Python中通过csv的writerow输出的内容有多余的空行

第一种方法

如下生成的csv文件会有多个空行

import csv

#python2可以用file替代open
with open("test.csv","w") as csvfile:
    writer = csv.writer(csvfile)

    #先写入columns_name
    writer.writerow(["index","a_name","b_name"])
    #写入多行用writerows
    writer.writerows([[,,],[,,],[,,]])

加入newline='' 参数

#coding=utf-
import csv

#python2可以用file替代open
with open("test.csv","wt",newline='') as csvfile:
    writer = csv.writer(csvfile)
    #写入多行用writerows
    writer.writerows([["index","a_name","b_name"],[,,],[,,],[,,]])

这样就不会有空行了。

---

第二种方法：

先写入csv文件，然后读出去掉空行，再写入

with open('E:\\test.csv','wt')as fout:       #生成csv文件,有空行
    cout=csv.DictWriter(fout,list_attrs_head )
    cout.writeheader()
    cout.writerows(list_words)
with open('E:\\test.csv','rt')as fin:  #读有空行的csv文件，舍弃空行
    lines=''
    for line in fin:
        if line!='\n':
            lines+=line
with open('E:\\test.csv','wt')as fout:  #再次文本方式写入，不含空行
    fout.write(lines)

参考：

https://www.crifan.com/python_csv_writer_writerow_redundant_new_line/?utm_source=tuicool&utm_medium=referral

https://blog.csdn.net/langaer/article/details/70052971