python寫一個通信錄V2.0
python寫一個通信錄step by step V2.0
引用知識python
list + dict用於臨時存儲用戶數據信息mysql
cPickle用於格式化文件存取sql
依舊使用file來進行文件的存儲數據庫
解決問題
一、操刀開始去作
原始代碼 實現功能（可作模板）app
一、判斷輸入內容是否在給出的menu目錄內，在的話，返回對應結果，不在就報錯ide
二、調用os模塊的exit功能函數
三、字典配合循環加上函數實現switch的功能測試
#!/usr/bin/env python
#coding:utf8
#Author:zhuima
#Date:2015-03-22
#Version:0.1
#Function:display a list and add date
# 導入模塊
import os
def menu():
'''設置munu目錄，提供給用戶的操做接口 '''
print '''
1.add user info
2.disp all user info
3.update user info by username
4:del user by username
5:sort user info by
0.exit program
'''
op = raw_input('Please select one >>> ')
return op
def txl_exit():
''' 退出程序 '''
os._exit(0)
def txl_error():
''' 當用戶輸出選項不在定義的選項內的時候，報錯'''
print
print 'Unkonw options,Please try again!'
# 定義dict，配合函數實現switch功能
ops = {
# '1':txl_add,
# '2':txl_dis,
# '3':txl_update,
# '4':txl_del,
# '5':txl_sort,
'0':txl_exit,
}
def main():
'''主程序 '''
while True:
op = menu()
ops.get(op,txl_error)()
if __name__ == '__main__':
main()
二、添加用戶
思路ui
默認定義一個空list,而後嵌套dict來實現臨時存儲功能spa
一、添加的代碼
# 導入模塊 import os txl = [] .... def txl_add(): '''添加用戶''' name = raw_input('Please Enter Your Name >>> ') age = raw_input('Please Enter Your Age >>> ') gender = raw_input('Please Enter Your Gender >>> ') tel = raw_input('Please Enter Your Tel >>> ') txl.append({'name':name,'age':age,'gender':gender,'tel':tel}) def txl_disp(): '''顯示原始的txl列表 ''' print txl ..... ops = { '1':txl_add, '2':txl_disp, # '3':txl_update, # '4':txl_del, # '5':txl_sort, '0':txl_exit, }二、測試結果[root@mysql01 day0330]# python v2_1.py 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 [] 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 1 Please Enter Your Name >>> zhuima Please Enter Your Age >>> 28 Please Enter Your Gender >>> f Please Enter Your Tel >>> 10086 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 [{'gender': 'f', 'age': '28', 'tel': '10086', 'name': 'zhuima'}] 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 0三、完整代碼塊
三、格式化輸出
格式化輸出，使用字典
格式化輸出：print "%(name)s\t%(age)s" % dict
一、添加代碼片斷def txl_disp(): '''顯示原始的txl列表 ''' print "name\tage\tgender\ttel" print "-----------------------" for x in txl: print "%(name)s\t%(age)s\t%(gender)s\t%(tel)s" % x
二、測試結果[root@mysql01 day0330]# python v2_1.py 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 name age gender tel ---------------------------- 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 name age gender tel ---------------------------- 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 1 Please Enter Your Name >>> zhuima Please Enter Your Age >>> 28 Please Enter Your Gender >>> f Please Enter Your Tel >>> 10086 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 1 Please Enter Your Name >>> nick Please Enter Your Age >>> 25 Please Enter Your Gender >>> m Please Enter Your Tel >>> 10010 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 1 Please Enter Your Name >>> kale Please Enter Your Age >>> 33 Please Enter Your Gender >>> f Please Enter Your Tel >>> 10011 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 name age gender tel ---------------------------- zhuima 28 f 10086 nick 25 m 10010 kale 33 f 10011 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 0
三、完整代碼
四、文件寫入與讀取
思路：
引入cPickle概念，cPickle對文件進行讀取與存入的格式化操做，
