Python 多个文件（从起始行和结束行删除相同的字符串）

我有多个文件。每个文件的格式如下所示：

<float> <int> <stringSAME>
<float> <int> <stringSAME>
<float> <int> <string>
......
<float> <int> <stringSAME>
......
......
<float> <int> <string>
<float> <int> <stringSAME>
<float> <int> <stringSAME>

......
......
......

此处，第1行和第2行中的字符串与最后几行中的字符串相同。它被表示为stringSAME。现在我想从文件的开头和结尾删除这个字符串。但在这两者之间保持不变。本程序适用于具有相同格式的多个文件。

---

请提出一些解决办法。我正在使用python作为我的编程语言

有几种方法可以做到这一点，具体取决于您以后想如何使用它

如果您只是想将这些行用作数据，我们可以：

with open("path/to/file") as f:
    data = (line for line in f if not line.endswith("<stringSAME>"))

您还可以将其写入文件的新副本：

with open("path/to/sanitized_file","w") as f:
    for line in data:
        f.write(line+"\n")

如果您试图在多个文件上执行此操作，请首先构建一个列表

import os

list_of_files = ["file1.txt","file2.txt","file3.txt"]
for file in list_of_files:
    in_file = os.path.join("path","to",file)
    out_file = os.path.join("path","to","post proc",file)

# if you have to do it to a whole directory worth of files, try this instead
## import glob
## list_of_files = glob.glob("path/to/dir/*")
## for file in list_of_files:
##     in_file = file
##     head,tail = os.path.split(file)
##     out_file = os.path.join(head,"post proc",tail)
# which simplifies a lot of the following, since none of the FileNotFoundErrors
# should ever trigger, other than the one in case the post proc directory
# doesn't exist

    try:
        with open(in_file, 'r') as f:
            data = (line for line in f if not line.endswith("<stringSAME>"))
    except IOError as e:
        # log and handle error if you can't open file
    except FileNotFoundError as e:
        # log and handle error if the file isn't there
    try:
        with open(out_file,'w') as f:
            for line in data:
                f.write(line+"\n")
    except IOError as e:
        # log and handle error if you can't write to file
    except FileNotFoundError as e:
        # log and handle error if the directory doesn't exist

导入操作系统
文件列表=[“file1.txt”、“file2.txt”、“file3.txt”]
对于\u文件列表中的文件：
in_file=os.path.join（“path”，“to”，file）
out\u file=os.path.join（“path”、“to”、“post-proc”、file）
#如果必须对整个目录的文件执行此操作，请尝试此操作
##导入glob
##文件列表=glob.glob（“path/to/dir/*”）
##对于\u文件列表中的文件：
##in_file=file
##head，tail=os.path.split（文件）
##out\u file=os.path.join（head，“post-proc”，tail）
#这简化了以下许多操作，因为没有FileNotFound错误
#应该触发，而不是在post proc目录中触发
#不存在
尝试：
将打开的（在_文件中，'r'）作为f：
数据=（如果不是line.endswith（“”），则f中的行对应一行）
除IOE错误外：
#如果无法打开文件，请记录并处理错误
除FileNotFoundError为e外：
#如果文件不存在，则记录并处理错误
尝试：
打开（out_文件，'w'）作为f：
对于行输入数据：
f、 写入（第+行“\n”）
除IOE错误外：
#如果无法写入文件，请记录并处理错误
除FileNotFoundError为e外：
#如果目录不存在，则记录并处理错误

是要删除整行还是仅删除部分？是的，我要删除整行！因此，对于文件中以

结尾的任何行，我们要删除该行吗？这很简单，但我想确保我们的观点一致。是的！这些都存在于同一文件中上述代码不工作ValueError:关闭时的I/O操作file@U-检查你的缩进

f

仅在

with

块中打开，因此如果缩进减少了1，则在缩进关闭后，您将尝试读取（或写入）

f

。

import os

list_of_files = ["file1.txt","file2.txt","file3.txt"]
for file in list_of_files:
    in_file = os.path.join("path","to",file)
    out_file = os.path.join("path","to","post proc",file)

# if you have to do it to a whole directory worth of files, try this instead
## import glob
## list_of_files = glob.glob("path/to/dir/*")
## for file in list_of_files:
##     in_file = file
##     head,tail = os.path.split(file)
##     out_file = os.path.join(head,"post proc",tail)
# which simplifies a lot of the following, since none of the FileNotFoundErrors
# should ever trigger, other than the one in case the post proc directory
# doesn't exist

    try:
        with open(in_file, 'r') as f:
            data = (line for line in f if not line.endswith("<stringSAME>"))
    except IOError as e:
        # log and handle error if you can't open file
    except FileNotFoundError as e:
        # log and handle error if the file isn't there
    try:
        with open(out_file,'w') as f:
            for line in data:
                f.write(line+"\n")
    except IOError as e:
        # log and handle error if you can't write to file
    except FileNotFoundError as e:
        # log and handle error if the directory doesn't exist