    集合
    替换
    连接
    填充
    取值
    分割
    创建日历和日期列表
    常用日期格式
  • 原文地址:https://www.cnblogs.com/hester-tang/p/8870714.html
Copyright © 2011-2022 走看看