python学习-读取csv大文件

#  coding : UTF-8
import os, csv # 导入模块
PATH = "d:" + os.sep + "orders1.csv"  # 进行数据存储
def main(): # 主函数# 如果不使用“newline”(换行符)，记录中就会多出一个空行with open(file=PATH, mode="r", newline= "",encoding= "UTF-8") as file:csv_file = csv.reader(file)  # 创建csv读取对象header_row = next(csv_file)  # 读取标题内容print(header_row)  # 读取标题行# 文件较大是一行一行处理，节省内存rows = [row for row in csv_file]print(rows)
if __name__ == "__main__": # 判断程序执行名称main() # 调用主函数

代码执行结果：

[‘用户’, ‘省份’, ‘城市’, ‘总额’, ‘数量’]
[[‘BCC-a’, ‘北京’, ‘北京’, ‘678’, ‘30’], [‘BCC-b’, ‘河北’, ‘保定’, ‘341’, ‘10’], [‘BCC-c’, ‘陕西’, ‘西安’, ‘132’, ‘13’]]