How to properly use python requests post for sending data? or What's the best way to handle a python

Hey! Here’s a clear example with headers and params:

```python
import requests

url = 'https://example.com/api'
headers = {'Content-Type': 'application/json'}
params = {'param1': 'value1'}
data = {'key': 'value'}

response = requests.post(url, json=data, headers=headers, params=params)
print(response.json())
```

400 errors often mean the server rejects your request. Check the API docs for required fields. For debugging, use `response.content` to see raw output.