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Gwenaël Samain
cython
Commits
ea65eed8
Commit
ea65eed8
authored
Jun 26, 2018
by
gabrieldemarmiesse
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Moved an example from memoryviews.rst to the examples directory.
parent
084a25f5
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14 additions
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8 deletions
+14
-8
docs/examples/userguide/memoryviews/not_none.pyx
docs/examples/userguide/memoryviews/not_none.pyx
+11
-0
docs/src/userguide/memoryviews.rst
docs/src/userguide/memoryviews.rst
+3
-8
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docs/examples/userguide/memoryviews/not_none.pyx
0 → 100644
View file @
ea65eed8
import
numpy
as
np
def
process_buffer
(
int
[:,:]
input_view
not
None
,
int
[:,:]
output_view
=
None
):
if
output_view
is
None
:
# Creating a default view, e.g.
output_view
=
np
.
empty_like
(
input_view
)
# process 'input_view' into 'output_view'
return
output_view
docs/src/userguide/memoryviews.rst
View file @
ea65eed8
...
@@ -71,14 +71,9 @@ This also works conveniently as function arguments:
...
@@ -71,14 +71,9 @@ This also works conveniently as function arguments:
The ``not None`` declaration for the argument automatically rejects
The ``not None`` declaration for the argument automatically rejects
None values as input, which would otherwise be allowed. The reason why
None values as input, which would otherwise be allowed. The reason why
None is allowed by default is that it is conveniently used for return
None is allowed by default is that it is conveniently used for return
arguments::
arguments:
def process_buffer(int[:,:] input not None,
.. literalinclude:: ../../examples/userguide/memoryviews/not_none.pyx
int[:,:] output = None):
if output is None:
output = ... # e.g. numpy.empty_like(input)
# process 'input' into 'output'
return output
Cython will reject incompatible buffers automatically, e.g. passing a
Cython will reject incompatible buffers automatically, e.g. passing a
three dimensional buffer into a function that requires a two
three dimensional buffer into a function that requires a two
...
...
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