How can i store pickle dumps data ?

[Abandoned]

Hi..
I have some dictionary as {2:3, 4:6, 5:7.........}
I want to pickle to these dictionary and save to database but i
couldn't..

My code for adding..
a=eval(dict)
a=pickle.dumps(a, -1)
cursor2.execute("INSERT INTO cache VALUES ('%s', %s)", (x[0],a))
conn2.commit()

i try in UTF-8 postresql database (data type BYTEA) and it gives me
this error:
> psycopg2.ProgrammingError: invalid byte sequence for encoding "UTF8":
> 0x80
> HINT:  This error can also happen if the byte sequence does not match
> the encoding expected by the server, which is controlled by
> "client_encoding".

i try in LATIN5 postgresql database (data type BYTEA) and it add first
10 element and than gives me this error:
cursor2.execute("INSERT INTO cache VALUES ('%s', %s)", (x[0],a))
psycopg2.ProgrammingError: invalid input syntax for type bytea

i try in LATIN5 (data type TEXT) and it add all element but when i
want to load it give me this error:
pickle.loads(SELECTED_DATA);
EOFError


Now how can i store the pickle data ?
Which encoding and which data type ?
Please help me i'm sorry my bad english.
King Regards..