psycopg2 features

[Maxim Sloyko]

Hello, clp and all people reading it!
 Recently I was porting my (small) app from psycopg to psycopg2 (they
got me with this "2").
I read, that psycopg2 supports all features of psycopg and plus many
more, however, when I started to port, I discovered, that psycopg2
lacks serialized connections and "commit on cursor" completely. Did I
miss something or psycopg2 just isn't mature enough yet?

BTW, is there any postgresql engine, that can fake nested transactions
via savepoints feature?