python csv文件写入（推荐）

python 将数据写入到 .csv 文件里

import json
import os
import csv


class SaveCSV(object):

    def save(self, keyword_list, path, item):

        try:
            # 第一次打开文件时，第一行写入表头
            if not os.path.exists(path):
                with open(path, "w", newline='', encoding='utf-8') as csvfile:
                    writer = csv.DictWriter(csvfile, fieldnames=keyword_list)  # 写字典的方法
                    writer.writeheader()  # 写表头的方法

            # 追加写入内容
            with open(path, "a", newline='', encoding='utf-8') as csvfile:
                writer = csv.DictWriter(csvfile, fieldnames=keyword_list)
                writer.writerow(item)  # 按行写入数据
                print("写入成功")
        # 报错将吧错误记录到error.txt文件里
        except Exception as e:
            print("写入失败 = ", e)
            # 记录错误数据
            with open("error.txt", "w") as f:
                f.write(json.dumps(item) + ",\n")
            pass


if __name__ == '__main__':
    # 保存的文件名路径
    path = "/Users/mac/test1.csv"
    # 案例字典数据
    item = {'千千': 666, '问问': 555, '蛋蛋': 999}
    # 保存的表头
    item_list = ["千千", "问问", "蛋蛋"]
    s = SaveCSV()
    
    """ 
    	循环3次 插入3行数据
    """
    for i in range(3):
        s.save(item_list, path, item)

效果类似如下：

千千	问问	蛋蛋
666	555	999
666	555	999
666	555	999