安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- What is the purpose of the `self` parameter? Why is it needed?
For a language-agnostic consideration of the design decision, see What is the advantage of having this self pointer mandatory explicit? To close debugging questions where OP omitted a self parameter for a method and got a TypeError, use TypeError: method () takes 1 positional argument but 2 were given instead If OP omitted self in the body of the method and got a NameError, consider How can
- Why do I get TypeError: Missing 1 required positional argument: self?
The self keyword in Python is analogous to this keyword in C++ Java C# In Python 2 it is done implicitly by the compiler (yes Python does compilation internally)
- What is SELF JOIN and when would you use it? [duplicate]
A self join is simply when you join a table with itself There is no SELF JOIN keyword, you just write an ordinary join where both tables involved in the join are the same table One thing to notice is that when you are self joining it is necessary to use an alias for the table otherwise the table name would be ambiguous It is useful when you want to correlate pairs of rows from the same
- git - SSL certificate problem: self signed certificate in certificate . . .
The reason was an SSL certificate problem: 'self-signed certificate in certificate chain '" Protected question To answer this question, you need to have at least 10 reputation on this site (not counting the association bonus) The reputation requirement helps protect this question from spam and non-answer activity
- How can I generate a self-signed SSL certificate using OpenSSL?
A self-signed certificate does not chain back to a trusted anchor The best way to avoid this is: Create your own authority (i e , become a CA) Create a certificate signing request (CSR) for the server Sign the server's CSR with your CA key Install the server certificate on the server Install the CA certificate on the client
- How to avoid explicit self in Python? - Stack Overflow
The "self" is the conventional placeholder of the current object instance of a class Its used when you want to refer to the object's property or field or method inside a class as if you're referring to "itself"
- Чем отличаются static, self и parent в php?
11 self — класс в котором написано static — класс в котором выполнилось Например, если вызвать унаследованный метод в котором self static, то каждый вариант даст разный результат Late Static Binding
|
|
|