本文实例讲述了python将阿拉伯数字转换为罗马数字的方法。分享给大家供大家参考。具体实现方法如下：
def numtoromannum(num): digital will be converted into roman numerals,ex: numtoromannum(3999) if num 3999: print 'the num must in 1-3999' else: numdic = { '1':('i','iv','v','ix'), '2':('x','xl','l','xc'), '3':('c','cd','d','cm'), '4':('m') } items = sorted(numdic.items()) retstr = '' for item in items: str = '' (num,modnum) = divmod(num,10) if modnum != 0: if item[0] != '4': if modnum 0: str = str.join(['',item[1][0]]) modnum -= 1 elif modnum 0: str = str.join(['',item[1][0]]) modnum -= 1 retstr = str.join(['',retstr]) return retstr
希望本文所述对大家的python程序设计有所帮助。