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FIX: don't check for interactive framework if none required #12207

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Merged
merged 1 commit into from
Sep 23, 2018
Merged

FIX: don't check for interactive framework if none required #12207

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17 changes: 9 additions & 8 deletions lib/matplotlib/pyplot.py
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Original file line number Diff line number Diff line change
Expand Up @@ -211,14 +211,15 @@ def switch_backend(newbackend):
newbackend, Backend.backend_version)

required_framework = Backend.required_interactive_framework
current_framework = \
matplotlib.backends._get_running_interactive_framework()
if (current_framework and required_framework
and current_framework != required_framework):
raise ImportError(
"Cannot load backend {!r} which requires the {!r} interactive "
"framework, as {!r} is currently running".format(
newbackend, required_framework, current_framework))
if required_framework is not None:
current_framework = \
matplotlib.backends._get_running_interactive_framework()
if (current_framework and required_framework
and current_framework != required_framework):
raise ImportError(
"Cannot load backend {!r} which requires the {!r} interactive "
"framework, as {!r} is currently running".format(
newbackend, required_framework, current_framework))

rcParams['backend'] = rcParamsDefault['backend'] = newbackend

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