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
]+",' ', content)
                new_file.write(new_content)
                content = fin.readline()
            fin.close()
    new_file.close()

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