通过以 TO 开头的每一行来编辑文本文件答案

【问题标题】：Edit a text file by starting each line with TO通过以 TO 开头的每一行来编辑文本文件
【发布时间】：2013-06-28 22:50:40
【问题描述】：

我正在尝试使用 sed 编辑文本文件。该文本文件实际上是一条短信，它以 .txt 格式发送到我的电子邮件，但格式并不美观。提前感谢您的任何帮助。例如，一个特定的行：

TO YOUDate : 06/12/2013 09:52:55 AMHi can u pls pick up some bread from the store. TO :   Contact NameDate : 06/12/2013 10:00:10 AMI can in about 15 minutes. I'm still in a meeting.

以上行表示 .txt 文件中其余行的格式。我希望这些行以 TO 开头并以该行的完成结束（直到下一个 TO）。

像这样：

TO YOUDate : 06/12/2013 09:52:55 AMHi can u pls pick up some bread from the store.
TO :   Contact NameDate : 06/12/2013 10:00:10 AMI can in about 15 minutes. I'm still in a meeting.

我认为以下命令对我有用，但它在找到 TO 后会创建一个新行。

sed '/TO/ a\
new line string' myfile.txt

【问题讨论】：

标签： python unix sed awk

【解决方案1】：

sed 's|TO|\nTO|g'

最后一个参数“g”将全局替换“TO”。所以请确保消息中不包含“TO”字符串。

【讨论】：

【解决方案2】：

这将在第二次出现 TO 时插入换行符

sed 's/TO/\nTO/2' myFile.txt

测试：

temp_files > cat myFile.txt
TO YOUDate : 06/12/2013 09:52:55 AMHi can u pls pick up some bread from the store. TO :   Contact NameDate : 06/12/2013 10:00:10 AMI can in about 15 minutes. I'm still in a meeting.
temp_files >
temp_files > sed 's/TO/\nTO/2' myFile.txt
TO YOUDate : 06/12/2013 09:52:55 AMHi can u pls pick up some bread from the store.
TO :   Contact NameDate : 06/12/2013 10:00:10 AMI can in about 15 minutes. I'm still in a meeting.

【讨论】：

【解决方案3】：

使用python：

>>> import re
>>> spl = "TO"
>>> strs = "TO YOUDate : 06/12/2013 09:52:55 AMHi can u pls pick up some bread from the store. TO :   Contact NameDate : 06/12/2013 10:00:10 AMI can in about 15 minutes. I'm still in a meeting."
>>> lis = re.split(r'\bTO\b',strs)[1:]
for x in lis:
    print "{}{}".format(spl,x)
...     
TO YOUDate : 06/12/2013 09:52:55 AMHi can u pls pick up some bread from the store. 
TO :   Contact NameDate : 06/12/2013 10:00:10 AMI can in about 15 minutes. I'm still in a meeting.

【讨论】：