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Backport PR #27178 on branch v3.8.x (Try/except import of Axes3D) #27202

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Merged
merged 1 commit into from
Oct 26, 2023
Merged

Backport PR #27178 on branch v3.8.x (Try/except import of Axes3D) #27202

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16 changes: 14 additions & 2 deletions lib/matplotlib/projections/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -55,7 +55,15 @@
from .. import axes, _docstring
from .geo import AitoffAxes, HammerAxes, LambertAxes, MollweideAxes
from .polar import PolarAxes
from mpl_toolkits.mplot3d import Axes3D

try:
from mpl_toolkits.mplot3d import Axes3D
except ImportError:
import warnings
warnings.warn("Unable to import Axes3D. This may be due to multiple versions of "
"Matplotlib being installed (e.g. as a system package and as a pip "
"package). As a result, the 3D projection is not available.")
Axes3D = None


class ProjectionRegistry:
Expand Down Expand Up @@ -87,8 +95,12 @@ def get_projection_names(self):
HammerAxes,
LambertAxes,
MollweideAxes,
Axes3D,
)
if Axes3D is not None:
projection_registry.register(Axes3D)
else:
# remove from namespace if not importable
del Axes3D


def register_projection(cls):
Expand Down