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Commit 7dd5281

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tacaswelltacaswell
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DOC: put section headings in 3.10 whats new (#29442)
* DOC: put section headings in 3.10 whats new
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‎doc/users/prev_whats_new/whats_new_3.10.0.rst

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=============================================
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What's new in Matplotlib 3.10.0 (Dec 14, 2024)
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=============================================
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For a list of all of the issues and pull requests since the last revision, see the
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:ref:`github-stats`.
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.. contents:: Table of Contents
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:depth: 4
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.. toctree::
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:maxdepth: 4
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Accessible Colors
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=================
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New more-accessible color cycle
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-------------------------------
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@@ -43,6 +60,12 @@ colour maps version 8.0.1 (DOI: https://doi.org/10.5281/zenodo.1243862).
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ax[1].imshow(img, cmap=plt.cm.managua)
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ax[2].imshow(img, cmap=plt.cm.vanimo)
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Plotting and Annotation improvements
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====================================
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Specifying a single color in ``contour`` and ``contourf``
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---------------------------------------------------------
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@@ -65,66 +88,6 @@ may be passed.
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plt.show()
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Exception handling control
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--------------------------
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The exception raised when an invalid keyword parameter is passed now includes
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that parameter name as the exception's ``name`` property. This provides more
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control for exception handling:
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.. code-block:: python
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import matplotlib.pyplot as plt
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def wobbly_plot(args, **kwargs):
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w = kwargs.pop('wobble_factor', None)
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try:
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plt.plot(args, **kwargs)
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except AttributeError as e:
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raise AttributeError(f'wobbly_plot does not take parameter {e.name}') from e
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wobbly_plot([0, 1], wibble_factor=5)
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.. code-block::
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AttributeError: wobbly_plot does not take parameter wibble_factor
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Preliminary support for free-threaded CPython 3.13
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--------------------------------------------------
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Matplotlib 3.10 has preliminary support for the free-threaded build of CPython 3.13. See
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https://py-free-threading.github.io, `PEP 703 <https://peps.python.org/pep-0703/>`_ and
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the `CPython 3.13 release notes
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<https://docs.python.org/3.13/whatsnew/3.13.html#free-threaded-cpython>`_ for more detail
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about free-threaded Python.
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Support for free-threaded Python does not mean that Matplotlib is wholly thread safe. We
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expect that use of a Figure within a single thread will work, and though input data is
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usually copied, modification of data objects used for a plot from another thread may
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cause inconsistencies in cases where it is not. Use of any global state (such as the
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``pyplot`` module) is highly discouraged and unlikely to work consistently. Also note
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that most GUI toolkits expect to run on the main thread, so interactive usage may be
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limited or unsupported from other threads.
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If you are interested in free-threaded Python, for example because you have a
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multiprocessing-based workflow that you are interested in running with Python threads, we
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encourage testing and experimentation. If you run into problems that you suspect are
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because of Matplotlib, please open an issue, checking first if the bug also occurs in the
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“regular” non-free-threaded CPython 3.13 build.
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Increased Figure limits with Agg renderer
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-----------------------------------------
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Figures using the Agg renderer are now limited to 2**23 pixels in each
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direction, instead of 2**16. Additionally, bugs that caused artists to not
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render past 2**15 pixels horizontally have been fixed.
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Note that if you are using a GUI backend, it may have its own smaller limits
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(which may themselves depend on screen size.)
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Vectorized ``hist`` style parameters
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------------------------------------
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ax.set_yticks([])
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plt.show()
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``svg.id`` rcParam
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------------------
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:rc:`svg.id` lets you insert an ``id`` attribute into the top-level ``<svg>`` tag.
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e.g. ``rcParams["svg.id"] = "svg1"`` results in
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default), no ``id`` tag is included
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.. code-block:: XML
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<svg
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xmlns:xlink="http://www.w3.org/1999/xlink"
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width="50pt" height="50pt"
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viewBox="0 0 50 50"
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xmlns="http://www.w3.org/2000/svg"
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version="1.1"
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id="svg1"
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></svg>
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This is useful if you would like to link the entire matplotlib SVG file within
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another SVG file with the ``<use>`` tag.
