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Boxiang Sun
cython
Commits
7ddb28ca
Commit
7ddb28ca
authored
Jun 23, 2018
by
gabrieldemarmiesse
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Moved an example from pure.rst to the examples directory.
parent
084a25f5
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docs/examples/tutorial/pure/mymodule.pxd
docs/examples/tutorial/pure/mymodule.pxd
+5
-0
docs/examples/tutorial/pure/mymodule.py
docs/examples/tutorial/pure/mymodule.py
+10
-0
docs/src/tutorial/pure.rst
docs/src/tutorial/pure.rst
+3
-17
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docs/examples/tutorial/pure/mymodule.pxd
0 → 100644
View file @
7ddb28ca
# mymodule.pxd
# declare a C function as "cpdef" to export it to the module
cdef
extern
from
"math.h"
:
cpdef
double
sin
(
double
x
)
docs/examples/tutorial/pure/mymodule.py
0 → 100644
View file @
7ddb28ca
# mymodule.py
import
cython
# override with Python import if not in compiled code
if
not
cython
.
compiled
:
from
math
import
sin
# calls sin() from math.h when compiled with Cython and math.sin() in Python
print
(
sin
(
0
))
docs/src/tutorial/pure.rst
View file @
7ddb28ca
...
@@ -299,25 +299,11 @@ Calling C functions
...
@@ -299,25 +299,11 @@ Calling C functions
Normally, it isn't possible to call C functions in pure Python mode as there
Normally, it isn't possible to call C functions in pure Python mode as there
is no general way to support it in normal (uncompiled) Python. However, in
is no general way to support it in normal (uncompiled) Python. However, in
cases where an equivalent Python function exists, this can be achieved by
cases where an equivalent Python function exists, this can be achieved by
combining C function coercion with a conditional import as follows:
:
combining C function coercion with a conditional import as follows:
# in mymodule.pxd:
.. literalinclude:: ../../examples/tutorial/pure/mymodule.pxd
# declare a C function as "cpdef" to export it to the module
.. literalinclude:: ../../examples/tutorial/pure/mymodule.py
cdef extern from "math.h":
cpdef double sin(double x)
# in mymodule.py:
import cython
# override with Python import if not in compiled code
if not cython.compiled:
from math import sin
# calls sin() from math.h when compiled with Cython and math.sin() in Python
print(sin(0))
Note that the "sin" function will show up in the module namespace of "mymodule"
Note that the "sin" function will show up in the module namespace of "mymodule"
here (i.e. there will be a ``mymodule.sin()`` function). You can mark it as an
here (i.e. there will be a ``mymodule.sin()`` function). You can mark it as an
...
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