list和dict的操作

li = [11,22,33,44,55,66,77,88,99,90]

dic = {'k1':"大于66",'k2':"小于等于66"}

如以上所示，将所有li列表里面大于66的值保存至字典的第一个key，小于66的保存至第二个key中：

例子：

#coding:utf-8
'''
li = [11,22,33,44,55,66,77,88,99,90]
dic = {'k1':"大于66",'k2':"小于等于66"}
将li列表里面大于66的值保存至字典的第一个key，小于66的保存至第二个key中
'''


#例1
dic = {}
li_max = []
li_mix = []
li = [11,22,33,44,55,66,77,88,99,90]
for n in li:
    if n > 66:
        li_max.append(n)
    elif n <= 66:
        li_mix.append(n)
dic["k1"] = li_mix
dic["k2"] = li_mix
print(dic)


#例2
li = [11,22,33,44,55,66,77,88,99,90]
dic = {}
for n in li:
    if n >66:
        if 'k1' in dic.keys():
            dic["k1"].append(n)
        else:
            dic['k1'] = [n]

    elif n <= 66:
        if 'k2' in dic.keys():
            dic['k2'].append(n)
        else:
            dic['k2'] = [n]
print(dic)


#例3
#利用defaultdict默认字典（dict的value为list类型）
from collections import defaultdict
li = [11,22,33,44,55,66,77,88,99,90]
dic = defaultdict(list)
for n in li:
    if n >66:
        dic["k1"].append(n)
    elif n <= 66:
        dic['k2'].append(n)
print(dic)