Is there a nice way to switch between 2 different packages providing the same APIs?

Tim Williams tjandacw at
Thu Jul 5 12:08:30 EDT 2018

On Thu, Jul 5, 2018 at 9:02 AM Mark Summerfield via Python-list <
python-list at> wrote:

> For GUI programming I often use Python bindings for Qt.
> There are two competing bindings, PySide and PyQt.
> Ideally I like to have applications that can use either. This way, if I
> get a problem I can try with the other bindings: if I still get the
> problem, then it is probably me; but if I don't it may be an issue with the
> bindings.
> But working with both means that my imports are very messy. Here's a tiny
> example:
> if PYSIDE: # bool True -> Use PySide; False -> Use PyQt5
>     from PySide2.QtCore import Qt
>     from PySide2.QtGui import QIcon
>     from PySide2.QtWidgets import (
>         QDialog, QFrame, QGridLayout, QLabel, QLineEdit, QPushButton,
>         QVBoxLayout)
> else:
>     from PyQt5.QtCore import Qt
>     from PyQt5.QtGui import QIcon
>     from PyQt5.QtWidgets import (
>         QDialog, QFrame, QGridLayout, QLabel, QLineEdit, QPushButton,
>         QVBoxLayout)
> The PYSIDE constant is imported from another module and is used for all
> .py files in a given project so that just by changing PYSIDE's value I can
> run an entire application with PySide2 or with PyQt5.
> But I'd really rather just have one lot of imports per file.
> One obvious solution is to create a '' module that imports everything
> depending on the PYSIDE switch and that I then use in all the other .py
> files, something like this:
> from Qt.QtCore import Qt
> from Qt.QtGui import QIcon
> ... etc.
> But I'm just wondering if there's a nicer way to do all this?
> --

Check out pyqtgraph <>

It tries to use  PyQt5/PyQt4/PySide depending on which if these packages
were imported before importing pyqtgraph.

More information about the Python-list mailing list