Handle Json Key Case

When working with JSON data from different sources, you might see inconsistent key names, like:

{
  "tTien": 1000,
  "ttien": 1000,
  "tthue": 100,
  "tThue": 100,
  "TThue": 100
}

Different places use different names, which is annoying. Using try/except, if/else, or match/case makes the code messy and error-prone.

Simple solution: Before processing, convert all keys to lowercase. It’s fast and easy to maintain: data = {k.lower(): v for k, v in original_data.items()} Now you can just use data['ttien'], data['tthue'] without writing long code.

Bonus: If keys have spaces or dashes (-, _), you can normalize further:

import re

def normalize_key(k):
    return re.sub(r'\W+', '', k).lower()

data = {normalize_key(k): v for k, v in original_data.items()}