016序列

序列：包括列表、元祖和字符串等，共同特点如下：

1）都可以通过索引得到每一个元素

2）默认索引值总是从0开始（Python还支持负数索引）

3）可以通过分片的方法得到一个范围内的元素的集合

4）有很多共同的操作符（重复操作符*、拼接操作符+、成员关系操作符in）

>>> a='I love FishC.com'
>>> list(a)
['I', ' ', 'l', 'o', 'v', 'e', ' ', 'F', 'i', 's', 'h', 'C', '.', 'c', 'o', 'm']
>>> max(1,3.14,556,-5)
556
>>> min(1,3.14,556,-5)
-5
>>> tuple1=[1,2,3,4,5,6]
>>> max(tuple1)
6
>>> sum(tuple1)
21
>>> sum(tuple1,100)
121
>>> sorted(tuple1)
[1, 2, 3, 4, 5, 6]
>>> reversed(tuple1)
<list_reverseiterator object at 0x000001CFD1D2CA58>
>>> list(reversed(tuple1))
[6, 5, 4, 3, 2, 1]
>>> enumerate(tuple1)
<enumerate object at 0x000001CFD1D22FC0>
>>> list(enumerate(tuple1))
[(0, 1), (1, 2), (2, 3), (3, 4), (4, 5), (5, 6)]

list:len/sum/max/min/sorted/renversed/enumerate/zip

max=tuple1[0]

for each in tuple1:
    if each>max:
        max=each

return max

def min(x):
    least = x[0]

    for each in x:
        if each < least:
            least = each

    return least

print(min('123456789'))

def sum(x):
    result = 0
    
    for each in x:
        if (type(each) == int) or (type(each) == float):
            result += each
        else:
            continue

    return result

print(sum([1, 2.1, 2.3, 'a', '1', True]))

 

 

def sum(x):

    result = 0

   

    for each in x:

        if (type(each) == int) or (type(each) == float):

            result += each

        else:

            continue

 

    return result

 

print(sum([1, 2.1, 2.3, 'a', '1', True]))