# python3

import os
import fnmatch

with open('report.txt','w',encoding='utf8') as report:
    for path,dirs,files in os.walk('d:/dev/boost_1_50_0/boost'):
        for file_ in fnmatch.filter(files,'*.hpp'):
            filename = os.path.normpath(os.path.join(path,file_))
            with open(filename,'rb') as testfile:
                data = testfile.read()
            try:
                data.decode('ascii')
            except UnicodeDecodeError as e:
                line = data[:e.start].count(b'\n')
                data = data.decode('latin-1').split('\n')
                report.write('{}({}) : {}\n'.format(filename,line,data[line]))