Write a Unix (Linux) find-like command (myFind) in Python3 where the function will return the full paths of all the files containing the specified substring at the command line by recursively searching all the files and subdirectories starting from the specified directory. At the end of the command, it also returns the total file size of those files found in bytes . The total file size should be the summation of the file sizes of the regular files only.

import os, sys, stat

from stat import *

command = 'find ' + sys.argv[1] + ' -name *' + sys.argv[2] + '*'

print(command)

totalFiles = os.popen(command).read()

totalFiles = totalFiles.split()

totalSize = 0

for line in totalFiles:

  statinfo = os.stat(line)

  if stat.S_ISREG(statinfo.st_mode):

      print(line, statinfo.st_size, 'bytes')

      totalSize += statinfo.st_size

  else:

      print(line, '...')

print('Total file size:', totalSize, 'bytes')

Explanation: