回到他的需求：
1，可以新增记录，2，可以查询，3，可以全部展示，4，可以删除，5，可以更新。
那么我们先把大框架搭起来：
class Contact(object):
def __init__(self):
pass
def search_contact(self, args):
pass
def display_all(self):
pass
def update_number(self, new_number):
pass
def delete_contact(self):
pass
看，一个类，Contact，还有包括初始化在内的5个方法，已经涵盖了我们的要求了
然后搭好所有的类
别忘了：
1，你要在一个list里保存所有的信息，所以要定义在class中
2，search和display应该是classmethod
3，update应他要求，也做成了classmethod
class Contact(object):
con = []
def __init__(self):
self.f = None
self.l = None
self.n = None
self.a = None
self.list = []
def setup_ins(self):
'''f as first name,l as last name,n as number,a,as address,con as all_contacts'''
self.f = str(input('input first name:'))
self.l = str(input('input last name:'))
self.n = str(input('input number:'))
self.a = str(input('input address:'))
# print(self.f, self.l, self.n, self.a)
if self.f == '' or self.l == '' or self.n == '' or self.a == '':
return 0
else:
self.list.extend([self.f, self.l, self.n, self.a])
Contact.con.append(self.list)
@classmethod
def search_contact(cls, args):
if args == '':
return 0
else:
for obj in Contact.con: # first list
if args in obj: # searching in second list
print(obj)
return 1
else:
print('no such a record!')
@classmethod
def display_all(cls):
for obj in Contact.con:
print(obj)
@classmethod
def update_number(cls, old_number, new_number):
for obj in Contact.con: # first list
if old_number in obj: # searching in second list
i = Contact.con.index(obj)
j = obj.index(old_number)
Contact.con[i][j] = new_number
return 1
else:
return 0
def delete_contact(self):
i = Contact.con.index(self.list)
Contact.con.pop(i)
下面是调用的部分：
while 1:
print('<<<<<<<<<<<<<<<<<<<<<<make a choice>>>>>>>>>>>>>>>>>>>>>>>')
print('<<<<<<<<<<<<<<<<<<<<<<(1)add record>>>>>>>>>>>>>>>>>>>>>>>')
print('<<<<<<<<<<<<<<<<<<<<<<(2)search record>>>>>>>>>>>>>>>>>>>>>>>')
print('<<<<<<<<<<<<<<<<<<<<<<(3)show all record>>>>>>>>>>>>>>>>>>>>>>>')
print('<<<<<<<<<<<<<<<<<<<<<<(4)delete record>>>>>>>>>>>>>>>>>>>>>>>')
print('<<<<<<<<<<<<<<<<<<<<<<(5)update record >>>>>>>>>>>>>>>>>>>>>>>')
print('<<<<<<<<<<<<<<<<<<<<<<(6)exit >>>>>>>>>>>>>>>>>>>>>>>')
choice = input('make your choice(1/2/3/4/5/6):')
# print(type(choice)) # debug
if choice == '1':
user_name = str(input('type a user_name:'))
res = 1
exec('%s = Contact()' % user_name)
exec('res = %s.setup_ins()' % user_name)
if res == 0:
print('error please completely input!')
exec('del(%s)' % user_name)
continue
# Contact.display_all() # debug
elif choice == '2':
search_obj = str(input('what do you want to search:'))
res = Contact.search_contact(search_obj)
if res == 0:
print('input something!')
continue
elif choice == '3':
Contact.display_all()
continue
elif choice == '4':
delete_name = str(input('who do you want to delete:'))
exec('%s.delete_contact()' % delete_name)
continue
elif choice == '5':
old_num = str(input('type old number:'))
new_num = str(input('type new number:'))
res = Contact.update_number(old_num, new_num)
if res == 1:
print('success!')
else:
print('failed!')
continue
elif choice == '6':
print('bye!')
break
else:
print('wrong input! only 1,2,3,4,5 or 6!')
continue
代码都很简单，不做过多解释，重在理解class的概念