An error occurs when passing `datetime.datetime` to `gr.DateTime`

[hysts]

Describe the bug

datetime.datetime is allowed as the value of gr.DateTime according to the docstring, but an error occurs when passing it.

Looks like postprocess() is called when calling super().__init__(), so this https://github.com/gradio-app/gradio/blob/ac132e3cbc8dbc7bec3d607d52bef347e90feb41/gradio/components/datetime.py#L77-L80 should come before https://github.com/gradio-app/gradio/blob/ac132e3cbc8dbc7bec3d607d52bef347e90feb41/gradio/components/datetime.py#L63-L76

Have you searched existing issues? 🔎

• [X] I have searched and found no existing issues

Reproduction

import datetime

import gradio as gr

with gr.Blocks() as demo:
    dt = gr.DateTime(
        type="datetime",
        value=datetime.datetime.now(tz=datetime.timezone.utc),
    )
demo.queue().launch()

Screenshot

No response

Logs

Traceback (most recent call last):
  File "/home/ubuntu/repos/temp/2024-07-24-datetime/app.py", line 6, in <module>
    dt = gr.DateTime(
  File "/home/ubuntu/.virtualenvs/py31014/lib/python3.10/site-packages/gradio/component_meta.py", line 163, in wrapper
    return fn(self, **kwargs)
  File "/home/ubuntu/.virtualenvs/py31014/lib/python3.10/site-packages/gradio/components/datetime.py", line 63, in __init__
    super().__init__(
  File "/home/ubuntu/.virtualenvs/py31014/lib/python3.10/site-packages/gradio/component_meta.py", line 163, in wrapper
    return fn(self, **kwargs)
  File "/home/ubuntu/.virtualenvs/py31014/lib/python3.10/site-packages/gradio/components/base.py", line 211, in __init__
    initial_value = self.postprocess(initial_value)
  File "/home/ubuntu/.virtualenvs/py31014/lib/python3.10/site-packages/gradio/components/datetime.py", line 112, in postprocess
    return datetime.strftime(value, self.time_format)
AttributeError: 'DateTime' object has no attribute 'time_format'

System Info

Gradio Environment Information:
------------------------------
Operating System: Linux
gradio version: 4.39.0
gradio_client version: 1.1.1

------------------------------------------------
gradio dependencies in your environment:

aiofiles: 22.1.0
anyio: 3.7.1
fastapi: 0.111.0
ffmpy: 0.3.2
gradio-client==1.1.1 is not installed.
httpx: 0.27.0
huggingface-hub: 0.24.1
importlib-resources: 6.4.0
jinja2: 3.1.4
markupsafe: 2.1.5
matplotlib: 3.9.1
numpy: 1.26.4
orjson: 3.10.6
packaging: 24.1
pandas: 2.2.2
pillow: 10.4.0
pydantic: 2.8.2
pydub: 0.25.1
python-multipart: 0.0.9
pyyaml: 6.0.1
ruff: 0.5.1
semantic-version: 2.10.0
tomlkit==0.12.0 is not installed.
typer: 0.12.3
typing-extensions: 4.12.2
urllib3: 2.2.2
uvicorn: 0.30.1
authlib; extra == 'oauth' is not installed.
itsdangerous; extra == 'oauth' is not installed.

gradio_client dependencies in your environment:

fsspec: 2024.5.0
httpx: 0.27.0
huggingface-hub: 0.24.1
packaging: 24.1
typing-extensions: 4.12.2
websockets: 11.0.3

Severity

I can work around it

[zwldarren]

I think you should use strftime():

datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")