inheritance

问题 I have the following class @dataclass_json @dataclass class Source: type: str =None label: str =None path: str = None and the two subclasses: @dataclass_json @dataclass class Csv(Source): csv_path: str=None delimiter: str=';' and @dataclass_json @dataclass class Parquet(Source): parquet_path: str=None Given now the dictionary: parquet={type: 'Parquet', label: 'events', path: '/.../test.parquet', parquet_path: '../../result.parquet'} csv={type: 'Csv', label: 'events', path: '/.../test.csv',

问题 The Keras' documentation describes here how to write a custom layer by inheriting from the Layer class. Now, I have another custom layer CustomLayer , from which I want to inherit. Let's call my new custom layer CustomLayer2 . I guess that the process of inheriting, even though I will not be inheriting from Layer but from CustomLayer , will be the same described in the linked documentation, but I will also inherit the custom functionality of CustomLayer . Anyway, inside this custom layer

问题 The situation: I have multiple classes that should each hold a variable with a configuration hash; a different hash for each class but the same for all instances of a class. At first, i tried like this class A def self.init config @@config = config end def config @@config end end class B < A; end class C < A; end But soon noticed that it wouldn't work that way because @@config is held in the context of A, not B or C, thus: B.init "bar" p B.new.config # => "bar" p C.new.config # => "bar" -

问题 The situation: I have multiple classes that should each hold a variable with a configuration hash; a different hash for each class but the same for all instances of a class. At first, i tried like this class A def self.init config @@config = config end def config @@config end end class B < A; end class C < A; end But soon noticed that it wouldn't work that way because @@config is held in the context of A, not B or C, thus: B.init "bar" p B.new.config # => "bar" p C.new.config # => "bar" -

问题 I am trying to do the following in C#. public class Parent<T> where T : Parent<???> { public T Prop { get; set; } } public class Child : Parent<Child> { } How can I do it? 回答1: This works fine: public class Parent<T> where T : Parent<T> { public T Prop { get; set; } } public class Child : Parent<Child> { } Do be careful with this as c# does not enforce a true Parent / Child relationship. For example, given the above code, it is also legal for me to then do this: public class Stranger : Parent

问题 I am having difficulty understanding one thing in Python.I have been coding in Python from a very long time but there's is something that just struck me today which i struggle to understand So the situation goes like this I have a mixin and a view class Mixin: def get_session(self,request,*args,**kwargs): print(self) #should be the instance passed print(request) #should be the request object passed but it's also an instance class View: def get(self,request,*args,**kwargs): self.get_session

问题 I am having difficulty understanding one thing in Python.I have been coding in Python from a very long time but there's is something that just struck me today which i struggle to understand So the situation goes like this I have a mixin and a view class Mixin: def get_session(self,request,*args,**kwargs): print(self) #should be the instance passed print(request) #should be the request object passed but it's also an instance class View: def get(self,request,*args,**kwargs): self.get_session

问题 I am having difficulty understanding one thing in Python.I have been coding in Python from a very long time but there's is something that just struck me today which i struggle to understand So the situation goes like this I have a mixin and a view class Mixin: def get_session(self,request,*args,**kwargs): print(self) #should be the instance passed print(request) #should be the request object passed but it's also an instance class View: def get(self,request,*args,**kwargs): self.get_session

问题 Is this the correct way to represent the following code in a UML Class Diagram? CODE: public class CustomerRepository : EntityFrameworkRepository<Customer>, ICustomerRepository { } UML: 回答1: EDIT: Realised first answer wasn't correct after posting. The UML spec says (section 7.3.4): A bound element has the same graphical notation as other Elements of that kind. A TemplateBinding is shown as a dashed arrow with the tail on the bound element and the arrowhead on the template and the keyword

问题 Is this the correct way to represent the following code in a UML Class Diagram? CODE: public class CustomerRepository : EntityFrameworkRepository<Customer>, ICustomerRepository { } UML: 回答1: EDIT: Realised first answer wasn't correct after posting. The UML spec says (section 7.3.4): A bound element has the same graphical notation as other Elements of that kind. A TemplateBinding is shown as a dashed arrow with the tail on the bound element and the arrowhead on the template and the keyword