Question

我有一个CSV文件，由于,,分隔符，每隔一列产生一个空列。我正在尝试删除这些空列，但我无法弄清楚如何循环遍历行并将,,替换为,。

任何通过线路循环并替换分隔符的帮助将非常感激。

谢谢！

示例数据：

Year,,2005-12,,2006-12,,2007-12,,2008-12,,2009-12,,2010-12,,2011-12,,2012-12,,2013-12,,2014-12,,TTM
Data1,,100.00,,100.00,,100.00,,100.00,,100.00,,100.00,,100.00,,100.00,,100.00,,100.00,,100.00
    ....

Answer 1

您可以使用pysed：

从命令行执行此操作

https://pypi.python.org/pypi/pysed

(stackoverflow)macbook:stackoverflow joeyoung$ pip install pysed
(stackoverflow)macbook:stackoverflow joeyoung$ cat file.csv 
Year,,2005-12,,2006-12,,2007-12,,2008-12,,2009-12,,2010-12,,2011-12,,2012-12,,2013-12,,2014-12,,TTM
Data1,,100.00,,100.00,,100.00,,100.00,,100.00,,100.00,,100.00,,100.00,,100.00,,100.00,,100.00
(stackoverflow)macbook:stackoverflow joeyoung$ pysed -r ",," "," file.csv --write
(stackoverflow)macbook:stackoverflow joeyoung$ cat file.csv 
Year,2005-12,2006-12,2007-12,2008-12,2009-12,2010-12,2011-12,2012-12,2013-12,2014-12,TTM
Data1,100.00,100.00,100.00,100.00,100.00,100.00,100.00,100.00,100.00,100.00,100.00

Answer 2

如果你想通过python实现它，那么使用replace方法。

>>> s = 'year,,2015-12,,2006-12'
>>> print(s)
year,,2015-12,,2006-1
>>> new_s = s.replace(",,",",")
>>> print(new_s)
year,2015-12,2006-12

Answer 3

使用csv模块：

import csv

input = open('in.csv', 'rb')
output = open('out.csv', 'wb')
writer = csv.writer(output)

for read in csv.reader(input):
    writer.writerow([x for x in read if x]) #Removes empty fields and writes into new file

input.close()
output.close()

虽然输入csv文件非常大，但我认为这不是一个最佳解决方案。

使用python替换CSV文件中的字符/分隔符（双逗号）

3 个答案: