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    "# importing os module \n",
    "import os \n",
    "  \n",
    "# Function to rename multiple files \n",
    "def main(): \n",
    "    i = 0\n",
    "      \n",
    "    for filename in os.listdir(\"train-img\"): \n",
    "        dst =\"Train_\" + str(i) + \".jpg\"\n",
    "        src = 'train-img/' + filename \n",
    "        dst = 'train-img/' + dst\n",
    "          \n",
    "        # rename() function will \n",
    "        # rename all the files \n",
    "        os.rename(src, dst) \n",
    "        i += 1\n",
    "    print(\"Done\")\n",
    "# Driver Code \n",
    "if __name__ == '__main__': \n",
    "      \n",
    "    # Calling main() function \n",
    "    main() "
   ]
  }
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