backup_pyfiles.py

'''
Backup .py, .ipynb files to other dierctory (ex. USB device)

Parameters
---
dir_to_root: str
  Directory path backup to, like '/media/user/USB_DISK/backup_here'

dir_from: str
  All .py, .ipynb files in this directory are back-up(recursively).

'''

import glob
import os
import re
import shutil
import sys

dir_to_root = '/media/....' # Parameter
dir_from = '/home/....' # Parameter

list_py = glob.glob(dir_from+'/**/*.py', recursive=True)
list_nb = glob.glob(dir_from+'/**/*.ipynb', recursive=True)
list_total = list_py+list_nb

for f in list_total:

    ma = re.search(dir_from+'(.*)?/(.*\.(py|ipynb))',f)
    
    dir_to_sub = ma.groups()[0]
    dir_to = dir_to_root + dir_to_sub
    
    filename = ma.groups()[1]

    content_device = glob.glob(dir_to+'/*')

    for g in content_device:
        # same sub dir+name 
        if dir_to_sub+'/'+filename in g:
            # same update time
            if int(os.stat(f).st_mtime) != int(os.stat(g).st_mtime):                
                os.makedirs(dir_to, exist_ok=True)
                shutil.copy2(f, dir_to)
            break

st_mtime have 1 second range, probably from "round" function