problem in python script for phone call from skype account

I'm trying to do a phone call by python script from skype account. It runs properly sometime while sometime give segmentation error while sometime it runs without error but no output. I had used following script for this as,

import Skype4Py
import sys
skype = Skype4Py.Skype()
skype.Attach()
m_PhoneNumber = "919763667993"
m_Call = skype.PlaceCall(m_PhoneNu开发者_Python百科mber)

Please give me solution for this, i think it maybe Skype4Py.api.posix_dbus.SkypeAPI Thread Problem , but not getting solution for this.