pychTypeError: Descriptors cannot not be created directly.
时间: 2023-09-18 11:16:17 浏览: 48
这个错误通常是因为在创建描述符时出现了问题。描述符是一种用于控制属性访问的特殊对象,它们通常用于定义属性的行为。
要创建一个描述符,你需要定义一个类,并在该类中实现特定的协议方法,例如`__get__()`、`__set__()`和`__delete__()`。这些方法控制着属性的获取、设置和删除操作。
下面是一个简单的示例,展示了如何创建一个描述符类:
```python
class Descriptor:
def __get__(self, instance, owner):
# 实现获取属性值的逻辑
pass
def __set__(self, instance, value):
# 实现设置属性值的逻辑
pass
def __delete__(self, instance):
# 实现删除属性的逻辑
pass
```
请确保在创建描述符时正确地实现了这些方法。如果你在创建描述符时出现了该错误,请检查你的代码并确保遵循了描述符协议。
相关问题
TypeError: Descriptors cannot not be created directly.
This error occurs when you try to create descriptors directly instead of using them as part of a class definition. Descriptors are special objects that are used to define attributes of a class, and they need to be defined within the class definition.
For example, if you want to define a descriptor for a specific attribute of a class, you would define it like this:
```
class MyDescriptor:
def __get__(self, instance, owner):
# code to get the attribute value
pass
def __set__(self, instance, value):
# code to set the attribute value
pass
class MyClass:
my_attr = MyDescriptor()
```
In this example, `MyDescriptor` is defined within the class definition of `MyClass`, and `my_attr` is an attribute of `MyClass` that is defined using `MyDescriptor`.
If you try to create `MyDescriptor` outside of the class definition, you will get the "TypeError: Descriptors cannot not be created directly" error:
```
my_descriptor = MyDescriptor() # TypeError: Descriptors cannot not be created directly
```
TypeError: Descriptors cannot not be created directly
TypeError: Descriptors cannot not be created directly是一个错误信息,它通常出现在运行深度学习python程序时,如mmdetection、mmdetection3d等程序中。这个错误提示意味着不能直接创建descriptors(描述符)。
解决这个问题的方法是重新安装pyqt5,可以使用以下命令进行安装:pip install protobuf==pyqt5。另外,也可以尝试降级protobuf包到3.20.x或更低版本,或者设置PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python来使用纯Python解析,但会导致解析速度变慢。
需要注意的是,如果此错误提示来自_pb2.py文件,那么可能是生成的代码已过时,需要使用protoc >= 3.19.0重新生成protos文件。如果无法立即重新生成protos文件,可以尝试上述提到的其他解决方法。
希望这些信息能帮助你解决TypeError: Descriptors cannot not be created directly的问题。如果还有其他问题,请随时提问。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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