Python中的csv模块

写文件

写法1

import csv

csvfile=open('temp/csvfile.csv', 'w', newline='')
writer=csv.writer(csvfile)
writer.writerow('a')
writer.writerow('b')
csvfile.close()

写法2

import csv

with open('temp/csvfile.csv', 'w', newline='') as f:
    writer = csv.writer(f)
    writer.writerow('a')
    writer.writerow('b')

读文件

写法1

csvfile=open('temp/csvfile.csv', 'r', newline='')
txtdata=csvfile.read()
print(type(txtdata))
print(txtdata)
csvfile.close()

写法2

with open('temp/csvfile.csv', 'r', newline='') as f:
    txtdata = f.read()
    print(type(txtdata))
    print(txtdata)

终端的命令行及输出结果

<user>python test.py
<class 'str'>
a
b

更多：https://blog.youkuaiyun.com/xrinosvip/article/details/82019844

特别注意

If csvfile is a file object, it should be opened with newline=’’.

更多：https://www.jianshu.com/p/0b0337df165a