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| def normalize(name): return name.capitalize()
L1 = ['adam', 'LISA', 'barT'] L2 = list(map(normalize, L1)) print(L2)
from functools import reduce def prod(L): def prod1(x, y): return x * y return reduce(prod1, L)
print('3 * 5 * 7 * 9 =', prod([3, 5, 7, 9]))
''' 先记住这个结果,等会实现需要用到 a = '123.456' n = a.index('.') b = [x for x in a[:n]] print(b) 结果: ['1', '2', '3'] ''' def str2float(s): def fn(x, y): return x * 10 + y n = s.index('.') s1 = list(map(int, [x for x in s[:n]])) s2 = list(map(int, [y for y in s[n+1: ]])) return reduce(fn,s1) + (reduce(fn, s2) / 10 ** len(s2))
print(str2float('123.456')) """ 输出结果:
['Adam', 'Lisa', 'Bart'] 3 * 5 * 7 * 9 = 945 123.456
"""
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