Python从文件中提取数据

我正在尝试提取具有特定文本文件的文本:

---- 
data1 
data1 
data1 
extractme 
---- 
data2 
data2 
data2 
---- 
data3 
data3 
extractme 
---- 

然后转存到文本文件中

---- 
data1 
data1 
data1 
extractme 
--- 
data3 
data3 
extractme 
--- 

感谢您的帮助。

请您参考如下方法:

这对我来说效果很好。您的示例数据位于名为“data.txt”的文件中，输出转到“result.txt”

inFile = open("data.txt") 
outFile = open("result.txt", "w") 
buffer = [] 
keepCurrentSet = True 
for line in inFile: 
    buffer.append(line) 
    if line.startswith("----"): 
        #---- starts a new data set 
        if keepCurrentSet: 
            outFile.write("".join(buffer)) 
        #now reset our state 
        keepCurrentSet = False 
        buffer = [] 
    elif line.startswith("extractme"): 
        keepCurrentSet = True 
inFile.close() 
outFile.close()