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

>>>

希望本文所述对大家Python程序设计有所帮助。