• Writing & Software

Qtrac Ltd. (incorporating Qtraining.eu) provides training, consultancy, and documentation services, specializing in the programming languages Python 2, Python 3, and C++, and in the Qt application development framework—both PyQt4 and C++/Qt4. All services are provided by Mark Summerfield (mark@qtrac.eu).

Free download— Moving from Python 2 to Python 3 (4 pages, 676K, PDF)—a very concise summary of Python 2 ↔ 3.1 differences plus the most commonly used new Python 3.1 features aimed at existing Python 2 programmers who want to start writing programs in idiomatic Python 3.1 style.

Our Books

• Advanced Qt Programming—due to be published Spring 2010 (Safari Rough Cut available now)
• Programming in Python 3: A Complete Introduction to the Python Language (Second Edition)
• Programming in Python 3: A Complete Introduction to the Python Language (First Edition)
• Rapid GUI Programming with Python and Qt: The Definitive Guide to PyQt Programming
• C++ GUI Programming with Qt 4 (Second Edition)—available free online in HTML
• C++ GUI Programming with Qt 4 (First Edition)—available as a free download in PDF
• C++ GUI Programming with Qt 3—available as a free download in PDF

Our Open Source Software

• Alt_Key—a GUI application and a library for calculating keyboard accelerators for menu option texts and dialog labels with versions available in PyQt4 and C++/Qt4. The Alt_Key modules (available in C++/Qt4, Python 2, and Java/SWT) can be used independently in other applications to dynamically create accelerators at runtime
• DiffPDF—a GUI application for comparing PDF files page by page, both textually and by their appearance. Available prebuilt as Debian and Fedora package diffpdf

Our Services—contact us for details

• Mentoring, code reviews, and consultancy in all the technologies where we have expertise, e.g., programming in C++, Python 2, and Python 3; regular expressions; and GUI programming using C++/Qt4 and PyQt4
• Training in programming C++, Python 2, and Python 3; in regular expressions; in GUI programming with C++/Qt4 and PyQt4; and using the Squish testing tool. All training courses vary in length, typically from 1 to 5 days depending on what you want to learn, and apart from Squish, they are all based on our books