merge_list.py

import os
import json 

files = ["gigaspeech_prompt_xs_large_v3_wer_0-20000.json", "gigaspeech_prompt_xs_large_v3_wer_20000-99999999.json"]
output_file = "gigaspeech_prompt_xs_large_v3_wer.json"
final_output = []
for file in files: 
	with open(file) as f:
		data = json.load(f)
	final_output.extend(data)

with open(output_file, "w") as f: 
	json.dump(final_output, f)