8000 Further improve backend tutorial. by anntzer · Pull Request #14995 · matplotlib/matplotlib · GitHub
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Further improve backend tutorial. #14995

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Aug 7, 2019
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Further improve backend tutorial. #14995

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20 changes: 10 additions & 10 deletions tutorials/introductory/usage.py
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Original file line number Diff line number Diff line change
Expand Up @@ -345,11 +345,10 @@ def my_plotter(ax, data1, data2, param_dict):
# :func:`matplotlib.use`::
#
# import matplotlib
# matplotlib.use('PS') # generate postscript output by default
# matplotlib.use('qt5agg')
#
# If you use the `~matplotlib.use` function, this should be done before
# importing :mod:`matplotlib.pyplot`. Calling `~matplotlib.use` after pyplot
# has been imported may fail to switch the backend and raise an ImportError.
# This should be done before any figure is created; otherwise Matplotlib may
# fail to switch the backend and raise an ImportError.
#
# Using `~matplotlib.use` will require changes in your code if users want to
# use a different backend. Therefore, you should avoid explicitly calling
Expand All @@ -359,12 +358,13 @@ def my_plotter(ax, data1, data2, param_dict):
# The builtin backends
# --------------------
#
# With a typical installation of matplotlib, such as from a
# binary installer or a linux distribution package, a good default
# backend will already be set, allowing both interactive work and
# plotting from scripts, with output to the screen and/or to
# a file, so at least initially you will not need to use any of the
# methods given above.
# By default, Matplotlib should automatically select a default backend which
# allows both interactive work and plotting from scripts, with output to the
# screen and/or to a file, so at least initially you will not need to worry
# about the backend. The most common exception is if your Python distribution
# comes without :mod:`tkinter` and you have no other GUI toolkit installed;
# this happens on certain Linux distributions, where you need to install a
# Linux package named ``python-tk`` (or similar).
#
# If, however, you want to write graphical user interfaces, or a web
# application server (:ref:`howto-webapp`), or need a better
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