After upgrading Raspbian Wheezy's Python from pyenv to 2.7.9, smbus was no longer available

Thank you for your help.

When I installed smbus using https://pypi.python.org/pypi/smbus-cffi when Python 2.3.7 was installed by default, I was able to use smbus successfully, but after installing pyenv into Python 2.7.9, ImportError: No module named smbus.I get the same error when I install it again using the same procedure.

If you use this (https://github.com/Azelphur/pyPushBullet), you will be warned to upgrade Python, so I really want to put in 2.7.9 to prevent it from coming out.Could you lend me your wisdom?Thank you for your cooperation.