How to set the net proxy?

[memorycancel]

How to set the net proxy?
Network error, As the title. Many thanks!

okx exchange

Traceback (most recent call last):
  File "/home/tommy/codes/passivbot/procedures.py", line 206, in add_market_specific_settings
    market_specific_settings = fetch_market_specific_settings(config)
  File "/home/tommy/codes/passivbot/procedures.py", line 760, in fetch_market_specific_settings
    markets = cc.fetch_markets()
  File "/home/tommy/.local/lib/python3.10/site-packages/ccxt/okx.py", line 1293, in fetch_markets
    promises.append(self.fetch_markets_by_type(types[i], params))
  File "/home/tommy/.local/lib/python3.10/site-packages/ccxt/okx.py", line 1458, in fetch_markets_by_type
    response = self.publicGetPublicInstruments(self.extend(request, params))
  File "/home/tommy/.local/lib/python3.10/site-packages/ccxt/base/types.py", line 34, in unbound_method
    return _self.request(self.path, self.api, self.method, params, config=self.config)
  File "/home/tommy/.local/lib/python3.10/site-packages/ccxt/base/exchange.py", line 3318, in request
    return self.fetch2(path, api, method, params, headers, body, config)
  File "/home/tommy/.local/lib/python3.10/site-packages/ccxt/base/exchange.py", line 3315, in fetch2
    return self.fetch(request['url'], request['method'], request['headers'], request['body'])
  File "/home/tommy/.local/lib/python3.10/site-packages/ccxt/base/exchange.py", line 643, in fetch
    raise NetworkError(details) from e
ccxt.base.errors.NetworkError: okx GET https://www.okx.com/api/v5/public/instruments?instType=SPOT