def log2hist(logfilename):
    regex = re.compile(r'user:\s+(\w+)\s+(?:.*\s+)?pages:\s+(\d+)')
    users = {}
    with open(logfilename,'r') as logfile:
        for line in logfile:
            match = regex.search(line)
            if match:
                user, pages = match.groups()
                users[user] = users.setdefault(user,0) + int(pages)
    with open('data','w') as datafile:
        for pages in users.values():
            datafile.write(str(pages)+'\n')
    runR()