notes/Cython.txt at master · dHannasch/notes · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43

pass C++ class as parameter http://stackoverflow.com/questions/10436837/cython-and-c-class-constructors
#configparams.pxd
cdef extern from "configparams.h":
    cppclass ConfigParams:
        ConfigParams(int par1)
        int getPar1()

cdef class PyConfigParams:
    cdef ConfigParams* thisptr

# session.pyx
from configparams cimport PyConfigParams
from cython.operator cimport dereference as deref

cdef class PySession:
    cdef Session* thisptr
    def __cinit__(self, PyConfigParams pars):
        self.thisptr = new Session(deref(pars.thisptr))
    def doSomething(self):
        self.thisptr.doSomething()


Cython package hierarchy https://groups.google.com/forum/#!msg/cython-users/6trL0V1bLx4/7bxhj0xCK50J


cdef class samplerCaller:
  cdef np.float64_t v_pos[3]
results in bizarre error:
carray.from_py:77:51: 'float64_t' is not a type identifier

collect weird Cython error messages to present to THW
 see also causesError.pyx, I think I might have another version at home
 see also Cython.txt at home

http://www.thehackerwithin.org/berkeley/posts/cython-python-c-api/


a public declaration is only needed to make it accessible to external C code.