cPickle的loads功能(從文件中讀取文件，保證原有格式)和dumps（把相關格式的對象文件存放到文件中）功能
一、添加代碼塊# 導入模塊 import os import cPickle # 定義數據庫文件名 fname = 'contact.db' txl = [] ... def txl_add(): '''添加用戶''' .... #調用txl_save()模塊 txl_save() def txl_disp(): '''顯示原始的txl列表 作了二次調整，若是txl爲空，則打印木有文件存在，若是txl不爲空 則打印出數據信息''' if len(txl) > 0: print "name\tage\tgender\ttel" print '----------------------------' for x in txl: print "%(name)s\t%(age)s\t%(gender)s\t%(tel)s" % x else: print print ">>> This is a empty file,There is no infomation! >>>" def txl_save(): '''使用cPickle進行列表到字符串的轉換 而後寫入文件 ''' s = cPickle.dumps(txl) fp = file(fname,'w') fp.write(s) fp.close() def txl_load(): '''從文件讀取信息，而後使用cPickle進行字符串到列表的轉換''' if os.path.exists(fname): fp = file(fname) s = fp.read() fp.close() txl.extend(cPickle.loads(s))
二、寫入測試結果[root@mysql01 day0330]# ls test.py v2_1.py v2.py [root@mysql01 day0330]# python v2_1.py 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 >>> This is a empty file,There is no infomation! >>> 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 1 Please Enter Your Name >>> zhuima Please Enter Your Age >>> 25 Please Enter Your Gender >>> f Please Enter Your Tel >>> 10086 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 name age gender tel ---------------------------- zhuima 25 f 10086 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 1 Please Enter Your Name >>> nick Please Enter Your Age >>> 22 Please Enter Your Gender >>> m Please Enter Your Tel >>> 10010 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 name age gender tel ---------------------------- zhuima 25 f 10086 nick 22 m 10010 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 0 [root@mysql01 day0330]# ls contact.db test.py v2_1.py v2.py
三、讀取測試結果[root@mysql01 day0330]# python v2_1.py 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 name age gender tel ---------------------------- zhuima 25 f 10086 nick 22 m 10010 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 0 [root@mysql01 day0330]#
四、完整代碼
五、刪除用戶
思路：
根據用戶名來進行數據的刪除
先來看一個演示
案例演示如何刪除嵌套列表字典
In [6]: s Out[6]: [{'age': 25, 'name': 'zhuima'}, {'age': 33, 'name': 'nick'}] #第一個思路就是要使用del來進行字典的刪除，可是針對嵌套不生效 In [7]: for x in s: if x['name'] == 'zhuima': del x ...: print s ...: [{'age': 25, 'name': 'zhuima'}, {'age': 33, 'name': 'nick'}] # 後來使用列表的remove來進行刪除，成功 In [10]: for x in s: if x['name'] == 'zhuima': s.remove(x) ....: In [11]: s Out[11]: [{'age': 33, 'name': 'nick'}]一、代碼片斷def txl_del(): '''根據用戶名進行刪除用戶相應的信息，並進行數據存儲，若是用戶不輸人該如何''' name = raw_input('Please Enter Your Want To Delete name >>> ') for line in txl: if line['name'] == name: txl.remove(line) break #最後記得調用存入的函數，要否則刪除僅針對當前會話，沒有寫入文件 txl_save()二、測試效果[root@mysql01 day0330]# python v2_1.py 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 name age gender tel ---------------------------- zhuima 25 f 10086 nick 22 m 10010 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 4 Please Enter Your Want To Delete name >>> nick 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 name age gender tel ---------------------------- zhuima 25 f 10086 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 0 [root@mysql01 day0330]# python v2_1.py 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 name age gender tel ---------------------------- zhuima 25 f 10086 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>>
