Question

我有一个包含以下行的文件。在这里我想要读取以forw开头的行和结束于.txt之前的行之间的行。使用python脚本将每组提取的行复制到单独的新文件中。

forw l1tt DeleteULPhCH 0
forw l1tt activate 1
forw l1tt DeleteCCB 0 1 0
forw l1tt DeleteDLPhCH 0
BCH_CCB63.txt
DL_BCH_PhCh.txt
forw l1tt setuecontext 100
forw l1tt DeleteCCB 65 1 0
DL_BCH_PhCh.txt

我的输出应该是：

forw l1tt activate 1
forw l1tt DeleteULPhCH 0
forw l1tt activate 1
forw l1tt DeleteCCB 0 1 0
forw l1tt DeleteDLPhCH 0

在一个文件中。

在另一个文件中它应该是：

forw l1tt setuecontext 100
forw l1tt DeleteCCB 65 1 0

我使用了以下python代码：它只提取第一组输出。但是在给出中断条件后我无法提取第二组输出。请任何人尽快帮助我。

fin=open("script.txt","r")
fout=open("output.txt","w")
lines=fin.readlines()
    for line in lines:
        if re.search(r"(.*)(.txt)",line):
           break
        print line
    fout.write(line)
fin.close()
fout.close()

Answer 1

使用简单的天真状态机你可以这样做：

#!/usr/bin/env python


n = 0
output = []
state = 0  # 0 = start, 1 = forw

with open("foo.txt", "r") as f:
    for line in f:
        line = line.strip()
        if "forw" in line:
            state = 1
        if state == 1:
            output.append(line)
            if ".txt" in line:
                state = 0
                with open("{0:d}.txt".format(n), "w") as outf:
                    outf.write("\n".join(output))
                    outf.write(line)
                n += 1
                output = []

生成以下输出文件：

$ cat 0.txt
forw l1tt DeleteULPhCH 0
forw l1tt activate 1
forw l1tt DeleteCCB 0 1 0
forw l1tt DeleteDLPhCH 0
BCH_CCB63.txtBCH_CCB63.txt

$ cat 1.txt
forw l1tt setuecontext 100
forw l1tt DeleteCCB 65 1 0
DL_BCH_PhCh.txtDL_BCH_PhCh.txt

这不完全是你所追求的，但它已经接近了。希望您可以根据自己的需要进行修改。

状态机非常有用！

Answer 2

他似乎不想将'.txt'行包含在创建的文件中

import re
n = 1

with open("script.txt","r") as my_file:
  my_list = []
  for line in my_file.readlines():
    if not re.search(r"(.*)(.txt)",line):
      my_list.append(line)
      with open("output"+str(n)+".txt","w") as out_file:
        for item in my_list:
          out_file.write(item)
    else:
      if my_list:
        my_list=[]
        n += 1

创建文件：

$ cat output1.txt
forw l1tt DeleteULPhCH 0
forw l1tt activate 1
forw l1tt DeleteCCB 0 1 0
forw l1tt DeleteDLPhCH 0

$ cat output2.txt
forw l1tt setuecontext 100
forw l1tt DeleteCCB 65 1 0

如何从文件中提取特定行并将特定行保存到python中的每个新文件中

2 个答案: