code: def main(args):
      args = parse_args(args)
      package_names = set()
  
      class PyPIHTMLParser(
          HTMLParser
      ):  # pylint: disable=abstract-method
          def handle_starttag(self, tag, attrs):
              if tag == "a":
                  for name, value in attrs:
                      if name == "href":
                          # Packages are represented in the PyPI simple index
                          # as anchors with href attributes. These are the only
                          # elements we care about
                          package_name = posixpath.basename(
                              value.rstrip("/")
                          )
                          package_names.add(package_name)
  
      index_url = "https://pypi.org/simple/"
      raw_index_html = requests.get(index_url).text
  
      parser = PyPIHTMLParser()
      parser.feed(raw_index_html)
  
      formatted_package_index = {
          "index_date": datetime.today().strftime("%Y-%m-%d"),
          "package_names": list(package_names),
      }
  
      with open(args.path, "w") as f:
          json.dump(formatted_package_index, f, separators=(",", ":"))
  
file_path: mlflow/dev/update_pypi_package_index.py
imports: import argparse
  import json
  import posixpath
  import sys
  from datetime import datetime
  from html.parser import HTMLParser
  import requests
label_desc: Use image node_id 2 for calling a global function with example usage: main(args) without return types