Post in python. What I did wrong? :(

August 3, 2022

I have wrote this code for raspberry pi pico W
using those libraries:

import rp2
import network
import ubinascii
import machine
import urequests as requests
import time
import socket

The code :

headers = {"content-type: application/json"}
payload = {"DeviceID": 1,
           "temp":1,
           "humidity":0,
           "data1":0}
print(payload)
print("Executing POST")
response = requests.post(url2, headers=headers, data=payload)
print("sent (" + str(response.status_code) + "), status = " + str(wlan.status()) )
print("POST execution succes")
response.close()

I successfully made a get request.
And I got lots of errors trying POST in Thonny compiler. I have tried to change a lot of things and this is the final form that doesn’t work :).

>Solution :

Okay so you pointed out the error was:

TypeError: 'set' object isn't subscriptable

When looking to see where you defined a set, I saw this set definition:

headers = {"content-type: application/json"}

You surely meant to define it as a dictionary – you’re missing a couple of quotes:

headers = {"content-type": "application/json"}

Both sets and dicts are defined via curly braces; you were defining a set because you weren’t using dict notation, which requires the : to not be contained within a string, like you had.