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Description:

PythonQwt 0.12.7

PythonQwt: Qt plotting widgets for Python

ℹ️ Created in 2014 by Pierre Raybaut and maintained by the PlotPyStack organization.

The PythonQwt project was initiated to solve -at least temporarily- the
obsolescence issue of PyQwt (the Python-Qwt C++ bindings library) which is
no longer maintained. The idea was to translate the original Qwt C++ code to
Python and then to optimize some parts of the code by writing new modules
based on NumPy and other libraries.
The PythonQwt package consists of a single Python package named qwt and
of a few other files (examples, doc, ...).
See documentation online or PDF for more details on the library and changelog for recent history of changes.
Sample
import qwt
import numpy as np

app = qwt.qt.QtGui.QApplication([])

# Create plot widget
plot = qwt.QwtPlot("Trigonometric functions")
plot.insertLegend(qwt.QwtLegend(), qwt.QwtPlot.BottomLegend)

# Create two curves and attach them to plot
x = np.linspace(-10, 10, 500)
qwt.QwtPlotCurve.make(x, np.cos(x), "Cosinus", plot, linecolor="red", antialiased=True)
qwt.QwtPlotCurve.make(x, np.sin(x), "Sinus", plot, linecolor="blue", antialiased=True)

# Resize and show plot
plot.resize(600, 300)
plot.show()

app.exec_()

Examples (tests)
The GUI-based test launcher may be executed from Python:
from qwt import tests
tests.run()

or from the command line:
PythonQwt

Tests may also be executed in unattended mode:
PythonQwt-tests --mode unattended

Overview
The qwt package is a pure Python implementation of Qwt C++ library with
the following limitations.
The following Qwt classes won't be reimplemented in qwt because more
powerful features already exist in guiqwt: QwtPlotZoomer,
QwtCounter, QwtEventPattern, QwtPicker, QwtPlotPicker.
Only the following plot items are currently implemented in qwt (the only
plot items needed by guiqwt): QwtPlotItem (base class), QwtPlotItem,
QwtPlotMarker, QwtPlotSeriesItem and QwtPlotCurve.
See "Overview" section in documentation
for more details on API limitations when comparing to Qwt.
Roadmap
The qwt package short-term roadmap is the following:

Drop support for PyQt4 and PySide2
Drop support for Python < 3.8
Replace setup.py by pyproject.toml, using setuptools (e.g. see guidata)
Add more unit tests: the ultimate goal is to reach 90% code coverage

Dependencies
Requirements

Python >=3.8
PyQt5, PyQt6 or PySide6
QtPy >= 1.3
NumPy >= 1.5

Optional dependencies

coverage, pytest (for unit tests)
sphinx (for documentation generation)

Installation
From the source package:
python -m build

Copyrights
Main code base

Copyright © 2002 Uwe Rathmann, for the original Qwt C++ code
Copyright © 2015 Pierre Raybaut, for the Qwt C++ to Python translation and
optimization
Copyright © 2015 Pierre Raybaut, for the PythonQwt specific and exclusive
Python material

PyQt, PySide and Python2/Python3 compatibility modules

Copyright © 2009-2013 Pierre Raybaut
Copyright © 2013-2015 The Spyder Development Team

Some examples

Copyright © 2003-2009 Gerard Vermeulen, for the original PyQwt code
Copyright © 2015 Pierre Raybaut, for the PyQt5/PySide port and further
developments (e.g. ported to PythonQwt API)

License
The qwt Python package was partly (>95%) translated from Qwt C++ library:
the associated code is distributed under the terms of the LGPL license. The
rest of the code was either wrote from scratch or strongly inspired from MIT
licensed third-party software.
See included LICENSE file for more details about licensing terms.