Problem 22

"""
    Project Euler Project 22.
        ParseInput: get the list of names provided into a Python list.
        Sort input list into alpha order
        Iterate through the list totaling up the weighted score for each name.
        NameScore - given a name, compute its score (A=1, B=2, C=3...)
           NameScore is the sum of the value of the letters in the name
    """

def ParseInput(filename):
    from pyparsing import (delimitedList, QuotedString)
    grammar=delimitedList(QuotedString('"'))
    return list(grammar.parseFile(filename, parseAll=True))
class NameScorer(object):
    """
        When a NameScorer object is created, it is given an alphabet.
        All the characters in names passed to the score method must contain only
            characters in that alphabet.
    """
    def __init__(self, alphabet):
        self.valuedict=dict(zip(alphabet, range(1,len(alphabet)+1)))
    def score(self,name):
        return sum(self.valuedict[c] for c in name)

def main():
    nameList=ParseInput("problem22.txt")
    nameList.sort()
    ns=NameScorer("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 .'")
    return sum(i*ns.score(name) \
        for (i,name) in zip(range(1,len(nameList)+1), nameList))