question about cx_Oracle .thanks

[David Fraser]

coolmenu wrote:
> Hi 
>   i hava a db ORACLE 10G,a table valid_card
> (card_no,varchar2(10),now_balance number (12,2))
> 
>  its'some record in table ('7188','42055.66')
> 
>  i use cx_Oracle to select now_balance from table
>  
>   curobj.execute("select loan_amount from valid_card where
> card_no='7181930166881974'");
> [<NumberVar object at 0x013A6920>]
> 
>>>>tuple=curobj.fetchone()
>>>>tuple
> 
> (42505.660000000003)
> 
> why 42505.66---->42505.6600000000003???
> thanks

This is because of the conversion of the float to decimal. Float objects 
have limited accuracy. I don't think it's much to do with cx_Oracle

David