TypeError: Descriptors cannot not be created directly.
时间: 2023-11-22 19:38:10 浏览: 53
TypeError: Descriptors cannot not be created directly. 这个错误通常是由于protobuf版本过低或者生成的代码过时导致的。解决这个问题的方法有几种:
1. 更新protobuf版本到3.19.0或更高版本,并重新生成代码。
2. 如果无法立即重新生成代码,可以尝试降级protobuf包到3.20.x或更低版本。
3. 另一种可能的解决方法是设置环境变量PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python,但这会使用纯Python解析,速度较慢。
相关问题
paddleocr TypeError: Descriptors cannot not be created directly.
paddleocr报错"TypeError: Descriptors cannot not be created directly." 是因为protobuf的版本太高导致编译错误。解决该问题的方法是按照编译器提示的信息下载protobuf的3.19.0版本,可以使用以下命令进行安装:pip install protobuf==3.19.0。
typeerror: descriptors cannot not be created directly. if this call came fro
m a program or script, it means that there is an issue with the way descriptors are being created.
Descriptors are a way to define attributes in classes that allow special behaviors when accessing or assigning values to those attributes. They are typically used to control and validate data access.
The error message "TypeError: descriptors cannot be created directly" usually occurs when trying to directly create a descriptor object without using it within a class definition. Descriptors need to be defined as attributes in a class and then accessed through instances of that class.
To resolve this error, you need to make sure that you are defining your descriptors properly within a class structure. Here is an example of how to correctly define a descriptor:
```python
class Descriptor:
def __get__(self, instance, owner):
# Define behavior when the attribute is accessed
return instance._value
def __set__(self, instance, value):
# Define behavior when the attribute is assigned a value
if value < 0:
raise ValueError("Value cannot be negative")
instance._value = value
class MyClass:
attribute = Descriptor()
# Usage:
obj = MyClass()
obj.attribute = 10
print(obj.attribute) # Output: 10
obj.attribute = -5 # Raises ValueError
```
In this example, the `Descriptor` class defines the behavior of the `attribute` in `MyClass`. The `__get__` method specifies what happens when the attribute is accessed, and the `__set__` method specifies what happens when a value is assigned to the attribute.
Remember to always define descriptors within a class and access them through instances of that class to avoid the "TypeError: descriptors cannot be created directly" error.