How to place new futures order in Python, C#?

I’ve trided to place new futures order in test net.

But i failed, is there any sample code to place future limit order in python/C# language?

Thanks

Here is My code

fp = "https://testnet.binancefuture.com"

params = {'symbol':'BTCUSDT','side':'BUY','type':'LIMIT','timeInForce':'GTC','quantity':'1','price':'41000','recv_window':'5000'}
    
query_string = urlencode(params).encode()

m = hashlib.sha256()
m.update(query_string)
query_hash = m.hexdigest()

payload = {
    'access_key': public_key,
    'nonce': str(uuid.uuid4()),
    'query_hash': query_hash,
    'query_hash_alg': 'SHA256'
    }

jwt_token = jwt.encode(payload, sc_key)
authorize_token = 'Bearer {}'.format(jwt_token)
headers = {"Authorization": authorize_token}

res = requests.post(fp + "/v1/order", params=params, headers=headers)

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