希望使用cURL发送Python API请求

Question

I am looking to send a POST request using Python to the OANDA API to open an order. They do not have a Python wrapper and use cURL, so I have had to try and convert from cURL to Python. I have done so using https://curl.trillworks.com/ -- but converting this next one does not work.

You can view the OANDA API documentation here, under the first Green POST tab - http://developer.oanda.com/rest-live-v20/order-ep/

Here is what I am working with. This first block specifies the order details. In this case, a market order in the EUR_USD instrument with a quantity of 100 units and a time in force equalling "fill or kill" :

body=$(cat << EOF
{
  "order": {
    "units": "100",
    "instrument": "EUR_USD",
    "timeInForce": "FOK",
    "type": "MARKET",
    "positionFill": "DEFAULT"
  }
}
EOF
)

curl \
  -X POST \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer SECRET TOKEN" \
  -d "$body" \
  "https://api-fxpractice.oanda.com/v3/accounts/{ACCOUNT-NUMBER}/orders"

Converted into Python:

import requests

headers = {
    'Content-Type': 'application/json',
    'Authorization': 'Bearer SECRET TOKEN',
}

data = '$body'

response = requests.post('https://api-fxpractice.oanda.com/v3/accounts/{ACCOUNT-NUMBER}/orders', headers=headers, data=data)

As you can see, I believe there is a formatting error somewhere in the "body=$" portion, but I am not entirely sure. I simply get a 400 error, "invalid values."

Answer 1

If you're sending data in JSON format, you should pass them into json argument instead of data ( explanation , method ).

import requests

headers = {
    # 'Content-Type': 'application/json', # will be set automatically
    'Authorization': 'Bearer SECRET TOKEN',
}

body = {
  "order": {
    "units": "100",
    "instrument": "EUR_USD",
    "timeInForce": "FOK",
    "type": "MARKET",
    "positionFill": "DEFAULT"
  }
}

response = requests.post('https://api-fxpractice.oanda.com/v3/accounts/{ACCOUNT-NUMBER}/orders', 
                         headers=headers, json=body)