fopen.restype = ctypes.POINTER(Wlz.FILE)
f = 'test.wlz'
print('Read test object from the file ' + f);
fp = fopen(f, 'rb')
obj = Wlz.WlzAssignObject(Wlz.WlzReadObj(fp, ctypes.byref(errNum)), None)
fclose(fp)
if(bool(errNum)):
print('Failed to read object from ' + f + \
' (' + Wlz.WlzStringFromErrorNum(errNum, None) + ').')
exit(1)
if((not bool(obj.contents)) or
((obj.contents.type != Wlz.WlzObjectType(Wlz.WLZ_3D_DOMAINOBJ).value) and
(obj.contents.type != Wlz.WlzObjectType(Wlz.WLZ_2D_DOMAINOBJ).value))):
print('Either 2 or 3D domain object with values required.')
exit(1)
print('Computing histogram')
hobj = Wlz.WlzAssignObject( \
Wlz.WlzHistogramObj(obj, \
ctypes.c_int(0), ctypes.c_double(0.0), ctypes.c_double(1.0), \
ctypes.byref(errNum)), None)
if(bool(errNum)):
print('Failed to compute histogram ' + \
'(' + Wlz.WlzStringFromErrorNum(errNum, None) + ').')
exit(1)
print('Plotting histogram')
