Based on one of the questions on the forum, I wrote an example on using QThread in PyQt5, as well as using the moveToThread method to move the class object of the inherited QObject to another thread.

In this example, a certain algorithm is executed, which returns the text through the signal, as well as the color of the text to the main GUI. This data is added to the QTextBrowser with a color setting.

The program will look as follows

This will be a small update to the lesson on using QTableWidget in PyQt5

In the previous lesson it was shown how to display some kind of information in QTableWidget. And this lesson will also show how to make some cells editable and non-editable, as well as how to respond to keystrokes inside a QTableWidget

The application will look like this

Скоро будет выпущена технология предоставляющая Qt для Python о чём рассказали в блоге Qt Company. Речь идёт о PySide2, которая явяется официальным аналогом PyQt .

Рассмотрим создание не сложного приложения показывающего простоту Qt для Python с использованием виджетов QWidgets. Все скрипты будут иметь схожую структуру:

1. Создаем QApplication
2. Затем добавляем все QWidgets и структуры которые мы хотим использовать, (например QLabel)
3. Показываем приложение и запускаем QApplication

And now we will go deeper into the work with Qt using PyQt5, taking advantage of modern Qt features. By such possibilities I mean QtQuick and QML. PyQt5 allows you to use Qt classes that can process QML code, and therefore you can write an interface to QML, and also send signals to the QML layer and invoke slots of objects inherited from QObject from the QML layer.

To get meet with such possibilities of PyQt5, we will write a program that implements the following tasks:

• The program interface should be written in QML
• A class inherited from QObject and written in python must be implemented, with which we will interact from QML
• An application using this class will need to add and subtract integers

Appearance of the application should look like this:

For initial acquaintance with QTableWidget in PyQt5 we will create a table with three columns and one row. When you hover over the table headings, a pop-up message will be displayed. The text in the headers will be aligned to the left edge of the first column, in the middle to the second and to the right of the third column. Also the size of the columns will be adjusted according to the content.

The table will look like this:

The Qt library has a QCompleter class, which allows you to offer autocompletion to the input word in the input fields. This class is also supported by the PyQt5 library.

In the minimum, the application of this class might look like this:

# Create an input field
lineEdit = QLineEdit(self)
strList = ['Python', 'PyQt5', 'Qt', 'Django', 'QML']    # Create a list of words
# We create QCompleter, in which we establish the list, and also the pointer to the parent
completer = QCompleter(strList, lineEdit)
lineEdit.setCompleter(completer)        # Set QCompleter in the input field

See Using QSettings in PyQt5. I propose to write a small application, which will be a single check box, the state of which we will save in the settings. Status checkbox will be saved by clicking on the checkbox. After closing the program and re-open this checkbox will be put to the state in which it was at the close of the program.