Python 将罗马数字转换成普通的阿拉伯数字，python阿拉伯,[Python]代码de

Python 将罗马数字转换成普通的阿拉伯数字，python阿拉伯,[Python]代码de

[Python]代码

def getRomanNum(RomanStr): """Roman numerals will be converted into digital,RomanStr is a RomanString"""     import re     if re.search('^M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})$',RomanStr)!=None:         NumDic = {"pattern":"","retNum":0}         RomanPattern = {             "0":('','','','M'),             "1":('CM','CD','D','C',100),             "2":('XC','XL','L','X',10),             "3":('IX','IV','V','I',1)             }             i = 3         NumItems = sorted(RomanPattern.items())         for RomanItem in NumItems:             if RomanItem[0] != '0':                 patstr = NumDic["pattern"].join(['',RomanItem[1][0]])                 if re.search(patstr,RomanStr) != None:                     NumDic["retNum"] += 9*RomanItem[1][4]                     NumDic["pattern"] = patstr                 else:                     patstr = NumDic["pattern"].join(['',RomanItem[1][1]])                     if re.search(patstr,RomanStr) != None:                         NumDic["retNum"] += 4*RomanItem[1][4]                         NumDic["pattern"] = patstr                     else:                         patstr = NumDic["pattern"].join(['',RomanItem[1][2]])                         if re.search(patstr,RomanStr) != None:                             NumDic["retNum"] += 5*RomanItem[1][4]                             NumDic["pattern"] = patstr             if NumDic["pattern"] == '':                 NumDic["pattern"] = '^'             tempstr = ''             sum = 0             for k in range(0,4):                 pstr = RomanItem[1][3].join(['','{']).join(['',str(k)]).join(['','}'])                 patstr = NumDic["pattern"].join(['',pstr])                 if re.search(patstr,RomanStr) != None:                     sum = k*(10**i)                     tempstr = patstr             if tempstr <> '':                 NumDic["pattern"] = tempstr             else:                 NumDic["pattern"] = patstr             NumDic['retNum'] += sum             i -= 1         return NumDic['retNum']     else:         print 'String is not a valid Roman numerals'