class Config:
    def __init__(self,system):
        self.config = configparser.ConfigParser()
        self.config.read("config.ini")
        self.connection_source=self.config.get(system,'Source')
        self.system=system

    def getsystemSources(self):
        return self.connection_source

    def getConnection(self,source):
        self.source=source
        self.connection_string=self.config.get('CONNECTION',self.system+'_'+source+'_'+'connectstring')   ## Connection
        self.connection_user=self.config.get('CONNECTION',self.system+'_'+source+'_'+'user')   ## Connection user
        self.connection_password=self.config.get('CONNECTION',self.system+'_'+source+'_'+'password')   ## Connection pass

class Connection(IngesConfig):
    def __init__ (self):
        self.connection_string=Config.connection_string
        self.connection_user=Config.connection_user
        self.connection_password=Config.connection_user
        self.connection_source=Config.connection_source
    def conn_function(self):
        print (self.connection_string)
        print (self.connection_user)
        print (self.connection_password)

emp1 = Config('Windows')
value=emp1.getsystemSources()
print (value)
emp2 = Connection()    -> how to run it ?