1. python connect postgre
https://wiki.postgresql.org/wiki/Using_psycopg2_with_PostgreSQL Using psycopg2 with PostgreSQL
import psycopg2 import pprint
# get a connection, if a connect cannot be made an exception will be raised here conn = psycopg2.connect("dbname='db1' user='postgres' host='localhost' password='123'")# conn.cursor will return a cursor object, you can use this cursor to perform queries cursor = conn.cursor() # execute Query cursor.execute("SELECT * FROM department") # retrieve the records from the database records = cursor.fetchall() #records = cursor.fetchone() # print out the records using pretty print pprint.pprint(records)
