import psycopg2

try:
        conn = psycopg2.connect(
            dbname="kolchin",
            user="kolchin",
            password="postgres",
            host="postgres_new",
            port="5432"
        )
except:
         print('Can`t establish connection to database')


cursor = conn.cursor()

cursor.execute('CREATE TABLE IF NOT EXISTS tablee(name varchar(10) NOT NULL,surname varchar,city varchar,age smallint);')

conn.commit()
cursor.close() # закрываем курсор
conn.close() # закрываем соединение