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Commit6cf8450

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Reuse the noninteractivity warning from Figure.show in _Backend.show.
Currently, the warning message "Matplotlib is currently using ..., whichis a non-GUI backend, so cannot show the figure" and the (minor)associated logic (of catching NonGuiException) is duplicated betweenFigure.show and _Backend.show. Make the latter use the former, todeduplicate it.
1 parentb5b9a63 commit6cf8450

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3 files changed

+9
-18
lines changed

3 files changed

+9
-18
lines changed

‎lib/matplotlib/backend_bases.py

Lines changed: 2 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -185,14 +185,8 @@ def show(cls, block=None):
185185
ifnotmanagers:
186186
return
187187
formanagerinmanagers:
188-
try:
189-
manager.show()
190-
exceptNonGuiException:
191-
warnings.warn(
192-
('matplotlib is currently using %s, which is a '+
193-
'non-GUI backend, so cannot show the figure.')
194-
%get_backend())
195-
return
188+
# Emits a warning if the backend is non-interactive.
189+
manager.canvas.figure.show()
196190
ifcls.mainloopisNone:
197191
return
198192
ifblockisNone:

‎lib/matplotlib/figure.py

Lines changed: 3 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -439,10 +439,9 @@ def show(self, warn=True):
439439
exceptNonGuiException:
440440
pass
441441
ifwarn:
442-
warnings.warn(
443-
('matplotlib is currently using %s, which is a '+
444-
'non-GUI backend, so cannot show the figure.')
445-
%get_backend())
442+
warnings.warn('Matplotlib is currently using %s, which is a '
443+
'non-GUI backend, so cannot show the figure.'
444+
%get_backend())
446445

447446
def_get_axes(self):
448447
returnself._axstack.as_list()

‎lib/matplotlib/tests/test_backend_bases.py

Lines changed: 4 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -69,13 +69,11 @@ def test_non_gui_warning():
6969
withpytest.warns(UserWarning)asrec:
7070
plt.show()
7171
assertlen(rec)==1
72-
assert'matplotlib is currently using pdf, ' \
73-
'which is a non-GUI backend' \
74-
instr(rec[0].message)
72+
assert ('Matplotlib is currently using pdf, which is a non-GUI backend'
73+
instr(rec[0].message))
7574

7675
withpytest.warns(UserWarning)asrec:
7776
plt.gcf().show()
7877
assertlen(rec)==1
79-
assert'matplotlib is currently using pdf, ' \
80-
'which is a non-GUI backend' \
81-
instr(rec[0].message)
78+
assert ('Matplotlib is currently using pdf, which is a non-GUI backend'
79+
instr(rec[0].message))

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