Question

我需要一个Python脚本，该脚本每5分钟监视一次目录更改，并仅复制添加的文件。不要从源目录复制现有文件。程序启动后复制文件。当我删除目标上的文件时，程序会复制文件。我的python版本是3.6.32

听到的是我的代码：

import os, time, subprocess, sys, shutil

t = 5
os.chdir('C:\\') 

print(os.path.isdir("C:\\Users\\Desktop\\source\\"))

path_to_watch = ("C:\\Users\\Desktop\\source\\")
before = dict ([(f, None) for f in os.listdir (path_to_watch)])

dir_src = ("C:\\Users\\Desktop\\source\\")
dir_dst = ("D:\\dest\\")

while True:
    for filename in os.listdir(dir_src):
        if filename.endswith('.txt'):
            shutil.copy(os.path.join(dir_src + filename), os.path.join(dir_dst + filename))
            time.sleep(t)

Answer 1

尝试此代码，我对您的代码做了一些修改。它将文件从源目录复制到目标。一旦复制了一个文件，即使在源或目标中将其删除，也不会复制该文件。它将仅复制新添加的文件。

import os, time, shutil

path_to_watch = "x/y/z/source"
destination = "a/b/c/destination"

source_files = set(os.listdir(path_to_watch))   # all the file names in the source directory is stored here.
new_files = set()    # this is for new files, new files will be updated in source_files too.

while True:
    for name in new_files:
        if name.endswith('.txt'):
            shutil.copy(os.path.join(path_to_watch,name), destination)   # copy files presnt in new_files
    time.sleep(5*60)

    new_files = set(os.listdir(path_to_watch))   # get current files present in source_directory
    new_files = new_files - source_files         # check if there are actually new files 
    if new_files:     # if there is a new file
        source_files = source_files.union(new_files)      # add that to source_file

启动后使用python程序复制文件

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