More accurate dynamic class creation

import textwrap

class Example:
    attr = 1

    def method(self):
        return "method"

name = "Example"
bases = ()
namespace = type.__prepare__(name, bases)  # >>> {}, default is dict()
# namespace["attr"] = 1
# namespace["method"] = lambda self: "method"

body = textwrap.dedent(
    """\
    attr = 1

    def method(self):
        return "method"
    """
)

exec(body, globals(), namespace)
Example = type(name, bases, namespace)  # type: ignore

print(f"{Example.__class__=}")     # <class 'type'>
print(f"{Example().attr=}")        # 1
print(f"{Example().method()=}")    # 'method'

assert isinstance(Example, type)
assert isinstance(Example(), Example)