Using python lib for download to make it platform agnostic

Author: apbose

py/torch_tensorrt/dynamo/utils.py

@@ -7,6 +7,7 @@
 import shutil
 import subprocess
 import sys
+import urllib.request
 import warnings
 from dataclasses import fields, replace
 from enum import Enum
@@ -827,10 +828,10 @@ def download_plugin_lib_path(py_version: str, platform: str) -> str:
     base_url = "https://pypi.nvidia.com/tensorrt-llm/"
     file_name = f"tensorrt_llm-0.18.0-{py_version}-{py_version}-{platform}.whl"
     download_url = base_url + file_name
-    cmd = ["wget", download_url]
     if not (os.path.exists(file_name)):
         try:
-            subprocess.run(cmd, check=True)
+            logger.debug(f"Downloading {download_url} ...")
+            urllib.request.urlretrieve(download_url, file_name)
             logger.debug("Download succeeded and TRT-LLM wheel is now present")
         except subprocess.CalledProcessError as e:
             logger.error(