Avoid circular imports

skimage/measure/__init__.py

@@ -8,7 +8,7 @@ from ._moments import moments, moments_central, moments_normalized, moments_hu
 from .profile import profile_line
 from .fit import LineModel, CircleModel, EllipseModel, ransac
 from .block import block_reduce
-from ._ccomp import label
+from ._label import label
 
 
 __all__ = ['find_contours',

skimage/measure/_label.py

@@ -0,0 +1,6 @@
+from ._ccomp import label as _label
+
+def label(input, neighbors=8, background=None, return_num=False):
+    return _label(input, neighbors, background, return_num)
+
+label.__doc__ = _label.__doc__

skimage/measure/_regionprops.py

@@ -4,8 +4,7 @@ from math import sqrt, atan2, pi as PI
 import numpy as np
 from scipy import ndimage
 
-from ..morphology.convex_hull import convex_hull_image
-from ._ccomp import label
+from ._label import label
 from . import _moments
 
 
@@ -136,6 +135,7 @@ class _RegionProperties(object):
 
     @_cached_property
     def convex_image(self):
+        from ..morphology.convex_hull import convex_hull_image
         return convex_hull_image(self.image)
 
     @_cached_property

skimage/morphology/__init__.py

@@ -4,13 +4,17 @@ from .grey import (erosion, dilation, opening, closing, white_tophat,
                    black_tophat)
 from .selem import (square, rectangle, diamond, disk, cube, octahedron, ball,
                     octagon, star)
-from ._label import label
 from .watershed import watershed
 from ._skeletonize import skeletonize, medial_axis
 from .convex_hull import convex_hull_image, convex_hull_object
 from .greyreconstruct import reconstruction
 from .misc import remove_small_objects
 
+from ..measure._label import label
+from skimage._shared.utils import deprecated as _deprecated
+label = _deprecated('skimage.measure.label')(label)
+
+
 __all__ = ['binary_erosion',
            'binary_dilation',
            'binary_opening',

skimage/morphology/_label.py

@@ -1,6 +0,0 @@
-__all__ = ['label']
-
-from ..measure._ccomp import label as _label
-from skimage._shared.utils import deprecated
-
-label = deprecated('skimage.measure.label')(_label)

skimage/morphology/convex_hull.py

@@ -3,7 +3,7 @@ __all__ = ['convex_hull_image', 'convex_hull_object']
 import numpy as np
 from ._pnpoly import grid_points_inside_poly
 from ._convex_hull import possible_hull
-from ..measure._ccomp import label
+from ..measure._label import label
 from skimage.util import unique_rows