示例：常用操作

  1. import psycopg2
  3. # psycopg2常用链接方式
  4. 1. conn = psycopg2.connect(dbname="postgres", user="user", password="password", host="localhost", port=port)
  5. 2. conn = psycopg2.connect("dbname=postgres user=user password=password  host=localhost port=port")
  7. # 创建连接对象
  8. conn=psycopg2.connect(database="postgres",user="user",password="password",host="localhost",port=port)
  9. cur=conn.cursor() #创建指针对象
  11. # 创建连接对象（SSl连接）
  12. conn = psycopg2.connect(dbname="postgres", user="user", password="password", host="localhost", port=port,
  13.          sslmode="verify-ca", sslcert="client.crt",sslkey="client.key",sslrootcert="cacert.pem")
  14. 注意： 如果sslcert, sslkey,sslrootcert没有填写，默认取当前用户.postgresql目录下对应的client.crt，
  15.          client.key， root.crt
  18. # 创建表
  19. cur.execute("CREATE TABLE student(id integer,name varchar,sex varchar);")
  21. # 插入数据
  22. cur.execute("INSERT INTO student(id,name,sex) VALUES(%s,%s,%s)",(1,'Aspirin','M'))
  23. cur.execute("INSERT INTO student(id,name,sex) VALUES(%s,%s,%s)",(2,'Taxol','F'))
  24. cur.execute("INSERT INTO student(id,name,sex) VALUES(%s,%s,%s)",(3,'Dixheral','M'))
  26. # 获取结果
  27. cur.execute('SELECT * FROM student')
  28. results=cur.fetchall()
  29. print (results)
  31. # 关闭连接
  32. conn.commit()
  33. cur.close()
  34. conn.close()
  36. # 使用日志
  37. import logging
  38. import psycopg2
  39. from psycopg2.extras import LoggingConnection
  41. logging.basicConfig(level=logging.DEBUG) # 日志级别
  42. logger = logging.getLogger(__name__)
  44. db_settings = {
  45.     "user": "user",
  46.     "password": "password",
  47.     "host": "localhost",
  48.     "database": "postgres",
  49.     "port": port
  50. }
  51. conn = psycopg2.connect(connection_factory=LoggingConnection, **db_settings)
  52. conn.initialize(logger)