Question

我需要帮助解决Python 3.6.5代码的奇怪问题。 错误仅在我的项目执行期间产生，我没有成功在另一个脚本执行期间重新创建它... 我想在__init__函数中创建一些文件夹到一些类中，使用os.makedirs：

self.working_folder = Preprocessor.prepare_folder(working_folder)  # create final working folder
self.previews_folder = Preprocessor.prepare_folder(previews_folder)  # create previews folder

此处创建“working_folder”而不是“previews_folder”，没有任何错误。 如果我尝试这段代码：

self.working_folder = Preprocessor.prepare_folder(working_folder)  # create final working folder
Preprocessor.prepare_folder(previews_folder)  # create previews folder

两个文件夹都已正确创建。

有关“Preprocessor.prepare_folder”的详细信息：

    def prepare_folder(folder_path):
    print("Path to create: ", folder_path)
    while True:
        try:
            os.makedirs(folder_path)
            print("Folder created as: ", folder_path)
            return folder_path
        except FileExistsError:
            if folder_path[-1] in ("/", "\\"):
                folder_path = folder_path[:len(folder_path) - 1]
            if folder_path[-1].isdigit():
                temp = folder_path[-1]
                for i in range(len(folder_path) - 2, -1, -1):
                    try:
                        if folder_path[i].isdigit():
                            temp = folder_path[i] + temp
                        else:
                            folder_path = folder_path[:i + 1]
                            break
                    except IndexError:
                        raise EnvironmentError
                folder_path = folder_path + str(int(temp) + 1)
            else:
                folder_path += '1'

操作系统：Windows 10 x64系列

回溯：

Path to create:  C:\Users\MPuis\Downloads\Tests\classifier_temp
Folder created as:  C:\Users\MPuis\Downloads\Tests\classifier_temp
Path to create:  C:\Users\MPuis\Downloads\Tests\previews_temp
Folder created as:  C:\Users\MPuis\Downloads\Tests\previews_temp

Process finished with exit code 0

带“dir”命令的DOS终端：

Répertoire de C:\Users\MPuis\Downloads\Tests

11/04/2018  23:42    <DIR>          .
11/04/2018  23:42    <DIR>          ..
11/04/2018  23:42    <DIR>          classifier_temp
10/04/2018  12:18    <DIR>          Models
10/04/2018  13:12    <DIR>          To_sort
               0 fichier(s)                0 octets
               5 Rép(s)  113 340 448 768 octets libres

最小类样本（正确创建两个文件夹，未成功重新创建问题，但这些是相同的类，值和相关功能，而不是其他不起作用）

""" A script sample of error """

if __name__ == '__main__':
    import os

    output_folder = os.path.abspath("C:/Users/MPuis/Downloads/Tests/Models")


    class Preprocessor:
        # ---- Settings ----
        default_wfolder = 'classifier_temp'
        default_previews = 'previews_temp'

        def __init__(self, target_folder, working_folder=default_wfolder, previews_folder=default_previews):
            if working_folder == Preprocessor.default_wfolder:
                working_folder = os.path.join(os.path.dirname(os.path.abspath(target_folder)), working_folder)
            if previews_folder == Preprocessor.default_previews:
                previews_folder = os.path.join(os.path.dirname(os.path.abspath(target_folder)), previews_folder)
            self.target_folder = target_folder
            self.working_folder = Preprocessor.prepare_folder(working_folder)  # create final working folder

            # Error with this statement
            self.previews_folder = Preprocessor.prepare_folder(previews_folder)  # create previews folder

        @staticmethod
        def prepare_folder(folder_path):
            print("Path to create: ", folder_path)
            while True:
                try:
                    os.makedirs(folder_path)
                    print("Folder created as: ", folder_path)
                    return folder_path
                except FileExistsError:
                    print("File exists")
                    return None


    test = Preprocessor(target_folder=output_folder)
    print("Script done")

您对这个奇怪的问题有什么建议吗？谢谢你的帮助！

修改经过一些测试，我尝试了这段代码：

self.working_folder = Preprocessor.prepare_folder(working_folder)  # create final working folder
self.previews_folder = Preprocessor.prepare_folder(previews_folder)  # create previews folder
os.makedirs(self.previews_folder)

然后我发现了一个错误：“FileExistsError：[WinError 183]”，但是进入DOS终端的“dir”命令写的结果与先前的测试结果相同......

Answer 1

比较班级样本和生产类后问题已解决（按照wwii的建议）在我的类预处理器中，显然是__del__函数在退出之前删除了“previews_folder”。

谢谢大家的帮助

Python 3.6.5 - os.makedirs / os.mkdir不会创建没有任何错误的目录

1 个答案: