# from collections import Iterable#collections模块的Iterable类型判断# dict1 = {'a':111,'b':222,'c':333}# print(dict1.keys())#dict_keys(['a', 'b', 'c'])# print(dict1.values())#dict_values([111, 222, 333])# print(dict1.items())#dict_items([('a', 111), ('b', 222), ('c', 333)])# for key,value in dict1.items():#     print(key,'---',value)# #a --- 111# #b --- 222# #c --- 333# print(isinstance('abc',Iterable))#True  str是否可迭代# print(isinstance([1,2,3],Iterable))#True    list是否可迭代# print(isinstance(123,Iterable))#False   整数是否可迭代# for i,item in enumerate(['a','b','c']):#list下标循环，内置的enumerate函数可以把一个list变成索引-元素对#     print(i,'---',item)# #0 --- a# #1 --- b# #2 --- c# for x,y in [(1,11),(2,22),(3,33)]:#     print(x,'---',y)# #1 --- 11# #2 --- 22# #3 --- 33arr = [1,2,3,4,5,6,1,3,9]def findMaxMin(arr):    max = 0    min = 0    if not isinstance(arr,(list)):        print('传入的不是list')        return    else:        for i,item in enumerate(arr):            if i == 0:                min = item            elif item < min:                min = item            elif item > max:                max = item    return (max,min)print(findMaxMin(arr))