Directory watcher in 5 Minutes

I'm a mechanical engineer specialized on "NVH" (Noise Vibration Harshness). In some cases, when we try to test a mechanical component, we have to make a lot of measurements for a long period of time. NVH measurements need a lot of disk space and at the same time high speed write operations. This is why I decided to write code that helps me to automatically copy or move files from a given directory (local) to another (Network), depending on the age and file type or name.

To do that I decided to use python as programming language and to not use any library. You can clone it from https://github.com/tmeftah/dir-watcher

Step 1: create the app.py file an load the config file

import configparser

config = configparser.ConfigParser(allow_no_value=True)
config.read('conf.cfg')

Create a conf.cfg file

[SETTING]
timeinterval =  10
src_path = /dir_to_watch/*.txt
dist_path = /dir_to_save_to/test
operation = copy

timeinterval = how many minutes old show the file be

src_path = the source path where to look for the specific file patern

dist_path = the distination folder, where files have to be moved/copied to

operation = 'copy' for copy/paste or 'move' to cut/past

Step 2: read the configuration variables

# app.py
.
..
...

timeinterval = int(config.get('SETTING', 'timeinterval'))
src_path = config.get('SETTING', 'src_path')
dist_path = config.get('SETTING', 'dist_path')
operation = config.get('SETTING', 'operation')

Step 3: search for files that match the "src_path" pattern

# app.py
.
..
...

file_list = glob.glob(src_path) # get all files in scr_path folder

the search pattern on src_path are set according python package "glob.glob". for more infomation please see https://docs.python.org/3/library/glob.html

Step 4: loop through all files and move/copy them

# app.py
.
..
...
for file in file_list:
    file_datetime = datetime.fromtimestamp(os.path.getctime(file))
    filename = os.path.basename(file)    
    now = datetime.now()
    diff = now - file_datetime

    if diff.seconds > timeinterval :

        if operation == "copy":
            file_exist = os.path.isfile(os.path.join(dist_path,filename))                    
            if  file_exist:
                next
            else:
                try:
                    shutil.copy(file,os.path.join(dist_path,filename))
                    logging.info(f'file {filename} is copied successfully')                                                       
                except shutil.Error :
                    logging.error(f'copy file {filename} failed')
                    next

        if operation == "move":
            try:
                shutil.move(file,os.path.join(dist_path,filename))
                logging.info(f'file {filename} is moved successfully')
            except shutil.Error:
                logging.error(f'moving file {filename} failed')
                next

Step 5: Put all together

I add same logger and prints to track what this script did

import os
import sys
import glob
from datetime import datetime
import time
import shutil
import configparser
import logging
import ctypes


# set title of the console window
ctypes.windll.kernel32.SetConsoleTitleW("Dir-Watcher by Tarek Meftah")

logging.basicConfig(filename='log.log', filemode='a', format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',level=logging.INFO)


config = configparser.ConfigParser(allow_no_value=True)
config.read('conf.cfg')

timeinterval = int(config.get('SETTING', 'timeinterval'))
src_path = config.get('SETTING', 'src_path')
dist_path = config.get('SETTING', 'dist_path')
operation = config.get('SETTING', 'operation')


logging.info(100*'*')
logging.info('start watching')
logging.info(f'src_path = {src_path}')
logging.info(f'dist_path = {dist_path}')
logging.info(f'operation = {operation}')
logging.info(100*'*')

print()
print()
print(100* '*')
print()
print('      created by Tarek Meftah ')
print('      watch folder for changes and copy or move files to another distination folder.')
print()
print(100* '*')
print()
print()
print(f'     +    watching folder {src_path} for change ')
while True:
    try:
        file_list = glob.glob(src_path) # get all files in scr_path folder

        for file in file_list:
            file_datetime = datetime.fromtimestamp(os.path.getctime(file))
            filename = os.path.basename(file)    
            now = datetime.now()
            diff = now - file_datetime

            if diff.seconds > timeinterval :

                if operation == "copy":
                    file_exist = os.path.isfile(os.path.join(dist_path,filename))                    
                    if  file_exist:
                        next
                    else:
                        try:
                            shutil.copy(file,os.path.join(dist_path,filename))
                            logging.info(f'file {filename} is copied successfully')                                                       
                        except shutil.Error :
                            logging.error(f'copy file {filename} failed')
                            next

                if operation == "move":
                    try:
                        shutil.move(file,os.path.join(dist_path,filename))
                        logging.info(f'file {filename} is moved successfully')
                    except shutil.Error:
                        logging.error(f'moving file {filename} failed')
                        next

        time.sleep(1)
    except KeyboardInterrupt:    
        confirm = input('Enter "yes" to cancel or "no" to keep running [yes/no]:').strip().lower()
        if confirm == 'yes' or confirm == "y":            
            logging.info(47* '*'+' Exit '+47* '*' +'\n')            
            break

        elif confirm == 'no' or confirm == "n":
            print("     + Keep runnning!")
            continue
        else:
            print ('    + Sorry, no valid answer...')
            continue
    except Exception as e:
         logging.error(f'error: {e.message} ')

Hopefully you can use this script on your daily work. I used pyinstaller to generate an executable that i can use it where i want and not having to install python.