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C# importing class as *


By : Ayub Hossen
Date : July 29 2020, 01:00 PM
Does that help You can use a static import feature of C# if you want to use many static helper functions. I've provided a basic example. You can use this for standard .NET framework classes such as System.Math, System.Console etc.
code :
namespace Utils 
{
    // using static
    using static Utils.Helper;

    public class Program
    {
        public static void Main()
        {
            // no need to type Helper.Pow(2, 2);
            var x = Pow(2, 2);

            Console.WriteLine(x);
        }
    }
}

namespace Utils
{
    public static class Helper
    {
        public static double Pow(int x, int pow) => Math.Pow(x, pow);
    }
}


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In python, what are the pros and cons of importing a class vs. importing the class's module?


By : Dunc
Date : March 29 2020, 07:55 AM
this will help In Python, there is no such thing as a variable that is global across more than one module. If you do from pkg.module import MyClass, then MyClass is in the global namespace of the module where you do that, but not of any other module (including modules that import the module that imports MyClass).
As for your more general question, either import mechanism can be acceptable depending on the situation. If the module name is long, you can get some shortening by importing it under a different name:
code :
# Awkward
from package import reallylongmodule
reallylongmodule.MyClass()

# Less awkward
from package import reallylongmodule as rlm
rlm.MyClass()

Class Not Found Exception When Importing a Class: Haxe (With OpenFL + Flixel libraries)


By : user2887123
Date : March 29 2020, 07:55 AM
around this issue As the Haxe docs states:

Android efficiency importing static methods or importing the class


By : user3212369
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Your question (according to me) does seems to address the same point. The question is if: is calling ClassName.staticMethod() directly
or this
code :
import static ClassName.staticMethod;
//rest of the stuff
staticMethod();

Importing a class in a class that imports the previous class (import-ception)


By : GaryB
Date : March 29 2020, 07:55 AM
With these it helps In Python, when you import a module (or part of it) for the first time, the code inside the module is executed like any other code. That is, if you had some prints laying around in global scope, they would be executed on import.
In your case, when you're running main.py, your first instruction is to import networking, which is fine so far. Then, you importing networking (and read/execute the module), and the first instruction of the networking file is to import the main module. That's where things start to go bad. The main module hasn't been imported yet, so it'll try to import it, and by doing so, execute it once again. The first instruction of the main module is to import Networking from the networking module. It doesn't need to import networking now since it's already been imported... Right? But when it tries to import the Networking class from that module, it fails - Networking doesn't exist because it has not been defined yet (remember, we still haven't read/executed anything past networking.py's first instruction (import).
code :
Executing first line of main.py, before import
Executing first line of networking.py, before import
Executing first line of main.py, before import
Traceback (most recent call last):
  File "main.py", line 2, in <module>
    from networking import Networking
  File "D:\Users\Matt\Desktop\networking.py", line 2, in <module>
    from main import Main
  File "D:\Users\Matt\Desktop\main.py", line 2, in <module>
    from networking import Networking
ImportError: cannot import name Networking
# No change here
from networking import Networking

class Main:
    Networking.get("Test")

    @staticmethod
    def receive(st):
        print("Received : "+st)
        Networking.push(st + "123")
# Define a Main class with an empty `receive` method
class Main: 
    @staticmethod
    def receive(st):
        pass

# Define your Networking class normally
class Networking: 
    @staticmethod
    def get(st):
        print("Requesting parameter (" + st + ") from smartphone")
        Main.receive(st)

    @staticmethod
    def push(st):
        print("Sending  (" + st + ")  to smartphone")

# Import your main module after `Networking` has been defined
from main import Main 
Requesting parameter (Test) from smartphone
Requesting parameter (Test) from smartphone
Received : Test
Sending  (Test123)  to smartphone

Any difference between importing whole file and importing only class with show in Dart?


By : user3175288
Date : March 29 2020, 07:55 AM
this one helps. There is no impact on performance. The reason of using show is to reduce chances of confusion when importing classes from different packages.
For instance: Let's say
code :
class One {}

class Two {}
class One {}

class Three {}
import 'abc.dart';
import 'xyz.dart';
import `xyz.dart` show Three // which means only `Three` class can be used in your current file from xyz.dart package
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