sed从文件中删除URL
我正在尝试编写一个sed表达式,可以从文件中删除URL 范例sed从文件中删除URL,sed,Sed,我正在尝试编写一个sed表达式,可以从文件中删除URL 范例 http://samgovephotography.blogspot.com/ updated my blog just a little bit ago. Take a chance to check out my latest work. Hope all is well:) Meet Former Child Star & Author Melissa Gilbert 6/15/09 at LA's B&
http://samgovephotography.blogspot.com/ updated my blog just a little bit ago. Take a chance to check out my latest work. Hope all is well:)
Meet Former Child Star & Author Melissa Gilbert 6/15/09 at LA's B&N https://hollywoodmomblog.com/?p=2442 Thx to HMB Contributor @kdpartak :)
但我不明白:
sed 's/[\w \W \s]*http[s]*:\/\/\([\w \W]\)\+[\w \W \s]*/ /g' posFile
已修复强>
处理几乎所有情况,甚至是格式错误的URL
sed 's/[\w \W \s]*http[s]*[a-zA-Z0-9 : \. \/ ; % " \W]*/ /g' positiveTweets | grep "http" | more
下面将删除
http://
或https://
以及下一个空格之前的所有内容:
sed -e 's!http\(s\)\{0,1\}://[^[:space:]]*!!g' posFile
updated my blog just a little bit ago. Take a chance to check out my latest work. Hope all is well:)
Meet Former Child Star & Author Melissa Gilbert 6/15/09 at LA's B&N Thx to HMB Contributor @kdpartak :)
编辑:
$ cat url_test_input.txt
Some text ...
https://stackoverflow.com/questions/4283344/sed-to-remove-urls-from-a-file
https://www.google.ca/search?dcr=0&ei=QCsyWtbYF43YjwPpzKyQAQ&q=python+remove++citations&oq=python+remove++citations&gs_l=psy-ab.3...1806.1806.0.2004.1.1.0.0.0.0.61.61.1.1.0....0...1c.1.64.psy-ab..0.0.0....0.-cxpNc6youY
http://scikit-learn.org/stable/modules/generated/sklearn.feature_extraction.text.TfidfVectorizer.html
https://bbengfort.github.io/tutorials/2016/05/19/text-classification-nltk-sckit-learn.html
http://datasynce.org/2017/05/sentiment-analysis-on-python-through-textblob/
https://www.google.ca/?q=halifax&gws_rd=cr&dcr=0&ei=j7UyWuGKM47SjwOq-ojgCw
http://www.google.ca/?q=halifax&gws_rd=cr&dcr=0&ei=j7UyWuGKM47SjwOq-ojgCw
www.google.ca/?q=halifax&gws_rd=cr&dcr=0&ei=j7UyWuGKM47SjwOq-ojgCw
ftp://ftp.ncbi.nlm.nih.gov/
ftp://ftp.ncbi.nlm.nih.gov/1000genomes/ftp/alignment_indices/20100804.alignment.index
Some more text.
$ sed -e 's/http[s]\?:\/\/\S*//g ; s/www\.\S*//g ; s/ftp:\S*//g' url_test_input.txt > a
$ cat a
Some text ...
Some more text.
$ perl -i -pe 's/^'`echo "\012"`'${2,}//g' a
Some text ...
Some more text.
$
我应该使用:
sed -e 's!http[s]\?://\S*!!g' posFile
“[s]\?
