Python中的For循环结构

在python中是否可以有for循环的以下逻辑

with  open("file_r", "r") as infile, open("file_1", 'w') as outfile_1, open("file_2", 'w') as outfile_2: 
    for result in re.findall('somestring(.*?)\}', infile.read(), re.S):
       for line in result.split('\n'):
           outfile_1.write(line) 

    for result in re.findall('sime_other_string(.*?)\}', infile.read(), re.S):
       for line in result.split('\n'):
           outfile_2.write(line)

---

我这样问是因为第一个foor循环的结果被写入“outfile_1”文件，但第二个循环的结果在“outfile_2”文件中是空的。

仅当您在读取之间再次“倒带”

infle

到开始：

... infile.read()

infile.seek(0)

... infile.read()

文件很像录音带；读取时，读取“头”沿磁带移动并返回数据

file.seek（）

不过，您最好只阅读一次该文件：

将
infle.read（）
保存到变量中，否则文件将在第一个循环中完成。说：

with  open("file_r", "r") as infile, open("file_1", 'w') as outfile_1, open("file_2", 'w') as outfile_2: 
    contents = infile.read()

    for result in re.findall('somestring(.*?)\}', contents, re.S):
       for line in result.split('\n'):
           outfile_1.write(line) 

    for result in re.findall('sime_other_string(.*?)\}', contents, re.S):
       for line in result.split('\n'):
           outfile_2.write(line)

你可以用理解来简化这两个循环！太多了！！现在可以将infle.read（）保存为变量！
with  open("file_r", "r") as infile, open("file_1", 'w') as outfile_1, open("file_2", 'w') as outfile_2: 
    contents = infile.read()

    for result in re.findall('somestring(.*?)\}', contents, re.S):
       for line in result.split('\n'):
           outfile_1.write(line) 

    for result in re.findall('sime_other_string(.*?)\}', contents, re.S):
       for line in result.split('\n'):
           outfile_2.write(line)