PATCH update request from python requests library won't work

I am trying to update a record’s attachments field.

I am doing this successfully with curl, and also I have python code that successfully pulls records from the table; however when I add code to that which tries the PATCH, I get a “Could not parse request body” 422 response.

Below is the code.

Thanks!

import requests
import datetime
import json

auth_token=‘keyXXXXmJVG’
hed = {‘Authorization’: 'Bearer ’ + auth_token, ‘Content-Type’: ‘application/json’}

url = ‘https://api.airtable.com/v0/applXXXXmLfek/Table%202/recthrgH5KVMEMglc

print(“GET’ing records…”)

# THIS REQUEST WORKS:
response = requests.get(url, headers=hed)
print(response.json())

r2 = { ‘fields’: { ‘mytext’: ‘success’}}

print(“PATCH request…”)

# THIS REQUEST FAILS WITH 'Could not parse request body’
presp = requests.patch(url, headers=hed, data=r2)
print(presp.text, presp)

Found the solution: requests.patch(url, headers=hed, json=r2)