python3爬虫开发 读写csv文件

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笔记

1.读写步骤

1.导入模块
import csv

2.读

with open('xxx.csv',encoding="utf-8") as f:
	reader=csv.DictReader(f)
	for raw in reader:
		print(row)

3.写

with  open("xxx.sxv","w",encoding="utf-8") as f:
	writer=csv.DicWriter(f.fieldnames=['a','b'])
	writer.writerows(data)

2.解决csv写入空一行的办法

with open("save.csv","w",encoding="utf-8",newline='') as f:

加上 newline=""就可以了
原因：https://blog.csdn.net/pfm685757/article/details/47806469