将二级目录下的文件合并成一个文件的Python小脚本

这个小程序的目的是将二级目录下的文件全部合并成一个文件（其实几级目录都可以，只要做少许改动）

 #coding:utf8
 import sys, os

 def process(path):
     new_file = open("file_1", "a+")
     for secDir in os.listdir(path):
         for f in os.listdir(path + "/" + secDir):
             fin = open(path + "/" + secDir + "/" + f, "r")
             content = fin.readline()
             while len(content) > 0:
                 new_file.write(content)
                 content = fin.readline()
             fin.close()
     new_file.close()

 if __name__ == "__main__":
     process(sys.argv[1])

将这个程序稍作修改，可以实现只留下文件中的字母，去除其他字符的功能：

 #coding:utf8
 import sys, os
 import re

 def process(path):
     new_file = open("file_2", "a+")
     for secDir in os.listdir(path):
         for f in os.listdir(path + "/" + secDir):
             fin = open(path + "/" + secDir + "/" + f, "r")
             content = fin.readline()
             while len(content) > 0:
                 new_content = re.sub("[^a-zA-Z\r\n]+",' ', content)
                 new_file.write(new_content)
                 content = fin.readline()
             fin.close()
     new_file.close()

 if __name__ == "__main__":
     process(sys.argv[1])