Question

我有点卡在这个上 - 我必须删除不包含逗号的行（删除），并删除（删除）包含多个逗号的行。我必须用Python编写脚本。我在下面列出了一个文件样本：

Anarchism,Taoism  
Anarchism,Laozi  
Anarchism,Zhuang Zhou  
brigand  
Anarchism,Diogenes of Sinope  
Anarchism,Cynicism philosophy  
Anarchism,Zeno of Citium  
Anarchism,Stoicism

感谢!!!!

Answer 1

所以你想保留只有一个逗号的行

>>> lines = """Anarchism,Taoism
... Anarchism,Laozi
... Anarchism,Zhuang Zhou
... brigand
... Anarchism,Diogenes of Sinope
... Anarchism,Cynicism philosophy
... Anarchism,Zeno of Citium
... Anarchism,Stoicism""".split("\n")
>>> [x for x in lines if x.count(",") == 1]
['Anarchism,Taoism', 'Anarchism,Laozi', 'Anarchism,Zhuang Zhou', 'Anarchism,Diogenes of Sinope', 'Anarchism,Cynicism philosophy', 'Anarchism,Zeno of Citium', 'Anarchism,Stoicism']
>>>

Answer 2

从文件中读取行并将带有1个逗号的行写入结果文件。说“无政府主义，道教” 无政府主义，老子
无政府主义，庄周强盗
无政府主义，Sinope的Diogenes 无政府主义，犬儒主义哲学无政府主义，Citium的芝诺无政府主义，Stoicisms” 存储在“test.txt”文件中。

input = open("c:\\test.txt", "r")
output = open("c:\\result.txt", "w")
for line in input:
    if (line.count(",") == 1):
        print (line)
        output.writelines(line)
input.close()
output.close()

Answer 3

import re
p = re.compile(ur'((?:[^,^\n]*\,){2,}[^,^\n]+\n)|(?![^,^\n]*\,)(?<=\n)([^,^\n]+\n)|^(?![^,^\n]*\,)([^,^\n]+)|(?![^,^\n]*\,)(?<=\n)([^,^\n]+)$', re.DOTALL)
str = u"Anarchism,Taoism  \nAnarchism,Laozi  \nAnarchism,Zhuang Zhou  \nbrigand  \nAnarchism,Diogenes of Sinope  \nAnarchism,Cynicism philosophy  \nAnarchism,Zeno of Citium  \nAnarchism,Stoicism"
str = re.sub(p,'', str)
print str

输出：

Anarchism,Taoism  
Anarchism,Laozi  
Anarchism,Zhuang Zhou  
Anarchism,Diogenes of Sinope  
Anarchism,Cynicism philosophy  
Anarchism,Zeno of Citium  
Anarchism,Stoicism

删除以下行：不包含逗号，或包含多个逗号（在Python中）

3 个答案: