python iterable and iterator

An object is called an iterable object if it has an __iter__ method. List, tuple, dict are all iterable objects[reference]: The __iter__ method returns an iterator object. An object is […]

How to run jupyter?

If you are learning machine learning on your computer. The first thing would be running the jupyter app to do some hands-on. Running this program is not similar to running […]

We’ve talked about simulating mouse click in C language. Today, we’ll learn how to simulate mouse click in jQuery. There seem quite a few methods to simulate a mouse click […]

I have a very simple test project based on QtWebEngine: ——webengineview.h——- #ifndef WEBENGINEVIEW_H #define WEBENGINEVIEW_H #include <QWebEngineView> class WebengineView : public QWebEngineView { Q_OBJECT public: WebengineView(QWidget *parent = 0); ~WebengineView(); […]

I have a project in which I need to convert a byte into an integer: <?php $a=md5(“hello”,true); echo $a[15]*1.0/255.0; The second parameter of md5 is set to true in order […]

In python, you have many ways to represent a 2-dimensional array. You can use list like:[[1,2],[3,4],[5,6]], you can use ndarray in numpy like:numpy.array([[1,2],[3,4],[5,6]]), you can also use dataframe in the […]

If you learn python based AI software such as tensorflow, you’ll inevitably meet the package Numpy and DataFrame,etc. So you must learn how to use Numpy and DataFrame before you […]

In Qt, there seem a lot of classes related to XML:QDomDocument, QXmlStreamReader,QXmlSimpleReader,etc. You can choose any one to parse an XML document.  QDomDocument is more powerful but keep all content […]