code: def gen_locustfile(testcase_file_path):
      
      locustfile_path = 'locustfile.py'
      template_path = os.path.join(
          os.path.dirname(os.path.realpath(__file__)),
          "templates",
          "locustfile_template"
      )
  
      with io.open(template_path, encoding='utf-8') as template:
          with io.open(locustfile_path, 'w', encoding='utf-8') as locustfile:
              template_content = template.read()
              template_content = template_content.replace("$TESTCASE_FILE", testcase_file_path)
              locustfile.write(template_content)
  
      return locustfile_path
docs: generate locustfile from template.