Excel Sheet Column Number
Related to question Excel Sheet Column Title
Given a column title as appear in an Excel sheet, return its corresponding column number.
For example:
    A -> 1
    B -> 2
    C -> 3
    ...
    Z -> 26
    AA -> 27
    AB -> 28 
python code
class Solution:
    # @param {string} s
    # @return {integer}
    def titleToNumber(self,s):
          ss=list(s)
          summ=0
          while len(ss)>=1:
                num=(ord(ss[0])-64)    #26进制
                summ=summ*26+num
                ss.pop(0)
          return summ
leetcode Excel Sheet Column Number python
原文:http://www.cnblogs.com/bthl/p/4574535.html