import json
from io import StringIO
d = [{'name': '홍길동', 'birth': '0525', 'age': 30},
     {'name': '홍길동', 'birth': '0525', 'age': 30},
     ]
json_data = json.dumps(d, ensure_ascii=False)
print(json_data)
print(d)

io = StringIO(json_data)
print(io)
my = json.load(io)
print(my)

print(type(my))
print('length', len(my), sep=':')