字典练习

Posted 2021-03-13 forhowcar

1、有如下值集合 [11,22,33,44,55,66,77,88,99,90...]，将所有大于 66 的值保存至字典的第一个key中，将小于 66 的值保存至第二个key的值中

l=s.split()
print(l)
dic={}
for item in l:
    if item in dic:
        dic[item]+=1    #字典的赋值
    else:
        dic[item]=1
print(dic)

 

2、有字典{‘hello‘: 2, ‘alex‘: 2, ‘say‘: 1, ‘sb‘: 2}，获取字典的关键字

dic={‘hello‘: 2, ‘alex‘: 2, ‘say‘: 1, ‘sb‘: 2}
for i in dic:
    print(i)

>>>hello
alex
say
sb

 

3、有字典{‘hello‘: 2, ‘alex‘: 2, ‘say‘: 1, ‘sb‘: 2}，获取字典的值

dic={‘hello‘: 2, ‘alex‘: 2, ‘say‘: 1, ‘sb‘: 2}
for i in dic.values():
    print(i)

>>>
2
2
1
2

4、有字典{‘hello‘: 2, ‘alex‘: 2, ‘say‘: 1, ‘sb‘: 2}，获取字典的键值对

dic={‘hello‘: 2, ‘alex‘: 2, ‘say‘: 1, ‘sb‘: 2}
for i,v in dic.items():
    print(i,v)

>>>
hello 2
alex 2
say 1
sb 2