FileExistsError：[WinError 183] 当文件已存在时无法创建文件

Question

I have a main "MAIN" folder and I would like to create several sub-folders within this called "test_1", "test_2", and so on. I have done the following which successfully creates the "MAIN" folder and "test_1" within the main folder; however, it fails to create the subsequent sub-folders. It raises the following error:

FileExistsError: [WinError 183] Cannot create a file when that file already exists: 'MAIN\\test_1'

I'm not sure where I'm going wrong in my logic and thus, my code. I would really appreciate any assistance on this.

Here's the relevant snippet of my code:

        self.counter = 1
        self.MAIN_folder = "MAIN"
        if not os.path.exists(self.MAIN_folder):
            os.makedirs(self.MAIN_folder)

        self.test_folder = os.path.join(self.MAIN_folder, "test")

        if not os.path.exists(self.test_folder):
            os.makedirs(self.test_folder + "_" + str(self.counter))
        else:
            self.counter += 1
            os.makedirs(self.test_folder + "_" + str(self.counter))

Answer 1

The problem is that you are not checking whether or not the relevant folder exists first. You only check self.test_folder which is never a folder that you create, thus your program continually attempts to create the MAIN/test_1 .