如何处理json密钥错误

import json

data = '{"name": "Alice"}'
json_data = json.loads(data)

# 尝试访问不存在的键
try:
    age = json_data['age']
except KeyError as e:
    print(f"KeyError: {e}")
    age = None

age = json_data.get('age', None)

import json

data = '{"name": "Alice"}'
json_data = json.loads(data)

# 尝试将字符串转换为整数
try:
    age = int(json_data['name'])
except ValueError as e:
    print(f"ValueError: {e}")
    age = None

if 'name' in json_data and isinstance(json_data['name'], str):
    try:
        age = int(json_data['name'])
    except ValueError:
        age = None