Article Outline
Python pyqt (gui) example 'connection'
Functions in program:
def createConnection():
connection
Python pyqt example: connection
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## Copyright (C) 2013 Riverbank Computing Limited.
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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## This file is part of the examples of PyQt.
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from PyQt5.QtWidgets import QMessageBox
from PyQt5.QtSql import QSqlDatabase, QSqlQuery
def createConnection():
db = QSqlDatabase.addDatabase('QSQLITE')
db.setDatabaseName(':memory:')
if not db.open():
QMessageBox.critical(None, "Cannot open database",
"Unable to establish a database connection.\n"
"This example needs SQLite support. Please read the Qt SQL "
"driver documentation for information how to build it.\n\n"
"Click Cancel to exit.",
QMessageBox.Cancel)
return False
query = QSqlQuery()
query.exec_("create table person(id int primary key, "
"firstname varchar(20), lastname varchar(20))")
query.exec_("insert into person values(101, 'Danny', 'Young')")
query.exec_("insert into person values(102, 'Christine', 'Holand')")
query.exec_("insert into person values(103, 'Lars', 'Gordon')")
query.exec_("insert into person values(104, 'Roberto', 'Robitaille')")
query.exec_("insert into person values(105, 'Maria', 'Papadopoulos')")
query.exec_("create table offices (id int primary key,"
"imagefile int,"
"location varchar(20),"
"country varchar(20),"
"description varchar(100))");
query.exec_("insert into offices "
"values(0, 0, 'Oslo', 'Norway',"
"'Oslo is home to more than 500 000 citizens and has a "
"lot to offer.It has been called \"The city with the big "
"heart\" and this is a nickname we are happy to live up to.')")
query.exec_("insert into offices "
"values(1, 1, 'Brisbane', 'Australia',"
"'Brisbane is the capital of Queensland, the Sunshine State, "
"where it is beautiful one day, perfect the next. "
"Brisbane is Australia''s 3rd largest city, being home "
"to almost 2 million people.')")
query.exec_("insert into offices "
"values(2, 2, 'Redwood City', 'US',"
"'You find Redwood City in the heart of the Bay Area "
"just north of Silicon Valley. The largest nearby city is "
"San Jose which is the third largest city in California "
"and the 10th largest in the US.')")
query.exec_("insert into offices "
"values(3, 3, 'Berlin', 'Germany',"
"'Berlin, the capital of Germany is dynamic, cosmopolitan "
"and creative, allowing for every kind of lifestyle. "
"East meets West in the metropolis at the heart of a "
"changing Europe.')")
query.exec_("insert into offices "
"values(4, 4, 'Munich', 'Germany',"
"'Several technology companies are represented in Munich, "
"and the city is often called the \"Bavarian Silicon Valley\". "
"The exciting city is also filled with culture, "
"art and music. ')")
query.exec_("insert into offices "
"values(5, 5, 'Beijing', 'China',"
"'Beijing as a capital city has more than 3000 years of "
"history. Today the city counts 12 million citizens, and "
"is the political, economic and cultural centre of China.')")
query.exec_("create table images (locationid int, file varchar(20))")
query.exec_("insert into images values(0, 'images/oslo.png')")
query.exec_("insert into images values(1, 'images/brisbane.png')")
query.exec_("insert into images values(2, 'images/redwood.png')")
query.exec_("insert into images values(3, 'images/berlin.png')")
query.exec_("insert into images values(4, 'images/munich.png')")
query.exec_("insert into images values(5, 'images/beijing.png')")
return True
Useful links
- Learn PyQt: https://pythonbasics.org/pyqt-hello-world/
- Install PyQt: https://pythonbasics.org/install-pyqt/