Can't connect the postgreSQL with psycopg2

Question

It\'s the first time that I can\'t find the answer about some tech problems Here\'s my problems:

>> conn=psycopg2.connect(database=\"mydb\", user=\"pos         


        

Answer 1

Having this happen to me after a brew upgrade, I googled for brew .s.PGSQL.5432.

Per the suggestion in this answer I ran the following:

postgres -D /usr/local/var/postgres

And got:

2019-10-29 17:43:30.860 IST [78091] FATAL:  database files are incompatible with server
2019-10-29 17:43:30.860 IST [78091] DETAIL:  The data directory was initialized by PostgreSQL version 10, which is not compatible with this version 11.5.

I googled that FATAL error and per the suggestion in this answer I ran:

brew postgresql-upgrade-database

That solved it for me.