Python/psycopg2 WHERE IN statement

For the IN operator, you want a tuple instead of list, and remove parentheses from the SQL string.

# using psycopg2
data=('UK','France')

sql="SELECT * from countries WHERE country IN %s"
cur.execute(sql,(data,))

During debugging you can check that the SQL is built correctly with

cur.mogrify(sql, (data,))