TypeError: ToTensor.init() takes 1 positional argument but 2 were given

时间: 2023-12-05 15:36:44 浏览: 334

第十一天 04魔法方法【千锋Python人工智能学院】1

在Python编程中，魔法方法（Magic Methods）是类中具有特殊功能的方法，它们的名字以两个下划线开头和结尾，例如`__init__`、`__del__`和`__str__`等。这些方法在特定场景下会被Python解释器自动调用，以实现特定的行为。 1. `__init__`方法：这个方法在创建对象时自动调用，用于初始化对象的属性。在示例中，`Cat`类的`__init__`方法接受一个参数`name`，并将其赋值给`self.name`。创建`Cat`对象时，必须提供`name`参数，否则会引发TypeError。`self`参数在类内部表示当前对象，Python解释器会自动将新创建的对象引用传递给`self`。 2. 对象属性与方法：每个对象都有自己的属性存储空间，这意味着即使有多个对象，它们的属性也是独立的。而方法是所有对象共享的，它们只占用一份内存空间。当我们调用方法时，通过`self`来确定是哪个对象在调用该方法。 3. `__del__`方法：当对象不再被引用，即将被垃圾回收时，Python解释器会调用`__del__`方法。在`Student`类中，`__del__`方法会在对象销毁前被调用，通常用来执行清理工作。 4. `__str__`方法：此方法用于返回对象的可打印描述。当使用`print()`函数打印对象时，实际上是调用了对象的`__str__`方法。默认情况下，它会打印类名和对象的内存地址。如果需要自定义输出格式，可以重写`__str__`方法，如`Person`类所示。在`Student`类的例子中，如果要显示对象的所有属性，可以重写`__str__`方法，如下： ```python class Student: def __init__(self, name, score): self.name = name self.score = score def __str__(self): return f"Name: {self.name}, Score: {self.score}" student1 = Student('Alice', 90) print(student1) # 输出 "Name: Alice, Score: 90" ``` 这样，当我们打印`student1`对象时，就会得到一个包含`name`和`score`属性的字符串描述。总结来说，魔法方法在Python中扮演着关键角色，它们提供了类和对象的默认行为，如初始化、销毁和打印等。开发者可以通过重写这些方法来定制类的行为，以满足特定的需求。在实际编程中，理解和运用这些魔法方法能够提高代码的可读性和可维护性。

这个错误通常是因为在实例化 ToTensor 类时传入了多余的参数。ToTensor 类是 PyTorch 中用于将 PIL 图像或 numpy 数组转换为张量的类。正确的用法是直接实例化 ToTensor 类，例如： ``` from torchvision.transforms import ToTensor transform = ToTensor() ``` 如果还是出现这个错误，可能是因为代码中有其他地方出现了问题。可以检查一下代码中是否有其他地方也使用了 ToTensor 类，并且传入了多余的参数。

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TypeError: ToTensor.__init__() takes 1 positional argument but 2 were given

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Traceback (most recent call last): File "C:\Users\sxq\PycharmProjects\pythonProject\main.py", line 95, in <module> imgnew=torchvision.transforms.ToTensor(image) TypeError: ToTensor.__init__() takes 1 positional argument but 2 were given

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TypeError: ToTensor.init() takes 1 positional argument but 2 were given

Traceback (most recent call last): File "C:\Users\sxq\PycharmProjects\pythonProject\main.py", line 95, in <module> imgnew=torchvision.transforms.ToTensor(image) TypeError: ToTensor.init() takes 1 positional argument but 2 were given

TypeError: LogisticRegression.init() takes 1 positional argument but 2 were given

TypeError: Document.init() takes 1 positional argument but 2 were given

TypeError: BasePage.init() takes 1 positional argument but 2 were given

TypeError: Connection.init() takes 1 positional argument but 2 were given

TypeError: Talking.init() takes 1 positional argument but 2 were given

TypeError: Net.init() takes 1 positional argument but 5 were given

typeerror: connection.init() takes 1 positional argument but 5 were given

python 连接数据库报错 TypeError: Connection.init() takes 1 positional argument but 2 were given

TypeError: DecisionTreeClassifier.init() takes 1 positional argument but 2 positional arguments (and 1 keyword-only argument) were given

TypeError: Ods_Updater.init() takes 1 positional argument but 2 were given

apk = APK(file) ^^^^^^^^^ TypeError: APK.init() takes 1 positional argument but 2 were given

roc_display = RocCurveDisplay (X_test, y_test).plot() TypeError: RocCurveDisplay.init() takes 1 positional argument but 3 were given

TypeError:init takes 1 positional argument but 5 were given

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db = pymysql.connect('localhost','root','123456','face01') TypeError: Connection.init() takes 1 positional argument but 5 were given错误意思