Python操作csv文件实例详解

#读取csv文件方法1
import csv
csvfile = open('csvWrite.csv',newline='')#打开一个文件
csvReader = csv.reader(csvfile)#返回的可迭代类型
print(type(csvReader))
for content in csvReader:
  print(content)
csvfile.close()#关闭文件
//运行结果如下：
<class '_csv.reader'>
['编号','网址','关键字']
['1','http://nnzhp.cn/','牛牛']
['2','http://www.baidu.com/','百度']
['3','http://www.jd.com/','京东']
['4','http://http://www.cnblogs.com/hhfzj/','自己博客']

#读取csv文件方法2
import csv
with open('csvWtite.csv',newline='') as csvfile:#此方法:当文件不用时会自动关闭文件
  csvReader = csv.reader(csvfile)
  for content in csvReader:
    print(content)

import csv
csvfile = open('csvWrite.csv','w',newline='')
writer = csv.writer(csvfile)
writer.writerow(('编号','关键字'))
ss= [
 ('1','牛牛'),('2','百度'),('3','京东')
]
ccs = ('4','自己博客')
writer.writerows(ss)
writer.writerow(ccs)
csvfile.close()