【Python练习】分类数据

将11,22,33,44,55,77,66,88,99,9 进行分类，以66为界限

代码1：

```

list1 =[11,22,33,44,55,77,66,88,99,91]
print(list1)
list2 =[]
list3 =[]
for i in list1:
    if i<66:
        print(i)
        list2.append(i)
    else:
        list3.append(i)

dict1 = {'k1':list2,'k2':list3}

print(dict1['k1'])
print(dict1['k2'])
```

优化后代码：
```
list1 =[11,22,33,44,55,77,66,88,99,91]
dict1={}
for i in list1:
    if i>66:
        if 'k1' in dict1.keys():
            dict1['k1'].append(i)
        else:
            dict1['k1']=[i,]
    else:
        if 'k2' in dict1.keys():
            dict1['k2'].append(i)
        else:
            dict1['k2'] = [i,]
print("小于66的数值：{0}".format(dict1['k1']))
print(dict1['k2'])

```

来自为知笔记(Wiz)