# _*_ coding : utf-8 _*_
# @Time : 2022/4/22 下午5:32
# @Author : weihaizhao
# @File : python高级特性
# @Project : python-code


# 切片 sliceFuc  sea tunnel


def slice_fuc():
    print("切片 sliceFuc************************")
    list = ['Michael', 'Sarah', 'Tracy', 'Bob', 'Jack']
    # 倒数第二
    print(list[-2])
    # 从索引0开始 取出2个元素
    print(list[0:2])
    # 从索引1开始 取出两个元素
    print(list[1:3])


# 迭代  iterateFun
def iterate_fun():
    print("迭代iterateFun************************")


# 列表生成式 listFun
# 生成器 builderFun
# 迭代器 iteratorFun

# 推导式
def clo_compre():
    # 列的推导式
    list_num = [num for num in range(1, 10)]
    print(list_num)

    list_name = [name * 3 for name in "abcdefg" if name == "a"]
    # ['aaa', 'bbb', 'ccc', 'ddd', 'eee', 'fff', 'ggg']
    print(list_name)

    # a --> 0 1 2, b -->0 1 4 9 16
    list_a_b = [(a, b * b) for a in range(3) for b in range(5)]
    print(list_a_b)

    # 生成器
    list_g = (num for num in range(1, 10))
    while True:
        try:
            e = next(list_g)
            print(e)
        except:
            print('没有更过元素了')
            break

    # 集合推导式
    list1 = [1, 2, 1, 2, 5, 6, 8, 9, 8, 7, 9]
    set1 = {x for x in list1 if x > 5}
    print(set1)

    # 3.字典推导式
    dict1 = {'a': 'A', 'b': 'B', 'c': 'C', 'd': 'C'}
    newdict = {value: key for key, value in dict1.items()}
    print(newdict)
    list_names = {"zhangsan", "lisi", "wangwu"}
    dict_names = {k: v for k, v in enumerate(list_names)}
    print(dict_names)








if __name__ == '__main__':
    clo_compre()
    # slice_use()
    """:type

    """