import json, uuid
from datetime import datetime

def safe_float(v, d=0.0):
    try:
        return d if v in (None, "") else float(v)
    except Exception:
        return d

def safe_int(v, d=0):
    try:
        return d if v in (None, "") else int(v)
    except Exception:
        return d

def dumps(x):
    return json.dumps(x, default=str)

def now_iso():
    return datetime.utcnow().isoformat()

def new_id(prefix):
    return f"{prefix}_{uuid.uuid4().hex[:16]}"