Python。连接1 lin上的特定线路

2024-03-28 22:24:43 发布

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假设我有这个文件:

1
17:02,111
Problem report related to
router

2
17:05,223
Restarting the systems

3
18:02,444
Must erase hard disk
now due to compromised data

我想要这个输出:

^{pr2}$

我一直在bash中尝试,得到了一种封闭的解决方案,但我不知道如何在Python上实现这一点。在

提前谢谢你


Tags: 文件thetoreportnowdueroutererase
3条回答
x="""1
17:02,111
Problem report related to
router

2
17:05,223
Restarting the systems

3
18:02,444
Must erase hard disk
now due to compromised data
or something"""
def repl(matchobj):
    ll=matchobj.group().split("\n")
    return "\n".join(ll[:3])+" "+" ".join(ll[3:])
print re.sub(r"\b\d+\n\d+:\d+,\d+\b[\s\S]*?(?=\n{2}|$)",repl,x)

您可以将re.sub与您自己的自定义替换功能一起使用。在

当且仅当文件与给定示例一致时,此方法效果良好

注意:

There may be a faster way if regex is used and it might also be simpler但想用逻辑的方式来做

代码:

inp=open("output.txt","r")
inp=inp.read().split("\n")
print inp
tempString=""
output=[]
w=0

for s in inp:
    if s:
        if any(c.isalpha() for c in s):
            tempString=tempString+" "+s
        else:
            w=0
            if tempString:
                output.append(tempString.strip())
                tempString=""
            output.append(s)       

    else:
        if tempString:
            output.append(tempString.strip())
            tempString=""
        output.append(" ")
if tempString:
    output.append(tempString.strip())


print "\n".join(output)
out=open("newoutput.txt","w")
out.write("\n".join(output))
out.close()

输入:

^{pr2}$

输出:

1
17:02,111
Problem report related to 2 router

2
17:05,223
Restarting the systems

3
18:02,444
Must erase hard disk now due to compromised data

4
17:02,111
Problem report related to router

如果要删除extea行:

为此,如果行后面没有空行,或者行前面应该有一行与后面的regex ^\d{2}:\d{2},\d{3}\s$匹配的行,则可以为每个like检查2个条件。在

因此,为了在每次迭代中访问下一行,您可以使用^{}从主文件对象创建一个名为temp的文件对象,并对其应用next函数。并使用re.match匹配正则表达式。在

from itertools import tee
import re
with open('ex.txt') as f,open('new.txt','w') as out:
    temp,f=tee(f)
    next(temp)
    try:
        for line in f:
            if next(temp) !='\n' or re.match(r'^\d{2}:\d{2},\d{3}\s$',pre):
                out.write(line)
            pre=line
    except :
        pass

结果:

^{pr2}$

如果要将其余部分连接到第三行:

如果您想将第三行后面的其余行连接到第三行,可以使用下面的正则表达式来查找后跟\n\n或文件结尾($)的所有块:

r"(.*?)(?=\n\n|$)"

然后根据日期格式中的行拆分块,并将部分写入输出文件,但请注意,您需要将第三部分中的新行替换为空格:

在附件公司名称:

1
17:02,111
Problem report related to
router
another line


2
17:05,223
Restarting the systems

3
18:02,444
Must erase hard disk
now due to compromised data
line 5
line 6
line 7

演示:

def splitter(s):
    for x in re.finditer(r"(.*?)(?=\n\n|$)", s,re.DOTALL):
          g=x.group(0)
          if g:
            yield g

import re
with open('ex.txt') as f,open('new.txt','w') as out:
    for block in splitter(f.read()):
        first,second,third= re.split(r'(\d{2}:\d{2},\d{3}\n)',block)
        out.write(first+second+third.replace('\n',' '))

结果:

1
17:02,111
Problem report related to router another line
2
17:05,223
Restarting the systems
3
18:02,444
Must erase hard disk now due to compromised data line 5 line 6 line 7

注:

在这个答案中,splitter函数返回一个生成器,当您处理巨大的文件并拒绝在内存中存储不可用的行时,该生成器非常有效。在

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