Spider -- 数据持久化 之 csv文件

1、导入模块
2、打开csv文件
3、初始化写入对象
4、写入数据(参数为列表)
import csv 
?
with open(‘film.csv‘,‘w‘) as f:
    writer = csv.writer(f)
    writer.writerow([])

# 单行写入（writerow([]))
import csv
with open(‘test.csv‘,‘w‘,newline=‘‘) as f:
    writer = csv.writer(f)
    writer.writerow([‘步惊云‘,‘36‘])
    writer.writerow([‘超哥哥‘,‘25‘])
?
# 多行写入(writerows([(),(),()]
# newline = ‘‘:在Windows中默认会添加1个空行，所以加入newline = ‘‘参数，避免空行出现
import csv
with open(‘test.csv‘,‘w‘,newline=‘‘) as f:
    writer = csv.writer(f)
    writer.writerows([(‘聂风‘,‘36‘),(‘秦霜‘,‘25‘),(‘孔慈‘,‘30‘)])