实现A1引用样式

A1Notation.py

#!/usr/bin/python
#-*- coding: UTF-8 -*- 

def getA1Notation(num):
    if num == 0 :
        print('A')

    notations = []
    alphabetNum = 26
    while num != 0:
        notation = (num-1) % alphabetNum
        num = (num-1)/alphabetNum
  
        notations.append(chr(notation+ord('A')))

    A1Notation = ""
    for notation in reversed(notations):
        A1Notation = A1Notation + notation

    return A1Notation

if __name__ == "__main__":
    print(getA1Notation(703))