[Dcayy]

Hello, guys. how can I compare all files in every dir and subdirs.
If any file from source dir is already in destination dir then don't backup it again just pass
I have made it now just to copy and paste every file from src to dest dirs every time when scripts is started
As example lets take these directories:
Source directory ->        /root/$USER/Desktop
Destination directory ->  /root/$USER/backup/Desktop

[Skidsuper]

If you are checking by simple filename you can raise exception if file exists by passing os.O_EXCL in your open() funtion.
See this for more info.
https://stackoverflow.com/questions/3044...-in-python

[caijad]

Hello, guys. how can I compare all files in every dir and subdirs.
If any file from source dir is already in destination dir then don't backup it again just pass
I have made it now just to copy and paste every file from src to dest dirs every time when scripts is started
As example lets take these directories:
Source directory ->        /root/$USER/Desktop
Destination directory ->  /root/$USER/backup/Desktop

Code

from os import listdir,getcwd,chdir,mkdir
from os.path import isdir,join
from shutil import copy2
from sys import platform
def get_first_root():
   return getcwd()

def create_folder(directory):
   try:
       mkdir(directory)
   except:
       pass

def get_name(directory):
   if platform =='win32':
       return directory.split('\\')[-1]
   else:
       return directory.split('/')[-1]

def _directory_destiny(start,name):
   return join(start,name)

def backup(start,directory_to_copy):
   name=get_name(directory_to_copy)
   root_with_directory=_directory_destiny(start,name)
   create_folder(root_with_directory)
   for file in listdir(directory_to_copy):
       chdir(root_with_directory)
       if isdir(join(directory_to_copy,file)):
           backup(root_with_directory,join(directory_to_copy,file))
       else:
           if file not in listdir(root_with_directory):
               copy2(join(directory_to_copy,file),root_with_directory)
           else:
               print('{} alredy exists'.format(join(directory_to_copy,file)))

I Hope that this work for you

[Lycosidae024]

Also, depending on how you are wanting to implement it, you can use someone similar to this which is pretty simple

Code

import os
import shutil
# /root/$USER/Desktop
# /root/$USER/backup/Desktop

source_files = "/root/$USER/Desktop"
destination_files = "/root/$USER/backup/Desktop"
source_files_array = os.listdir(source_files)
destination_files_array = os.listdir(destination_files)

for item in source_files_array:
    if not item in destination_files_array:
        if os.path.isfile(source_files + "/" + item):
            shutil.copy((source_files + "/" + item), destination_files + "/" + item)