text: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  #
  # Copyright (c) 2012-2021 Snowflake Computing Inc. All right reserved.
  #
  
  import os
  
  
  def set_proxies(proxy_host, proxy_port, proxy_user=None, proxy_password=None):
      """Sets proxy dict for requests."""
      PREFIX_HTTP = "http://"
      PREFIX_HTTPS = "https://"
      proxies = None
      if proxy_host and proxy_port:
          if proxy_host.startswith(PREFIX_HTTP):
              proxy_host = proxy_host[len(PREFIX_HTTP) :]
          elif proxy_host.startswith(PREFIX_HTTPS):
              proxy_host = proxy_host[len(PREFIX_HTTPS) :]
          if proxy_user or proxy_password:
              proxy_auth = "{proxy_user}:{proxy_password}@".format(
                  proxy_user=proxy_user if proxy_user is not None else "",
                  proxy_password=proxy_password if proxy_password is not None else "",
              )
          else:
              proxy_auth = ""
          proxies = {
              "http": "http://{proxy_auth}{proxy_host}:{proxy_port}".format(
                  proxy_host=proxy_host,
                  proxy_port=str(proxy_port),
                  proxy_auth=proxy_auth,
              ),
              "https": "http://{proxy_auth}{proxy_host}:{proxy_port}".format(
                  proxy_host=proxy_host,
                  proxy_port=str(proxy_port),
                  proxy_auth=proxy_auth,
              ),
          }
          os.environ["HTTP_PROXY"] = proxies["http"]
          os.environ["HTTPS_PROXY"] = proxies["https"]
      return proxies
  