(original) (raw)

Dear,

I just wrote a sample like this:

testPy/

\_\_init\_\_.py

client.py

SoamFactory.c

SoamFactory.so

soamapi.py

sample/testP.py

export PYTHONPATH=$(TEST\_LOCATION):$(TEST\_LOCATION)/testPy

Here's the source codes:

\_\_init\_\_.py:

import client

client.py

import soamapi

class Client(soamapi.SessionCallback):

def \_\_init\_\_(self):

print "----class Client----"

super(Client, self).\_\_init\_\_()

soamapi.initialize()

def create\_session(self):

sec\_cb = soamapi.DefaultSecurityCallback()

self.connection = soamapi.connect(sec\_cb)

soamapi.py

import SoamFactory

class ConnectionSecurityCallback(object):

def \_\_init\_\_(self):

print "----class ConnectionSecurityCallback----"

def \_\_del\_\_(self):

pass

def test\_P(self):

print "test\_P in class ConnectionSecurityCallback"

class DefaultSecurityCallback(ConnectionSecurityCallback):

def \_\_init\_\_(self):

super(DefaultSecurityCallback, self).\_\_init\_\_()

print "----class DefaultSecurityCallback----"

def \_\_del\_\_(self):

super(DefaultSecurityCallback, self).\_\_del\_\_()

def test(self):

print "test in class DefaultSecurityCallback"

class SessionCallback(object):

def \_\_init\_\_(self):

pass

def \_\_del\_\_(self):

pass

def connect(security\_callback):

return SoamFactory.SoamFactory\_connect(security\_callback)

def initialize():

SoamFactory.SoamFactory\_initialize()

print "call soamapi"

SoamFactory.c

#include "Python.h"

#include "PythonLoop.c"

PyObject\* SOAM\_API\_MODULE = NULL;

PyObject\* pyModule = NULL;

static PyObject\* SoamFactory\_initialize(PyObject\* self, PyObject\* args){

PyEval\_InitThreads();

init();

Py\_RETURN\_NONE;

}

static PyObject\* SoamFactory\_connect(PyObject\* self, PyObject\* args){

PyObject\* pySecCallback = NULL;

int ok = PyArg\_ParseTuple(args, "O", &pySecCallback);

if (!ok){

printf("parse tuple error!\\n");

Py\_RETURN\_NONE;

}

if (! PyObject\_IsInstance(pySecCallback, connectSecCallback)){

printf("pySecCallback is not an instance of ConnectionSecurityCallback!\\n");

Py\_RETURN\_NONE;

}

printf("Successful!\\n");

Py\_RETURN\_NONE;

}

static PyMethodDef SoamFactory\[\] = {

{"SoamFactory\_connect", SoamFactory\_connect, METH\_VARARGS, "connection function"},

{"SoamFactory\_initialize", SoamFactory\_initialize, METH\_VARARGS, "SoamFactory\_initialize"},

{NULL, NULL}

};

void initSoamFactory(){

PyEval\_InitThreads();

Py\_Initialize();

pyModule = Py\_InitModule("SoamFactory", SoamFactory);

SOAM\_API\_MODULE = PyImport\_ImportModule("soamapi");

}

sample/testP.py

import testPy

print "========================================"

submitter = testPy.client.Client()

submitter.create\_session()

print "========================================"

When I ran it on python2.4, it worked well, and the result was

call soamapi

after import soamapi------client.py

========================================

----class Client----

----class ConnectionSecurityCallback----

----class DefaultSecurityCallback----

Successful!

========================================

But when I ran it on python2.7, it worked beyond my expectation, the result was

call soamapi

call soamapi

========================================

----class Client----

----class ConnectionSecurityCallback----

----class DefaultSecurityCallback----

pySecCallback is not an instance of ConnectionSecurityCallback!

========================================

I found that soamapi was imported twice, and I investigated this is related to absolute&relative import way. PyImport\_ImportModule in python2.7 uses absolute import way, it will look up sys.path to get soamapi module, and when testP.py file import testPy module, it will find local module soamapi under testPy package, and binds module's name to package, as testPy.soamapi.

There are two ways to correct it for python2.7, 1) Don't use import testPy, use import client directly to avoid using relative; 2) Use from \_\_future\_\_ import absolute\_import to enable absolute import feature.

But there are two Pre-conditions:

1) Should not modify testP.py;

2) Should be ran on both python2.4 and 2.7.

I don't know how to fix it. Is there any official way about how to porting this scenario or better idea?

Thanks,

Vatel

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
Python-Dev mailing list
Python-Dev@python.org
https://mail.python.org/mailman/listinfo/python-dev
Unsubscribe: https://mail.python.org/mailman/options/python-dev/brett%40python.org