python 从入门到实践第5章课后作业

python 从入门到实践课后作业整理

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第五章课后作业

#作业5-1
# a=2
# print("is a==2?I predict True.")
# print(a==2)
# print("is a==5?I predict False.")
# print(a==5)
# b='cat'
# print("Is b=='cat'?I predict True.")
# print(b=='cat')
# print("Is b=='dog'?I predict False.")
# print(b=='dog')
# list1=[1,2]
# print(list1==[1,2])
# yuanzu=(1,3)
# print(yuanzu==(2,4))
# print(list1[1]==2)
# print(list1[1]==3)
# 作业5-2
# a=1
# b=2
# c=3
# d=4
# e='little'
# f='letter'
# print(e==f)
# print(e.lower()<f.lower())
# print(a>b)
# print(a<=2)
# print(c<d)
# print(c>=3)
# print(a!=b)
# print((a>b)&(c<d))
# print((a==1)and(b==2))
# print((a<1)or(c>4))
# list2=['cat','dog']
# print('cat' in list2)
# print('dog' not in list2)
# print('dog ' not in list2)
# 作业5-3
# alien_color='green'
# if alien_color=='green':
#     print('you win 5 points')
# alien_color='red'
# if alien_color=='green':
#     print('you win 5 points')
# 作业5-4、5-5
# alien_color='red'
# if alien_color=='green':
#     print('you win 5 points')
# else:
#     print('you win 10 points')
# alien_color = 'green'
# if alien_color == 'green':
#     point=str(5)
# elif alien_color == 'yellow':
#     point=str(10)
# else:
#     point=str(15)
# print('you win '+point+' points')
# alien_color = 'yellow'
# if alien_color == 'green':
#     point=5
# elif alien_color == 'yellow':
#     point=10
# else:
#     point=15
# print('you win '+str(point)+' points')
# 作业5-6
# age=65
# if age<2:
#     poeple='baby'
# elif age<4:
#     poeple='learn to talk'
# elif age<13:
#     poeple = 'child'
# elif age<20:
#     poeple='qingnian'
# elif age<65:
#     poeple='chengnianren'
# elif age>=65:
#     poeple='old man'
# print('he is a '+poeple)
# 作业5-7
# favorite_fruit=['mango','grupe','watermeon']
# if 'mango' in favorite_fruit:
#     print('you really like mango')
# if 'grupe' in favorite_fruit:
#     print('you really like grupe')
# if 'watermeon' in favorite_fruit:
#     print('you really like watermeon')
# if 'banana' in favorite_fruit:
#     print('you really like banana')
# if 'apple' in favorite_fruit:
#     print('you really like appple')
# 作业5-8、5-9
# name_list=['admin','ann','mark','joy','tom']
# for name in name_list:
#     if name=='admin':
#         print("hello admin,would you like to see a status report?")
#     else:
#         print('hello '+name+',thank you for logging in again')
#
# while name_list:
#     name_list.pop()
# if name_list==[]:
#     print('we need to find some users!')
# 作业5-10
# current_users=['admin','ann','mark','joy','tom']
# new_users=['John','joy']
# for user in new_users:
#     if user.lower() in current_users:
#         print(user+' please use another name,this name has been used')
#     else:
#         print(user+' this name has not been used')
# 作业5-11
numbers=[1,2,3,4,5,6,7,8,9]
for number in numbers:
    if number==1:
        print(str(number)+'st')
    elif number==2:
        print(str(number) + 'nd')
    elif number==3:
        print(str(number) + 'rd')
    else:
        print(str(number)+'th')

总结

自学过程中的练习内容，留作以后翻看。