Curve and image plotting tools for Python/Qt applications

Project description

PlotPy: Curve and image plotting tools for Python/Qt applications

ℹ️ Created in 2016 by Pierre Raybaut and maintained by the PlotPyStack organization.

ℹ️ PlotPy V2 is the new major release of guiqwt: same team 🏋️, same goal 🎯, same long-term support ⏳.

Overview

plotpy is is a Python library providing efficient 2D data-plotting features for interactive computing and signal/image processing application development. It is part of the PlotPyStack project, aiming at providing a unified framework for creating scientific GUIs with Python and Qt.

plotpy is based on:

Python language and Qt GUI toolkit
guidata automatic GUI generation library
PythonQwt plotting widgets library
NumPy and SciPy scientific computing libraries

See documentation for more details on the library.

Copyrights and licensing:

Copyright © 2023 CEA, Codra, Pierre Raybaut.
Licensed under the terms of the BSD 3-Clause (see LICENSE).

Features

The plotpy library also provides the following features.

General plotting features:

Ready-to-use plot widgets and dialog boxes
pyplot: interactive plotting widgets, equivalent to matplotlib.pyplot, at least for the implemented functions
Supported plot items: curves, images, contours, histograms, labels, shapes, annotations, ...

Interactive features (i.e. not only programmatic plotting but also with mouse/keyboard):

Multiple object selection for moving objects or editing their properties through automatically generated dialog boxes
Item list panel: move objects from foreground to background, show/hide objects, remove objects, ...
Customizable aspect ratio for images
Tons of ready-to-use tools: plot canvas export to image file, image snapshot, interval selection, image rectangular filter, etc.
Curve fitting tool with automatic fit, manual fit with sliders, ...
Contrast adjustment panel for images: select the LUT by moving a range selection object on the image levels histogram, eliminate outliers, ...
X-axis and Y-axis cross-sections: support for multiple images, average cross-section tool on a rectangular area, ...
Apply any affine transform to displayed images in real-time (rotation, magnification, translation, horizontal/vertical flip, ...)

Application development helpers:

Ready-to-use plot widgets and dialog boxes
Load/save graphical objects (curves, images, shapes) into HDF5, JSON or INI files
A lot of test scripts which demonstrate plotpy features (see examples)

Dependencies and installation

Supported Qt versions and bindings

The whole PlotPyStack set of libraries relies on the Qt GUI toolkit, thanks to QtPy, an abstraction layer which allows to use the same API to interact with different Python-to-Qt bindings (PyQt5, PyQt6, PySide2, PySide6).

Compatibility table:

PlotPy version	PyQt5	PyQt6	PySide2	PySide6
2.0-2.5	✅	⚠️	❌	⚠️
Latest	✅	✅	❌	✅

Other dependencies and installation

See Installation section in the documentation for more details.

Project details

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This version

2.8.3

Dec 18, 2025

2.8.2

Nov 12, 2025

2.8.1

Nov 6, 2025

2.8.0

Oct 24, 2025

2.7.5

Jul 15, 2025

2.7.4

Apr 26, 2025

2.7.3

Apr 5, 2025

2.7.2

Feb 14, 2025

2.7.1

Jan 22, 2025

2.7.0

Nov 7, 2024

2.6.3

Oct 1, 2024

2.6.2

Aug 6, 2024

2.6.1

Aug 2, 2024

2.6.0

Aug 2, 2024

2.5.1

Aug 1, 2024

2.5.0

Aug 1, 2024

2.4.2

Jul 16, 2024

2.4.1

Jul 9, 2024

2.4.0

Jun 26, 2024

2.3.5

Jun 21, 2024

2.3.4

Jun 20, 2024

2.3.3

Jun 13, 2024

2.3.2

May 7, 2024

2.3.1

May 6, 2024

2.3.0

Mar 11, 2024

2.2.0

Mar 4, 2024

2.1.2

Feb 16, 2024

2.1.1

Feb 9, 2024

2.1.0

Feb 8, 2024

2.0.3

Dec 22, 2023

2.0.2

Dec 15, 2023

2.0.1

Nov 29, 2023

2.0.0

Oct 25, 2023

1.2.0

Apr 13, 2021

1.0.5

Oct 29, 2019

0.1.0

Jul 3, 2016

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PlotPy 2.8.3

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PlotPy: Curve and image plotting tools for Python/Qt applications

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