{PyErr

/usr/local/lib/python2.7/dist-packages/numpy/core/include/numpy/
__multiarray_api.h:1546:144: note: in definition of macro ‘import_array’
 #define import_array() {if (_import_array() < 0) 
 {PyErr_Print(); PyErr_SetString(PyExc_ImportError,
  "numpy.core.multiarray failed to import"); 
  return NUMPY_IMPORT_ARRAY_RETVAL; } }
                    

解决办法：
修改/home/ls/catkin_ws/src/cv_bridge/src/module.hpp（根据自己的路径），将最后一段（36～40）行改为

static void do_numpy_import( )
{
	import_array( );
}