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.. code-block:: XML
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<svg>
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<use
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width="50" height="50"
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xlink:href="mpl.svg#svg1" id="use1"
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x="0" y="0"
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/></svg>
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Where the ``#svg1`` indicator will now refer to the top level ``<svg>`` tag, and
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will hence result in the inclusion of the entire file.
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``boxplot`` and ``bxp`` orientation parameter
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---------------------------------------------
@@ -361,6 +291,11 @@ the ``set_data`` method, enabling e.g. resampling
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coll.set_data(t, -t**4, t**4)
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fig.savefig("after.png")
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3D plotting improvements
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========================
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Fill between 3D lines
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---------------------
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ax.legend(['axlim_clip=False (default)', 'axlim_clip=True'])
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Preliminary support for free-threaded CPython 3.13
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==================================================
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Matplotlib 3.10 has preliminary support for the free-threaded build of CPython 3.13. See
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https://py-free-threading.github.io, `PEP 703 <https://peps.python.org/pep-0703/>`_ and
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the `CPython 3.13 release notes
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<https://docs.python.org/3.13/whatsnew/3.13.html#free-threaded-cpython>`_ for more detail
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about free-threaded Python.
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Support for free-threaded Python does not mean that Matplotlib is wholly thread safe. We
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expect that use of a Figure within a single thread will work, and though input data is
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usually copied, modification of data objects used for a plot from another thread may
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cause inconsistencies in cases where it is not. Use of any global state (such as the
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``pyplot`` module) is highly discouraged and unlikely to work consistently. Also note
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that most GUI toolkits expect to run on the main thread, so interactive usage may be
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limited or unsupported from other threads.
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426+
If you are interested in free-threaded Python, for example because you have a
427+
multiprocessing-based workflow that you are interested in running with Python threads, we
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encourage testing and experimentation. If you run into problems that you suspect are
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because of Matplotlib, please open an issue, checking first if the bug also occurs in the
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“regular” non-free-threaded CPython 3.13 build.
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Other Improvements
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==================
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``svg.id`` rcParam
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------------------
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:rc:`svg.id` lets you insert an ``id`` attribute into the top-level ``<svg>`` tag.
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e.g. ``rcParams["svg.id"] = "svg1"`` results in
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.. code-block:: XML
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<svg
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xmlns:xlink="http://www.w3.org/1999/xlink"
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width="50pt" height="50pt"
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viewBox="0 0 50 50"
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xmlns="http://www.w3.org/2000/svg"
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version="1.1"
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id="svg1"
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></svg>
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This is useful if you would like to link the entire matplotlib SVG file within
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another SVG file with the ``<use>`` tag.
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.. code-block:: XML
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<svg>
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<use
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width="50" height="50"
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xlink:href="mpl.svg#svg1" id="use1"
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x="0" y="0"
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/></svg>
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Where the ``#svg1`` indicator will now refer to the top level ``<svg>`` tag, and
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will hence result in the inclusion of the entire file.
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By default, no ``id`` tag is included.
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Exception handling control
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--------------------------
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475+
The exception raised when an invalid keyword parameter is passed now includes
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that parameter name as the exception's ``name`` property. This provides more
477+
control for exception handling:
478+
479+
480+
.. code-block:: python
481+
482+
import matplotlib.pyplot as plt
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484+
def wobbly_plot(args, **kwargs):
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w = kwargs.pop('wobble_factor', None)
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try:
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plt.plot(args, **kwargs)
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except AttributeError as e:
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raise AttributeError(f'wobbly_plot does not take parameter {e.name}') from e
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wobbly_plot([0, 1], wibble_factor=5)
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.. code-block::
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AttributeError: wobbly_plot does not take parameter wibble_factor
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Increased Figure limits with Agg renderer
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-----------------------------------------
501+
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Figures using the Agg renderer are now limited to 2**23 pixels in each
503+
direction, instead of 2**16. Additionally, bugs that caused artists to not
504+
render past 2**15 pixels horizontally have been fixed.
505+
506+
Note that if you are using a GUI backend, it may have its own smaller limits
507+
(which may themselves depend on screen size.)
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Miscellaneous Changes
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---------------------
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