《Head First Programming》---python 5_哈希与数据库

本章主要利用python的哈希(字典)和自带数据库sqlit3实现对外部数据库的访问，并显示相关的查找内容。

1.实现代码如下所示：

import sqlite3

def find_details(id2find):
    db = sqlite3.connect("surfersDB.sdb")
    db.row_factory = sqlite3.Row
    cursor = db.cursor()
    cursor.execute("select * from surfers")
    rows = cursor.fetchall()
    for row in rows:
        if row['id'] == id2find:
            s = {}
            s['id']      = str(row['id'])
            s['name']    = row['name']
            s['country'] = row['country']
            s['average'] = str(row['average'])
            s['board']   = row['board']
            s['age']     = str(row['age'])
            cursor.close()
            return(s)
    cursor.close()
    return({})

lookup_id = int(input("Enter the id for the surfer: "))
surfer = find_details(lookup_id)

if surfer:
    print("ID:         " + surfer['id'])
    print("Name:       " + surfer['name'])
    print("Country:    " + surfer['country'])
    print("Average:    " + surfer['average'])
    print("Board type: " + surfer['board'])
    print("Age:        " + surfer['age'])
else:
    print("None, Please check out the input id!")

2.运行结果：

Python 2.7.6 (default, Nov 10 2013, 19:24:18) [MSC v.1500 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> ================================ RESTART ================================
>>> 
Enter the id for the surfer: 102
ID:         102
Name:       Juan Martino
Country:    Spain
Average:    9.01
Board type: Gun
Age:        36
>>> ================================ RESTART ================================
>>> 
Enter the id for the surfer: 119
None, Please check out the input id!
>>>