python 统计一个文件夹下面的所有txt文档都有多少行

# encoding: utf-8
import os, re

def get_filename(filepath, filetype):
    import os
    filename = []
    for root, dirs, files in os.walk(filepath):
        for i in files:
            if filetype in i:
                filename.append(i)
    return filename

def main():
    srcfilepath = r'E:\Pycharm_projects\English_2s_original'
    filetype = '.txt'
    filename = get_filename(srcfilepath, filetype)
    #对取得的文件夹下的文件按English？_dec.txt排序
    filename.sort(key=lambda x: int(x.split('h')[-1].split('_')[0]))

    for i in range(len(filename)):
        #each = srcfilepath+'//'+'English'+str(i+1)+'_dec'+'.txt'
        each = srcfilepath+'//'+filename[i]
        f = open(each, 'r')
        cont = f.readlines()
        print each, len(cont)

main()