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作业3

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s凡s

#1 Created at ... [Delete] [Delete and Lock User] 
def str2float(s):
    DIGITS = {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9}
    def char2num(s):
        return DIGITS[s]
    s1,s2 = s.split(".");
    return reduce(lambda x,y : x*10+y, map(char2num, s1+s2)) / (10**len(s2))

s凡s

#2 Created at ... [Delete] [Delete and Lock User]

作业1：

def normalize(name):
    return name[:1].upper() + name[1:].lower()

作业2：

def prod(L):
    return reduce(lambda x,y: x*y, L)
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