psycopg3 transactions

Hi all

In psycopg3 i read and understood the new transaction management
behaviour. With the use of context managers i have to do something like
this:

con = psycopg.connect()
with con.transaction():
with con.cursor() as cur:
cur.execute("INSERT INTO table VALUES (1, 2, 3);")

and this works as expected.
But if i don't need a transaction because i don't need to commit
anything i can do something like this:

with con.cursor() as cur:
cur.execute("SELECT * FROM table;")

BUT if a do a select without a transaction the next command that require
a transaction don't works until i do a specific commit

with con.transaction():
with con.cursor() as cur:
cur.execute("DELETE FROM table;")

the delete is effective only for the current connection, i mean other db
user continue to see the <table> without the delete command
modifications
Looks like the previous select statement (uncommited) block following
delete statement even if i use the with con.transaction() statement.
If a do a con.commit() everything works as expected.

That means i need to use a transaction even for a select statement.
I can't use autocommit connection in my application.

Is it correct or am i losing anything ???

--
Paolo De Stefani