第三次作业

#(1)遍历列表
print('列表的遍历：')
a=[1,2,3];
for i in a:
    print(i);
#(2)遍历元组
print('元组的遍历：')
a=(4,5,6);
for i in a:
   print(i);
#(3)遍历集合
print('集合的遍历：')
a={7,8,9}
for i in a:
    print(i);
#(4)遍历字典
print('字典的遍历：')
a={"姓名":"唐僧洗头爱飘柔","性别":"男","学号":123456789};
for key in a.keys():
    print(key,":",a.get(key));

　　

str2='''Cry on my shoulder
 
If the hero never comes to you
 
If you need someone you re feeling blue
 
If you re away from love and you re alone
 
If you call your friends and nobody s home
 
You can run away but you can t hide
 
Through a storm and through a lonely night
 
Then I show you there s a destiny
 
The best things in life
 
They re free
 
But if you wanna cry
 
Cry on my shoulder
 
If you need someone who cares for you
 
If you re feeling sad your heart gets colder
 
Yes I show you what real love can do
 
If your sky is grey oh let me know
 
There s a place in heaven where we ll go
 
If heaven is a million years away
 
Oh just call me and I make your day
 
When the nights are getting cold and blue
 
When the days are getting hard for you
 
I will always stay here by your side
 
I promise you I ll never hide
 
What real love can do
 
What love can do
 
What real love can do
 '''.lower()
print(str2)
str2 = str2.replace('’',' ')
str2 = str2.replace(':',' ')
str2 = str2.replace(',',' ')
str2 = str2.replace('.',' ')
str2 = str2.replace('？',' ')
str2 = str2.replace('！',' ')
str2 = str2.replace('\n',' ')
print(str2)
str2 = str2.strip()
str2 = str2.split(' ')
print(str2.count("love"))
print(str2)

　　

bl = 'https://edu.cnblogs.com/campus/gzcc/14NetworkEngineering/homework/870'
bl1 = bl.split('/')
classmates = ['Michael', 'Bob', 'Tracy', '李三', 'Tracy']
 
print(classmates[-1])
print(classmates[1:3])
print(len(classmates))
print(max(classmates))
print(min(classmates))
print(classmates.index('Tracy'))
print(classmates.count('Tracy'))
classmates[1] = 'Sarah'
print(classmates[1])
classmates.sort()  # 没有返回值，改变列表本身
print(classmates)
 
classmates.insert(1, 'Jack')
print(classmates)
 
classmates.append('Adam')
print(classmates)
classmates.extend(bl1)
print(classmates)
 
print(classmates.pop())
print(classmates.pop(1))