Question

import os 
folder = 'C:/Python27/Data'
for the_file in os.listdir(folder):
    file_path = os.path.join(folder, the_file)
    try:
        if os.path.isfile(file_path):
            os.unlink(file_path)
    except Exception, e:
        print e

这是我用来从目录中删除文本文件的代码，但我想删除特定文件，根据一些关键字过滤它们。如果文本文件中没有包含单词＆＃34; dollar＆＃34;，则将其从文件夹中删除。这应该对目录中的所有文件完成。

Answer 1

如果文件相当小，那么以下简单的解决方案就足够了：

if os.path.isfile(file_path): # or some other condition
    delete = True             # Standard action: delete
    try:
        with open(file_path) as infile:
            if "dollar" in infile.read(): # don't delete if "dollar" is found
                delete = False 
    except IOError:
        print("Could not access file {}".format(file_path))
    if delete: 
        os.unlink(file_path)

如果文件非常大并且您不想将它们完全加载到内存中（特别是如果您希望在文件的早期发生搜索文本），请使用以下内容替换上面的with块：

        with open(file_path) as infile:
            for line in file:
                if "dollar" in line:
                    delete = False
                    break

删除特定的文本文件

1 个答案: