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Don't force matplotlib backend names to be lowercase #14475

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Merged
Carreau merged 2 commits into from
Aug 30, 2024
Merged

Don't force matplotlib backend names to be lowercase #14475

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4d2c9e3
Don't force matplotlib backend names to be lowercase
ianthomas23 Jun 28, 2024
95b6275
Isolate tests so state doesn't leak to other tests
ianthomas23 Jun 28, 2024
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2 changes: 1 addition & 1 deletion IPython/core/magics/pylab.py
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Original file line number Diff line number Diff line change
Expand Up @@ -100,7 +100,7 @@ def matplotlib(self, line=''):
% _list_matplotlib_backends_and_gui_loops()
)
else:
gui, backend = self.shell.enable_matplotlib(args.gui.lower() if isinstance(args.gui, str) else args.gui)
gui, backend = self.shell.enable_matplotlib(args.gui)
self._show_matplotlib_backend(args.gui, backend)

@skip_doctest
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23 changes: 23 additions & 0 deletions IPython/core/tests/test_pylabtools.py
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Original file line number Diff line number Diff line change
Expand Up @@ -258,6 +258,29 @@ def test_qt_gtk(self):
assert gui == "qt"
assert s.pylab_gui_select == "qt"

@dec.skipif(not pt._matplotlib_manages_backends())
def test_backend_module_name_case_sensitive(self):
# Matplotlib backend names are case insensitive unless explicitly specified using
# "module://some_module.some_name" syntax which are case sensitive for mpl >= 3.9.1
all_lowercase = "module://matplotlib_inline.backend_inline"
some_uppercase = "module://matplotlib_inline.Backend_inline"
mpl3_9_1 = matplotlib.__version_info__ >= (3, 9, 1)

s = self.Shell()
s.enable_matplotlib(all_lowercase)
if mpl3_9_1:
with pytest.raises(RuntimeError):
s.enable_matplotlib(some_uppercase)
else:
s.enable_matplotlib(some_uppercase)

s.run_line_magic("matplotlib", all_lowercase)
if mpl3_9_1:
with pytest.raises(RuntimeError):
s.run_line_magic("matplotlib", some_uppercase)
else:
s.run_line_magic("matplotlib", some_uppercase)


def test_no_gui_backends():
for k in ['agg', 'svg', 'pdf', 'ps']:
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