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GeezerVison is showing github.com — Python-Practice/char2float.py at master · pythonkd/Python-Practice Expand file tree/ Copy pathchar2float.pyMore file actions 17 lines (17 loc) · 567 Bytes / Copy pathchar2float.pyFile metadata and controls17 lines (17 loc) · 567 Bytes 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 from functools import reduce def str2float(s): a=reduce(num2int,map(char2num,s.split('.')[0])) b=int2float(reduce(num2int,map(char2num,s.split('.')[1])),len(s.split('.')[1])) return a+b def char2num(s): digits={'0':0,'1':1,'2':2,'3':3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9} return digits[s] def num2int(x,y): return x*10+y def int2float(s,n): return s*pow(10,-n) print('str2float(\'123.456\') =', str2float('123.456')) if abs(str2float('123.456') - 123.456) < 0.00001: print('测试成功!') else: print('测试失败!') |
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