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# -*- coding: utf-8 -*- def normalize(name): return name.capitalize() L1 = ['adam', 'LISA', 'barT'] L2 = list(map(normalize, L1)) print(L2)
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# -*- coding: utf-8 -*- from functools import reduce from collections import Iterable def prod(L): if not isinstance(L,Iterable): raise TypeError('Parameter must be iterable') return reduce(lambda a,b:a*b,L) print('3 * 5 * 7 * 9 =', prod([3, 5, 7, 9]))
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# -*- coding: utf-8 -*- from functools import reduce def char2num(s): return {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9}[s] def str2float(s): if not isinstance(s, str): raise TypeError('Parameter must be str') if '.' not in s: return int(s) int_str, float_str = s.split('.') return reduce(lambda x, y: x * 10 + y, map(char2num, int_str + float_str)) / (10 ** len(float_str)) print('str2float(\'123.456\') =', str2float('123.456'))
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初见-好久不见
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