@@ -79,14 +79,18 @@ def limit_range_for_scale(self, vmin, vmax, minpos):
7979return vmin ,vmax
8080
8181
82- class TransformScaleBase (Transform ):
83- """Base transform for scales to allow a deep copy"""
82+ class CopyableTransformMixin ():
83+ """
84+ Mixin to support copy and deep copy on transforms. This alows scales,
85+ and hence norms, to be copyable.
86+ """
8487def __deepcopy__ (self ,memo ):
8588return self .frozen ()
8689
90+ __copy__ = __deepcopy__
91+
8792
88- class LinearTransform (TransformScaleBase ,IdentityTransform ):
89- """Mixed class for Identity"""
93+ class LinearTransform (CopyableTransformMixin ,IdentityTransform ):
9094pass
9195
9296
@@ -124,9 +128,9 @@ def get_transform(self):
124128return LinearTransform ()
125129
126130
127- class FuncTransform (TransformScaleBase ):
131+ class FuncTransform (CopyableTransformMixin , Transform ):
128132"""
129- Asimple transform that takes and arbitrary function for the
133+ A transform that takes and arbitrary function for the
130134 forward and inverse transform.
131135 """
132136
@@ -202,7 +206,7 @@ def set_default_locators_and_formatters(self, axis):
202206axis .set_minor_locator (NullLocator ())
203207
204208
205- class LogTransform (TransformScaleBase ):
209+ class LogTransform (CopyableTransformMixin , Transform ):
206210input_dims = output_dims = 1
207211
208212@_api .rename_parameter ("3.3" ,"nonpos" ,"nonpositive" )
@@ -244,7 +248,7 @@ def inverted(self):
244248return InvertedLogTransform (self .base )
245249
246250
247- class InvertedLogTransform (TransformScaleBase ):
251+ class InvertedLogTransform (CopyableTransformMixin , Transform ):
248252input_dims = output_dims = 1
249253
250254def __init__ (self ,base ):
@@ -370,7 +374,7 @@ def get_transform(self):
370374return self ._transform
371375
372376
373- class SymmetricalLogTransform (TransformScaleBase ):
377+ class SymmetricalLogTransform (CopyableTransformMixin , Transform ):
374378input_dims = output_dims = 1
375379
376380def __init__ (self ,base ,linthresh ,linscale ):
@@ -402,7 +406,7 @@ def inverted(self):
402406self .linscale )
403407
404408
405- class InvertedSymmetricalLogTransform (TransformScaleBase ):
409+ class InvertedSymmetricalLogTransform (CopyableTransformMixin , Transform ):
406410input_dims = output_dims = 1
407411
408412def __init__ (self ,base ,linthresh ,linscale ):
@@ -505,7 +509,7 @@ def get_transform(self):
505509return self ._transform
506510
507511
508- class LogitTransform (TransformScaleBase ):
512+ class LogitTransform (CopyableTransformMixin , Transform ):
509513input_dims = output_dims = 1
510514
511515@_api .rename_parameter ("3.3" ,"nonpos" ,"nonpositive" )
@@ -531,7 +535,7 @@ def __str__(self):
531535return "{}({!r})" .format (type (self ).__name__ ,self ._nonpositive )
532536
533537
534- class LogisticTransform (TransformScaleBase ):
538+ class LogisticTransform (CopyableTransformMixin , Transform ):
535539input_dims = output_dims = 1
536540
537541@_api .rename_parameter ("3.3" ,"nonpos" ,"nonpositive" )