Python：NameError：名称未定义，即使已定义

Question

我有下面的代码。 当我尝试运行它时，出现以下错误。 我该如何解决这个问题？ 先谢谢您的帮助：）

    imageList = [f for f in listdir(imageFolder) if isfile(join(imageFolder, f))]
NameError: name 'imageFolder' is not defined

class TestItem:
    current_milli_time = None
    Config = configparser.ConfigParser()
    Config.read("sample.ini")

    accessKey = Config.get("project", "accessKey")
    deploymentID = Config.get("project", "deploymentID")
    imageFolder = Config.get("test", "imageFolder")

    imageList = [f for f in listdir(imageFolder) if isfile(join(imageFolder, f))]
    def ready_upload(self):

if __name__ == '__main__':
    ItemTest= TestItem()
    ItemTest.ready_upload()

Answer 1

您可能正在尝试为您的 class 编写一个构造函数。在这种情况下，您只需将构造函数代码放在特殊方法__init__()下。

class TestItem:
    def __init__(self):
        self.current_milli_time = None
        Config = configparser.ConfigParser()
        Config.read("sample.ini")

        self.accessKey = Config.get("project", "accessKey")
        self.deploymentID = Config.get("project", "deploymentID")
        self.imageFolder = Config.get("test", "imageFolder")

        self.imageList = [f for f in listdir(self.imageFolder) if isfile(join(self.imageFolder, f))]

    def ready_upload(self):
        # do something with self.imageList, etc.

if __name__ == '__main__':
    ItemTest = TestItem()
    ItemTest.ready_upload()