三、完整代碼
六、根據用戶輸入自定義排序
思路：
根據用戶的選擇進行排序操做
引入功能，就是lambda txl.sort(key=lambda x : x[op])
一、代碼片斷def txl_sort(): '''根據用戶的輸入對數據進行排序，用到了lambda函數，有bug的，應該提供一個默認值出來進行排序''' op = raw_input('Order By [name | age | gender | tel ] Display >>> ') txl.sort(key=lambda x : x[op]) txl_disp()二、測試結果[root@mysql01 day0330]# python v2_1.py 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 name age gender tel ---------------------------- zhuima 25 f 10086 nick 22 m 10011 kale 29 f 10093 tony 18 m 10010 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 5 Order By [name | age | gender | tel ] Display >>> name name age gender tel ---------------------------- kale 29 f 10093 nick 22 m 10011 tony 18 m 10010 zhuima 25 f 10086 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 5 Order By [name | age | gender | tel ] Display >>> age name age gender tel ---------------------------- tony 18 m 10010 nick 22 m 10011 zhuima 25 f 10086 kale 29 f 10093 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>>
三、完整代碼
七、更新數據
思路：
方法一： 使用字典從新賦值便可實現更新(本案例演示採用的第一種方式)方法二： 根據索引找到對應的用戶所在的dict,而後對整個dict進行更新
根據索引找到對應的dict進行更新的案例演示In [38]: s Out[38]: [{'age': 44, 'name': 'zhuima'}, {'age': 33, 'name': 'nick'}] In [39]: for x in s: ....: if x['name'] == 'zhuima': ....: s[s.index(x)] = {'name':'zhuima521','age':28} ....: In [40]: s Out[40]: [{'age': 28, 'name': 'zhuima521'}, {'age': 33, 'name': 'nick'}] In [41]:一、代碼片斷def txl_update(status=True): '''根據用戶名對該用戶的相關數據進行更新操做,用戶名不可變，若是選項不更新，則保留默認值，不然更新''' txl_disp() name = raw_input('Select One Update By Name >>> ') for line in txl: if line['name'] == name: status = False old_age = line['age'] old_gender = line['gender'] old_tel = line['tel'] age = raw_input('Please Enter Your Age for %s >>> ' % name) gender = raw_input('Please Enter Your Gender for %s >>> ' % name) tel = raw_input('Please Enter Your Tel for %s >>> ' % name) if len(age) == 0: line['age'] = old_age else: line['age'] = age if len(gender) == 0: line['gender'] = old_gender else: line['gender'] = gender if len(tel) == 0: line['tel'] = old_tel else: line['tel'] = tel break if status: print "Unkonw User,Try Again!" txl_save()二、測試結果[root@mysql01 day0330]# python v2_1.py 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 name age gender tel ---------------------------- fuck 30 m 90000 kale 33 f 10093 tony 18 m 10010 zhuima 25 f 10086 max 32 f 20000 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 3 name age gender tel ---------------------------- fuck 30 m 90000 kale 33 f 10093 tony 18 m 10010 zhuima 25 f 10086 max 32 f 20000 Select One Update By Name >>> kale Please Enter Your Age for kale >>> Please Enter Your Gender for kale >>> Please Enter Your Tel for kale >>> 99999 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 2 name age gender tel ---------------------------- fuck 30 m 90000 kale 33 f 99999 tony 18 m 10010 zhuima 25 f 10086 max 32 f 20000 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>> 3 name age gender tel ---------------------------- fuck 30 m 90000 kale 33 f 99999 tony 18 m 10010 zhuima 25 f 10086 max 32 f 20000 Select One Update By Name >>> min Unkonw User,Try Again! 1.add user info 2.disp all user info 3.update user info by username 4:del user by username 5:sort user info by 0.exit program Please select one >>>
