ManyQt 0.4.0

PyQt/PySide compatibility layer.

ManyQt is a lightweight abstraction layer that enables developers to write applications with a single API targeting PyQt and PySide. It supports multiple Qt versions and bindings—PyQt4, PyQt5, PySide, PySide2, PyQt6, and PySide6—under a Qt5-style layout, where QtGui and QtWidgets are separated.

(Inspired from `QtPy <https://github.com/spyder-ide/qtpy>`_ and `AnyQt <https://github.com/ales-erjavec/anyqt>`_.)

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Purpose & Benefits:

ManyQt simplifies cross-version and cross-binding development:

• Write your code using standard Qt API patterns.

• Import from manyqt instead of PyQtX or PySideX.

• Seamlessly port between Qt4, Qt5, and Qt6.

• Resolve incompatibilities automatically.

• Incrementally migrate large codebases—module by module.

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Requirements:

To use ManyQt, you must have one of the following libraries installed:

• PyQt4

• PyQt5

• PyQt6

• PySide

• PySide2

• PySide6

If multiple packages are available, ``PyQt5`` is selected by default unless overridden by an environment variable.

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Selecting the Backend:

The active Qt binding can be set using the QT_API environment variable:

Value	Selects
pyqt4	PyQt4
pyqt5	PyQt5
pyqt6	PyQt6
pyside	PySide
pyside2	PySide2
pyside6	PySide6

Alternatively, you may also configure the API programmatically—as long as no other Qt libraries have been imported yet.

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Features at a Glance:

Unified Namespace:

Provides a consistent, Qt5-compatible module layout with some minor renaming for portability.

Environment & Code-Based Selection:

Specify your preferred binding via:

• QT_API environment variable.

• Python code (early in execution).

Safe Import Hook (Optional):

Includes an import guard that:

• Detects and blocks mixed Qt binding imports.

• Emulates Qt4-style imports via Qt5-compatible monkey patching.

Simple Usage:

from os import environ
environ["QT_API"] = "pyqt5"  # or "pyqt4", "pyside", "pyside2", "pyqt6", "pyside6", to force a specific backend.
from ManyQt.QtWidgets import *
from ManyQt.QtCore import *
from ManyQt.QtGui import *