code: def _get_uploaded_versions_warehouse(project_name, index_url, requests_verify=True):
      
      url = '/'.join((index_url, project_name, 'json'))
      response = requests.get(url, verify=requests_verify)
      if response.status_code == 200:
          return response.json()['releases'].keys()
      return None
docs: Query the pypi index at index_url using warehouse api to find all of the "releases"