Python函数实现学员管理系统

import time
def main():
  '''主函數'''
  while True:
 sl(),select_function()
 sl()
 user_input = input('select your operation: ')
 ifuser_input == '1':
sl(),add_op()
 elif user_input == '2':
sl(),delete_op()
 elif user_input == '3':
sl(),alter_op()
 elif user_input == '4':
sl(),search_op()
 elif user_input == '5':
sl(),print_op()
 elif user_input == '6':
print('\n system quit.')
break
 else:
sl(),print('\n plz enter correct number.')

def select_function():
  '''顯示系統功能'''
  print("\n1.add mbr\n2.delete mbr\n3.change info\
\n4.check info\n5.prt\'l info\n6.exit sys\n")
  sl()
def store_new_info():
  a = input('enter name: ').title()
  b = input('enter age: ').title()
  c = input('enter gender: ').title()
  return a,b,c
def add_op():
  '''添加新人'''
  name,age,gender = store_new_info()
  for i in all_info:
 if name == i['name'].strip():
print(f'{name} is existed.retry plz')
break
  else:
 dict_inf = {}
 dict_inf['name']= name
 dict_inf['age'] = age
 dict_inf['gender'] = gender
 all_info.append(dict_inf)
 print(f'{name} added.')
def delete_op():
  '''刪除已有人物'''
  del_nam = input('type the name to del:').title()
  for i in all_info:
 if del_nam == i['name'].strip():
all_info.remove(i)
sl(),print(f'{del_nam} is removed.')
  else:
 sl(),print(f'no {del_nam} in list now.')
def alter_op():
  '''修改現有人物信息'''
  alter_nam = input('type the name who needs change: ').title()
  for i in all_info:
 if alter_nam != i['name'].strip():
continue
 else:
i['age'] = input('type new age: ')
i['gender'] = input('type new gender: ')
break
  else:
 sl(),print(f'no {alter_nam} in list.')
def search_op():
  '''查找某個人物的信息'''
  se_num = input('type name to search: ').strip().title()
  for i in all_info:
 if se_num != i['name'].strip():
continue
 else:
sl(),print(i)
break
def modify_op():
  '''統一name首字母大寫且左對齊'''
  b = 0
  for i in range(len(all_info)): 
 a = len(all_info[i].get('name').strip())
 b = max(a,b)
  for i in range(len(all_info)):
 all_info[i]['name']= all_info[i].get('name').strip().title().ljust(b,' ')
 all_info[i]['gender'] = all_info[i].get('gender').strip().title().ljust(6,' ')
def print_op():
  '''輸出所有人物的全部信息'''
  modify_op()
  for i in all_info:
 print('\n',i,'\n')
def sl():
 time.sleep(0.5)
all_info = []
main()