Question

我试图在python中调用fortran dll，但是遇到OSerror：异常：访问冲突读取0x00000000。

.dll函数调用应具有以下属性： double FDIR(double *x,const double *a, int32_t *na, int32_t *k, double *h, double *x1,const int32_t *relparam, int32_t *m, int32_t *profile, int32_t *nlines, int32_t *nrefer, double *deltaX)。另外，我有一个成功调用.dll的labview脚本，所以我知道问题出在python脚本中。

以下是我到目前为止的代码

from ctypes import * 
import numpy as np
#Define Variables
x = np.arange(0, 5.52602+0.197358, 0.197358)
a = [2.65477,0.859621,0.0177231,0.0001,0,4.15638,0,0,
     2.75715,-0.00442,
     0,1,0, 
     0,1,0] 
na = len(a)
k = 0
h = 0
x1 = 0
relparams = [0,0,0,0,0,0,0,0]
m = 8
profile = 1
nlines = 1
nref = 0
deltax = 0
#Conversions
a = np.asarray(a)
relparams = np.asarray(relparams, dtype = np.int32)
#Call Dll
fit_dll = cdll.LoadLibrary("mydll.dll")
#Loop dll
for x_ in x:
    fit_dll.FDIR(c_double(x_), 
                    a.ctypes.data_as(POINTER(c_double)), 
                    c_int32(na), 
                    c_int32(k),
                    c_double(h), 
                    c_double(x1), 
                    relparams.ctypes.data_as(POINTER(c_int)),
                    c_int32(m),
                    c_int32(profile),
                    c_int32(nlines),
                    c_int32(nref),
                    c_double(deltax))
    print (result)

这里有什么东西可以作为一个明显的问题跳出来吗？非常感谢任何帮助/建议！

更新：感谢您的帮助，abarnert！我在argtypes和restype中添加了该函数。并在指针中添加了其余的变量。现在代替OSerror：exception：访问冲突读取0x00000000。我得到ValueError：调用过程没有足够的参数（缺少48个字节）或错误的调用约定。有什么想法吗？

from ctypes import * 
import numpy as np

#Define Variables
x = np.arange(0, 5.52602+0.197358, 0.197358)
a = [2.65477,0.859621,0.0177231,0.0001,0,4.15638,0.0001,0.0001,
    2.75715,-0.00442, # linear baseline
    0,1,0, # etalon 1
    0,1,0] # etalon 2
na = len(a)
k = 0
h = 0
x1 = 0#x0
relparams = [0,0,0,0,0,0,0,0]
m = 8
profile = 1
nlines = 1
nref = 0
deltax = 0
#Conversions

a = np.asarray(a)
relparams = np.asarray(relparams, dtype = np.int32)
#Call Dll

fit_dll = cdll.LoadLibrary("mydll.dll")
#Loop dll

#Setting argtypes

fit_dll.FDIR.argtypes = [POINTER(c_double), #1 - x
                        POINTER(c_double),#2 - a
                        POINTER(c_int),#3 - na 
                        POINTER(c_int),#4 - k
                        POINTER(c_double),#5 - h
                        POINTER(c_double), #6 - x1
                        POINTER(c_int), #7 - relparam
                        POINTER(c_int), #8 - m
                        POINTER(c_int), #9 - profile
                        POINTER(c_int),#10 - nlines
                        POINTER(c_int),#11 - nref
                        POINTER(c_double)] #12 - deltax

# Setting restype
fit_dll.FDIR.restype  = c_double
#  Define Types
LP_c_double = POINTER(c_double)
LP_c_int = POINTER(c_int)

#Loop dll
print (LP_c_double(c_double(deltax)))
x_ = 0
fit_dll.FDIR(LP_c_double(c_double(x_)), #1
                a.ctypes.data_as(POINTER(c_double)), #2
                LP_c_int(c_int(na)), #3
                LP_c_int(c_int(k)), #4
                LP_c_double(c_double(h)),#5 
                LP_c_double(c_double(x1)), #6
                relparams.ctypes.data_as(POINTER(c_int)), #7
                LP_c_int(c_int(m)), #8
                LP_c_int(c_int(profile)), #9 
                LP_c_int(c_int(nlines)), #10
                LP_c_int(c_int(nref)), #11
                LP_c_double(c_double(deltax))) #12

Fortran DLL的Python ctypes调用：OSError：exception：访问冲突读取0x00000000

0 个答案: