def add_pid(self, qname, sname, value, sym=True):
        """Add a percentage identity value to self.percentage_identity."""
        self.percentage_identity.loc[qname, sname] = value
        if sym:
            self.percentage_identity.loc[sname, qname] = value
def add_pid ( self , qname , sname , value , sym = True ) : self . percentage_identity . loc [ qname , sname ] = value if sym : self . percentage_identity . loc [ sname , qname ] = value
Add a percentage identity value to self.percentage_identity.