Decorators can add new functions or restrictions to the decorated objects without modifying the original source code. There are many kinds of decorators, including function decorators and class decorators. The name of decorator is different in many programming languages. It embodies the decoration pattern in the design pattern and emphasizes the open and closed principle.
What Is Decorator In Python With Example Read More »
There are two methods to implement thread programming in python. 1. Use _thread module. 2. Use the threading module’s Thread and Lock class. This article will show you examples of how to use them to implement thread programming in python.
How To Use Python Thread Example Read More »
Python provides a lot of built-in exception classes. All the built-in classes are sub-class of builtins.BaseException class. Besides the built-in exception class, you can also create customize exception classes. But all custom exception classes must extend builtins.Exception class. The builtins.Exception class is also a sub-class of builtins.BaseException class. This example will tell you how to
How To Use User Defined Exception In Python Read More »
This article will tell you how to install a python interpreter in the PyCharm project. Before start, you should make sure you had installed python on your system.
How To Install Python Interpreter In PyCharm Read More »
When I use eclipse to open an existing PyDev project, I find an error message like Unresolved import: smtplib. This error means the python3 built-in library smtplib can not be found and imported in python source code now. This error is because the python interpreter is not configured correctly, now I will tell you how
How To Fix Unresolved Import Issues In Eclipse PyDev Project Read More »
UIKit.UIProgressView class is used to implement the iOS progress bar component. This article will tell you how to use it both in the Main.storyboard visually and swift source code programmatically. First, let us look at the example video below.
How To Use iOS Progress View Programmatically In Swift Read More »
This example will tell you how to use UIActivityIndicatorView class to implement iOS activity indicator both visually ( in the Main.storyboard file ) and programmatically in swift source code. First, let us look at the example demo video below.
How To Use iOS Activity Indicator Visually And Programmatically In Swift Read More »
When I develop the iOS app user interface, I add one button and one activity indicator in the main storyboard file. Because I want to write swift source code to manage the button and the activity indicator, so I press the Control key and Drag & Drop the button and the activity indicator from the
How To Rename IBOutlet Variable Or IBAction Function Without Lose Connection In Swift Read More »
We all know the iOS alert dialog is a modal dialog that will prompt at the iOS device screen center as usual, but it can also slide out from the iOS screen bottom. This example will show you how to slide out alert action sheet dialog from screen bottom in iOS app use swift.
How To Prompt iOS Alert Action Sheet In Swift Example Read More »
This example will show you how to create a swift button programmatically and how to set it’s text, text color, border width, border color, border corner radius and most important is how to add text margin / padding between the text and button border etc.
How To Add Text Margin or Padding In Swift UIButton Read More »
