testbed/matplotlib__matplotlib/lib/matplotlib/axes/__init__.py

from . import _base
from ._axes import *

# Backcompat.
from ._axes import Axes as Subplot


class _SubplotBaseMeta(type):
    def __instancecheck__(self, obj):
        return (isinstance(obj, _base._AxesBase)
                and obj.get_subplotspec() is not None)


class SubplotBase(metaclass=_SubplotBaseMeta):
    pass


def subplot_class_factory(cls): return cls