”是一种比“\(s\){0,1\}
”更具可读性的书写“可选的s
”的方式
“\S*
”比“[^[:space:][]*
更可读的“任何非空格字符”版本”
在我写这个答案时,我一定是在使用Mac电脑附带的sed
(brew install gnu sed
FTW)
有更好的URL正则表达式(例如,考虑HTTP以外的方案的URL正则表达式),但考虑到您给出的示例,这将对您有效。为什么要把事情复杂化?公认的答案提供了我用来从文件中删除URL等的方法。然而,它留下了“空白”行。这里有一个解决方案
sed -i -e 's/http[s]\?:\/\/\S*//g ; s/www\.\S*//g ; s/ftp:\S*//g' input_file
perl -i -pe 's/^'`echo "\012"`'${2,}//g' input_file
使用的GNU sed标志和表达式包括:
-i Edit in-place
-e [-e script] --expression=script : basically, add the commands in script
(expression) to the set of commands to be run while processing the input
^ Match start of line
$ Match end of line
? Match one or more of preceding regular expression
{2,} Match 2 or more of preceding regular expression
\S* Any non-space character; alternative to: [^[:space:]]*
-p Places a printing loop around your command,
so that it acts on each line of standard input
-i Edit in-place
-e Allows you to provide the program as an argument,
rather than in a file
但是,
sed -i -e 's/http[s]\?:\/\/\S*//g ; s/www\.\S*//g ; s/ftp:\S*//g'
保留非打印字符,可能是\n
(换行符)。基于标准sed
的删除“空白”行、制表符和空格的方法,例如
sed -i 's/^[ \t]*//; s/[ \t]*$//'
此处不工作:如果不使用“分支标签”处理换行符,则不能使用sed(一次读取一行输入)替换它们
解决方案是使用以下perl表达式:
perl -i -pe 's/^'`echo "\012"`'${2,}//g'
它使用了壳替换
“`echo”\012”`
\012
\n
),出现2次或更多次
- {2,}
/
-i Edit in-place
-e [-e script] --expression=script : basically, add the commands in script
(expression) to the set of commands to be run while processing the input
^ Match start of line
$ Match end of line
? Match one or more of preceding regular expression
{2,} Match 2 or more of preceding regular expression
\S* Any non-space character; alternative to: [^[:space:]]*
-p Places a printing loop around your command,
so that it acts on each line of standard input
-i Edit in-place
-e Allows you to provide the program as an argument,
rather than in a file
参考资料:
- perl标志:
- ASCII控制代码:
- 删除URL:
- 分支标签:
- GNU sed手册:
- 快速正则表达式指南:
示例:
$ cat url_test_input.txt
Some text ...
https://stackoverflow.com/questions/4283344/sed-to-remove-urls-from-a-file
https://www.google.ca/search?dcr=0&ei=QCsyWtbYF43YjwPpzKyQAQ&q=python+remove++citations&oq=python+remove++citations&gs_l=psy-ab.3...1806.1806.0.2004.1.1.0.0.0.0.61.61.1.1.0....0...1c.1.64.psy-ab..0.0.0....0.-cxpNc6youY
http://scikit-learn.org/stable/modules/generated/sklearn.feature_extraction.text.TfidfVectorizer.html
https://bbengfort.github.io/tutorials/2016/05/19/text-classification-nltk-sckit-learn.html
http://datasynce.org/2017/05/sentiment-analysis-on-python-through-textblob/
https://www.google.ca/?q=halifax&gws_rd=cr&dcr=0&ei=j7UyWuGKM47SjwOq-ojgCw
http://www.google.ca/?q=halifax&gws_rd=cr&dcr=0&ei=j7UyWuGKM47SjwOq-ojgCw
www.google.ca/?q=halifax&gws_rd=cr&dcr=0&ei=j7UyWuGKM47SjwOq-ojgCw
ftp://ftp.ncbi.nlm.nih.gov/
ftp://ftp.ncbi.nlm.nih.gov/1000genomes/ftp/alignment_indices/20100804.alignment.index
Some more text.
$ sed -e 's/http[s]\?:\/\/\S*//g ; s/www\.\S*//g ; s/ftp:\S*//g' url_test_input.txt > a
$ cat a
Some text ...
Some more text.
$ perl -i -pe 's/^'`echo "\012"`'${2,}//g' a
Some text ...
Some more text.
$
在处理URL、文件路径等时,我更喜欢使用“|”作为sed分隔符,这样就不必转义/。示例:sed的|/path/to/some/file/|/newpath/to/new/file/| g'@JP19,喜欢的话,会尝试一下这个方法。约翰西韦布,你能解释一下你的sed表达式吗?特别是{0,1}符号。感谢Mac的评论。我在mac电脑上测试了10分钟完全有效的正则表达式,然后我阅读了你的答案,并在centos机器上试用了它,这是我第一次使用它。对于任何想知道
的人来说!!g'
bit在编辑过的答案中,它只是一种转义所附文本的方法。根据我的测试,sed-e的!http[s]\?://\s*!!g'
似乎与sed-e的/http[s]\?:\/\/\s*//g'