【python】写csv文件时遇到的错误

时间:2022-07-18 21:07:58

1.错误

在许多文件中,写入csv文件时都加"wb",w指写入,b指二进制

如:

csvwrite=csv.writer(open("output.csv","wb"))
Temp=["row1","row2","row3",]
csvwrite.writerow(Temp)
或者是
#!/usr/bin/env python
#coding:utf-8 import csv
#csv写数据
def writeCsv(file_name="C:\\Users\\Administrator\\Desktop\\test.csv"):
with open(file_name,'wb') as f:
writer=csv.writer(f)
writer.writerow(['element','system'])
data=[
('selenium','webdriver'),
('appium','android'),
('appium','ios'),
('selenium','python')]
writer.writerows(data)
f.close() if __name__=='__main__':
writeCsv()
#print(getCsv(0,0))

运行结果都会出错:

TypeError: a bytes-like object is required, not 'str'
Traceback (most recent call last):
File "E:\automatic\sc\data_driven_test\ddt_test.py", line 29, in <module>
writeCsv()
File "E:\automatic\sc\data_driven_test\ddt_test.py", line 9, in writeCsv
writer.writerow(['element','system'])
TypeError: a bytes-like object is required, not 'str'
[Finished in 0.4s]

2.解决方法

写入时只添加“w”而不是“wb”

将上述代码改为:with open(file_name,'w') as f:

可执行通过,但是打开csv文件会发现每一行后面都会多一行空行

【python】写csv文件时遇到的错误

只需将代码改为 with open(file_name,'w',”newline='') as f:

【python】写csv文件时遇到的错误