练习三

strBig=(‘‘‘every night in my dreams
i see you, i feel you,
that is how i know you go on
far across the distance
and spaces between us
you have come to show you go on
near, far, wherever you are
i believe that the heart does go on
once more you open the door
and youre here in my heart
and my heart will go on and on
love can touch us one time
and last for a lifetime
and never let go till we‘re one
love was when i loved you
one true time i hold to
in my life we‘ll always go on
near, far, wherever you are
i believe that the heart does go on
once more you open the door
and you‘re here in my heart
and my heart will go on and on
there is some love that will not go away
you‘re here, there‘s nothing i fear,
and i know that my heart will go on
we‘ll stay forever this way
you are safe in my heart
and my heart will go on and on‘‘‘)

strList=strBig.split(‘ ‘)
print(strList)
a=str.upper(strBig)
print("全部大写:"+a)
b=str.lower(strBig)
print("全部小写:"+b)
print(strBig.count(‘you‘))
c=str.capitalize(strBig)
print("首字母大写其余小写:"+c)
d=str.title(strBig)
print("首字母大写:"+d)
e=str.swapcase(strBig)
print("大小写互换:"+e)
k=max(strBig)     ##max()
print(k)
m=min(strBig)
print(m)
strSet=set(strList)     ##字母出现的次数
for word in strSet:
    print(word,strList.count(word))

classmates=[‘Michael‘,‘Bob‘,‘Tracy‘,‘李三‘,‘Tracy‘,56]
a=classmates[1]      ##取元素片段
print("取元素片段:"+a)
b=classmates[-1]        ##取最后一个元素
print(b)
print(classmates[1:3])  ##取元素1:3
f=len(classmates)      ##取属性
print(f)
c=classmates.index(‘Tracy‘)   ##取元素的索引
print(c)
d=classmates[1]=‘Sarah‘    ##修改
print("修改为:"+d)
e=classmates.count(‘Tracy‘)  ##计数
print(e)
print(classmates)
h=classmates.insert(2,"Jack")   ##插入元素
print(h)
print(classmates)
i=classmates.append("Adam")    ##追加元素
print(i)
print(classmates)
j=classmates.pop(1)   ##删除元素
print(j)
print(classmates)

class1=(‘Micheal‘,‘Bob‘,‘Tracy‘,‘李三‘,‘Tracy‘,56)
print(len(class1))    ##取属性
a=tuple(‘abcde‘)   ##元组
print(a)

s={1,2,3}
a=s.add(4)
print(a)
print(s)
b=s.remove(4)
print(b)
print(s)
s=set([1,2,2,3,4])
s1=set([1,2,3])
s2=set([2,3,4])
g=s1 & s2    ##集合的交运算
print(g)
k=s1| s2     ##集合的并运算
print(k)
g=s2 - s1    ##集合的差运算
print(g)


classmates=[‘Michael‘,‘Bob‘,‘Tracy‘,‘李三‘,‘Tracy‘,56]
new=[‘Rose‘,‘Jack‘]
classmates.insert(2,‘Jack‘)
classmates.extend(new)    ##扩展
print(classmates)
classmatesSet=set(classmates)
print(classmatesSet)
z=classmatesSet.add(‘Rose‘)   ##增加元素
print(z)
print(classmatesSet)
w=classmatesSet.remove(‘Bob‘)   ##删除元素
print(w)
print(classmatesSet)

classmates=[‘Michael‘,‘Bob‘,‘Tracy‘]
scores=[95,75,85]
d={‘Bob‘:75,"Michael":95,‘Tracy‘:85}
print(d[‘Michael‘])   ##取值
print(len(d))    ##元素个数
‘Thomas‘ in d  ##判断Thomas是否在d中
d[‘Rose‘]=88   ##添加与修改
print(d.pop(‘Bob‘))  ##删除
print(d.keys())    ##输出元素的键
print(d.values())  ##输出元素的值
print(d.items())