这篇文章主要介绍了Python将阿拉伯数字转换为罗马数字的方法,涉及Python字符串转换及流程控制的相关技巧,具有一定参考借鉴价值,需要的朋友可以参考下
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 < 1 or 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 <= 3:
- while modNum > 0:
- str = str.join(['',item[1][0]])
- modNum -= 1
- elif modNum < 5:
- str = item[1][1]
- elif modNum == 5:
- str = item[1][2]
- elif modNum < 9:
- str = item[1][2]
- while modNum > 5:
- str = str.join(['',item[1][0]])
- modNum -= 1
- else:
- str = item[1][3]
- else:
- while 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。
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