from functools import reduce def normalize(name): return str.title(name) # 测试: L1 = ['adam', 'LISA', 'barT'] L2 = list(map(normalize, L1)) print(L2) def prod(L): def f1(x,y): return x*y return reduce(f1,L) # 测试: print('3 * 5 * 7 * 9 =', prod([3, 5, 7, 9])) if prod([3, 5, 7, 9]) == 945: print('测试成功!') else: print('测试失败!') from functools import reduce digits = {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9} def str2float(s): num_str = '' #num_str记录数字(字符串格式) for i in range(len(s)): if s[i] == '.': p = i + 1 #p记录小数点的位置 else: num_str = num_str + s[i] def char2num(v): return digits[v] def f2(m,n): return m*10+n num_int = reduce(f2, map(char2num, num_str)) #num_int记录数字(整数格式) return num_int / 10 ** (len(s) - p) # 测试: print('str2float(\'123.456\') =', str2float('123.456')) print('str2float(\'12.3456\') =', str2float('12.3456')) if abs(str2float('123.456') - 123.456) < 0.00001: print('测试成功!') else: print('测试失败!')
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