def find_python_module(self, name, mark):
        if not name:
            raise ConstructorError("while constructing a Python module", mark,
                    "expected non-empty name appended to the tag", mark)
        try:
            __import__(name)
        except __HOLE__, exc:
            raise ConstructorError("while constructing a Python module", mark,
                    "cannot find module %r (%s)" % (name.encode('utf-8'), exc), mark)
        return sys.modules[name]
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/yaml-3.10/yaml/constructor.py/Constructor.find_python_module