1.名字转换

def normalize(name):

    name = name[0].upper() + name[1:].lower()

    return name

2.乘法运算

from functools import reduce

def Multiply(x, y):

    return x * y

def prod(L):

    if not isinstance(L, Iterable):

        raise TypeError('参数必须是Iterable')

    return reduce(Multiply, L)

3.str转换成float

from functools import reducedef str2float(S):    if not isinstance(S, str):        raise TypeError('参数类型必须是str')    digits = {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9, '.':-1}    def char2num(S):        return digits[S]    nums = list(map(char2num, S))    point = 0    def fn(x, y):        nonlocal point        if y == -1:            point = 1            return x        if point == 0:            return x * 10 + y        else:            point = point * 10            return x + y / point    return reduce(fn, nums)