ImportError: No Qt binding were found.

[lihuaiguang]

Hi, I have the following error:

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NodeGraphQt % python3 example_auto_nodes.py

Traceback (most recent call last): File "example_auto_nodes.py", line 3, in from NodeGraphQt import NodeGraph, setup_context_menu,
File "/Users/atx/Documents/Python/2021-NodeGraphQt/NodeGraphQt/init.py", line 76, in from .base.graph import NodeGraph, SubGraph File "/Users/atx/Documents/Python/2021-NodeGraphQt/NodeGraphQt/base/graph.py", line 9, in from Qt import QtCore, QtWidgets, QtGui File "/Users/atx/Documents/Python/2021-NodeGraphQt/docs/testenv/lib/python3.6/site-packages/Qt.py-1.3.6-py3.6.egg/Qt.py", line 1928, in _install() File "/Users/atx/Documents/Python/2021-NodeGraphQt/docs/testenv/lib/python3.6/site-packages/Qt.py-1.3.6-py3.6.egg/Qt.py", line 1876, in _install raise ImportError("No Qt binding were found.") ImportError: No Qt binding were found.

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MacOS 11.5.2, Python 3.6

[mara004]

Qt.py, the abstraction layer for PySide2/PyQt5 used by NodeGraphQt, requires at least one of these two Qt bindings to be installed. Simply install the one of your preference with the Python package manager pip3. I would generally recommend PySide since it is officially supported by The Qt Company and the licensing model is more liberal than the one of PyQt.

[lihuaiguang]

Thanks, @mara004, for the suggestion! After try to install the pyside2, I find a new error msg while running:

% python3 example.py
Error in importing class: cannot import name 'QtCore' from 'NodeGraphQt' (/Users/atx/Documents/Python/2021-NodeGraphQt/NodeGraphQt/init.py)

Anything wrong?

[mara004]

I can reproduce the error message. However, the GUI still shows up correctly for me. There is one spot in example_auto_nodes/input_nodes.py where QtCore is wrongly imported from NodeGraphQt, but changing it did not fix the error messages. The related code apparently is getNodesRecursively() in example_nodes.__init__. Unfortuantely it's a bit hard to tell where the root cause of these errors is without having deeper insights into the code.

[matsbohlinsson]

I can reproduce the error message. However, the GUI still shows up correctly for me. There is one spot in example_auto_nodes/input_nodes.py where QtCore is wrongly imported from NodeGraphQt, but changing it did not fix the error messages. The related code apparently is getNodesRecursively() in NodeGraphQt.__init__. Unfortuantely it's a bit hard to tell where the root cause of these errors is without having deeper insights into the code.

Same problem.

[mara004]

Yeah, and a similar issue exists for the math nodes example (which seems a little bit broken in general...)

[ClaireLush]

I have the same issue and cannot install into Python as part of QGIS. It already has PyQt5 but it doesn't work.