三、完整代碼
總結
至此，咱們使用dict完成了數據庫的增、刪、改、查、排序等操做
完整代碼
#!/usr/bin/env python
#coding:utf8
#Author:zhuima
#Date:2015-03-22
#Version:0.1
#Function:display a list and add date
# 導入模塊
import os
import cPickle
fname = 'contact.db'
txl = []
def menu():
'''設置munu目錄，提供給用戶的操做接口 '''
print '''
1.add user info
2.disp all user info
3.update user info by username
4:del user by username
5:sort user info by
0.exit program
'''
op = raw_input('Please select one >>> ')
return op
def txl_add():
'''添加用戶'''
name = raw_input('Please Enter Your Name >>> ')
age = raw_input('Please Enter Your Age >>> ')
gender = raw_input('Please Enter Your Gender >>> ')
tel = raw_input('Please Enter Your Tel >>> ')
txl.append({'name':name,'age':age,'gender':gender,'tel':tel})
txl_save()
def txl_disp():
'''顯示原始的txl列表 '''
if len(txl) > 0:
print "name\tage\tgender\ttel"
print '----------------------------'
for x in txl:
print "%(name)s\t%(age)s\t%(gender)s\t%(tel)s" % x
else:
print
print ">>> This is a empty file,There is no infomation! >>>"
def txl_save():
'''對數據進行寫操做，寫以前進行格式轉換'''
s = cPickle.dumps(txl)
fp = file(fname,'w')
fp.write(s)
fp.close()
def txl_load():
'''對文件進行讀取，若是文件存在的狀況下 '''
if os.path.exists(fname):
fp = file(fname)
s = fp.read()
fp.close()
txl.extend(cPickle.loads(s))
def txl_update(status=True):
'''根據用戶名對該用戶的相關數據進行更新操做,用戶名不可變，若是選項不更新，則保留默認值，不然更新'''
txl_disp()
name = raw_input('Select One Update By Name >>> ')
for line in txl:
if line['name'] == name:
status = False
old_age = line['age']
old_gender = line['gender']
old_tel = line['tel']
age = raw_input('Please Enter Your Age for %s >>> ' % name)
gender = raw_input('Please Enter Your Gender for %s >>> ' % name)
tel = raw_input('Please Enter Your Tel for %s >>> ' % name)
if len(age) == 0:
line['age'] = old_age
else:
line['age'] = age
if len(gender) == 0:
line['gender'] = old_gender
else:
line['gender'] = gender
if len(tel) == 0:
line['tel'] = old_tel
else:
line['tel'] = tel
break
if status:
print "Unkonw User,Try Again!"
txl_save()
def txl_del():
'''根據用戶名進行刪除用戶相應的信息，並進行數據存儲'''
name = raw_input('Please Enter Your Want To Delete name >>> ')
for line in txl:
if line['name'] == name:
txl.remove(line)
break
txl_save()
def txl_sort():
'''根據用戶的輸入對數據進行排序，用到了lambda函數 '''
op = raw_input('Order By [name | age | gender | tel ] Display >>> ')
txl.sort(key=lambda x : x[op])
txl_disp()
def txl_exit():
''' 退出程序 '''
os._exit(0)
def txl_error():
''' 當用戶輸出選項不在定義的選項內的時候，報錯'''
print
print 'Unkonw options,Please try again!'
# 定義dict，配合函數實現switch功能
ops = {
'1':txl_add,
'2':txl_disp,
'3':txl_update,
'4':txl_del,
'5':txl_sort,
'0':txl_exit,
}
txl_load()
def main():
'''主程序 '''
while True:
op = menu()
ops.get(op,txl_error)()
if __name__ == '__main__':
main()
相關文章
- 1. python寫一個通信錄step by step V3.0
- 2. python寫一個通信錄之step by step
- 3. [py]python寫一個通信錄step by step V3.0
- 4. 手寫一個RPC通信
- 5. Flutter仿寫一個iOS風格的通信錄
- 6. 用C++寫一個電話通訊錄
- 7. python寫一個通訊錄之step by step
- 8. Android製做的一個通信錄
- 9. python寫一個錄音小程序
- 10. 用python寫一個錄音小工具
- 更多相關文章...
- • 第一個MyBatis程序 - MyBatis教程
- • 第一個Hibernate程序 - Hibernate教程
- • RxJava操作符（一）Creating Observables
- • Kotlin學習（一）基本語法
相關標籤/搜索
每日一句
-
每一个你不满意的现在，都有一个你没有努力的曾经。
最新文章
歡迎關注本站公眾號,獲取更多信息
