Python使用字典实现的简单记事本功能示例

本文实例讲述了Python使用字典实现的简单记事本功能。分享给大家供大家参考，具体如下：

本文实例讲述了Python使用字典实现的简单记事本功能。分享给大家供大家参考，具体如下：

from time import sleep, strftime
user = "Cytus"
calendar = {}
def welcome():
 print "Welcome to use this calendar. %s" % user
 print "Calendar is opening."
 sleep(1)
 print strftime("%A %B %d %Y")
 print strftime("%H:%M:%S")
 sleep(1)
 print "What would you like to do?"
def start_calendar():
 welcome()
 start = True
 while start:
 user_choice = raw_input("A to add, U to Update, V to View, D to Delete, X to Exit: ")
 user_choice = user_choice.upper()
 if user_choice == "V":
 if len(calendar.keys()) < 1:
 print "The calendar is empty."
 else:
 print calendar
 elif user_choice == "U":
 date = raw_input("What date? ")
 update = raw_input("Enter the update: ")
 calendar[date] = update
 print "Update successful."
 print calendar
 elif user_choice == "A":
 event = raw_input("Enter event: ")
 date = raw_input("Enter date (MM/DD/YYYY): ")
 if (len(date) > 10) or int(date[6:]) < int(strftime("%Y")):
 print "invaild date."
 try_again = raw_input("Try again? Y for yes, N for No: ")
 try_again = try_again.upper()
 if try_again == "Y":
 continue
 else:
 start = False
 else:
 calendar[date] = event
 print "Successfully added."
 print calendar
 elif user_choice == "D":
 if len(calendar.keys()) < 1:
 print "The calendar is empty."
 else:
 event = raw_input("What event? ")
 for date in calendar.keys():
 if calendar[date] == event:
 del calendar[date]
 print "Delete successfully."
 print calendar
 else:
 print "incorrect event was specified."
 elif user_choice == "X":
 start = False
 else:
 print "invalid input."
 start = False
start_calendar()

运行结果：

>>> Welcome to use this calendar. Cytus Calendar is opening. Thursday August 15 2019 11:25:13 What would you like to do? A to add, U to Update, V to View, D to Delete, X to Exit: A Enter event: www.jb51.net Enter date (MM/DD/YYYY): 08/15/2019 Successfully added. {'08/15/2019': 'www.jb51.net'} A to add, U to Update, V to View, D to Delete, X to Exit: V {'08/15/2019': 'www.jb51.net'} A to add, U to Update, V to View, D to Delete, X to Exit: A to add, U to Update, V to View, D to Delete, X to Exit: X >>>