一、统计次数list.count():

def count():
    list1 = [1,5,3,6,4,[9,7,8,9],4,8,6,(9,7),4,1.21,2,3,4,6,'1']
    x =input('请输入需要的元素(请勿倒回输入，有错误直接删除)：')

    count = 0
    point = '.'
    # 整数判断
    if x.isdigit() == True:
        print('整数')
        x = int(x)
        for i in list1:
            if x == i:
                count+=1
    # 浮点判断
    elif x[0]!='(' and x[0]!='[' and x[0]!='{' and x[0]!="\'" and x[0]!='\"' and  x[0]!='{':
        print('浮点')
        if point in x :
            x = float(x)
        for i in list1:
            if x == i:
                count+=1
    # 字符串判断
    elif x[0] == "\'" or x[0]=='\"':
        print('字符串')
        for i in list1:
            if x[1:-1] == i:
                # print(x)
                count += 1
    # 序列判断
    else:
        print('序列',x)
        for i in list1:
            # print(x, str(i).replace(', ',','))
            if x ==str(i).replace(', ',','):
                print(x)
                count+=1
    print(count)
count()

二、序列添加list.extend()：

def extend(list1,list2):
    if type(list2)!=type(list1):
        temp = list(list2)
    return list1+temp
#
list1 = [1,2,3]
# list2 = (4,5,6)
list2 = {1,2,3}
list3 = extend(list1,list2)
print(list3)

三、获取下标list.index():

list1 = [1,5,3,6,4,[9,7,8,9],4,8,6,(9,7),4,1.21,2,3,4,6,'1']
def get_index(my_str):
    index = -1
    # 传入本身就是字符串
    if type(my_str)==type('asd'):
        for i in list1:
            index += 1
            if i== my_str:
                return index
    # 传入是其他类型的元素
    else:
        my_str_a = str(my_str)
        for i in list1:
            index += 1
            if str(i) == my_str_a:
                print(str(i),my_str_a)
                return index
num = get_index('1')
print(num)

四、顺序反转list.reverse():

def reverse(listx):
    index = len(listx)
    temp = listx[:]
    for i in range(index):
        listx[i]=temp[-i-1]
    del temp
    return listx
list1 = [1,2,3,4,5,6]
print(reverse(list1))