python连接postgresql数据库

# 数据库连接参数
conn = psycopg2.connect(database=database, user=user,password=password, host=host, port=port)
cur = conn.cursor()
cur.execute("SELECT  * from user where sex=\"男\" ;")
rows = cur.fetchall()        # all rows in table
# 将查询到的结果放入dataframe
df = pd.DataFrame(rows, columns=['ID','name','sex','phone'])