Finance Trial Balance Generator

import json, pandas as pd
from collections import defaultdict

GL_ENTRIES = "gl_entries.json"

def generate_trial_balance():
    with open(GL_ENTRIES) as f:
        entries = json.load(f)
    agg = defaultdict(lambda: {"debit": 0, "credit": 0})
    for e in entries:
        agg[e["account"]]["debit"] += e.get("debit", 0)
        agg[e["account"]]["credit"] += e.get("credit", 0)
    for acc in agg:
        agg[acc]["balance"] = agg[acc]["debit"] - agg[acc]["credit"]
    return agg

def check_balance(tb):
    total_debit = sum(v["debit"] for v in tb.values())
    total_credit = sum(v["credit"] for v in tb.values())
    return {"balanced": total_debit == total_credit, "variance": total_debit - total_credit}

tb = generate_trial_balance()
print(json.dumps(tb, indent=2))