[App] Rename gradio.py gradio_server.py

[akihironitta]

What does this PR do?

Fixes the error from running ServeGradio example on the cloud:

AttributeError: module 'gradio' has no attribute 'Interface'

full code and log on the cloud

# !pip install gradio --no-cache-dir --upgrade
import lightning as L
import gradio as gr

class LitGradio(L.app.components.ServeGradio):

    inputs = gr.inputs.Textbox(default='lightning', label='name input')
    outputs = gr.outputs.Textbox(label='output')
    examples = [["hello lightning"]]

    def predict(self, input_text):
        return self.model(input_text)

    def build_model(self):
        fake_model = lambda x: f"hello {x}"
        return fake_model

class RootFlow(L.LightningFlow):
    def __init__(self):
        super().__init__()
        self.lit_gradio = LitGradio()

    def run(self):
        self.lit_gradio.run()

    def configure_layout(self):
        return [{"name": "home", "content": self.lit_gradio}]

app = L.LightningApp(RootFlow())

created virtual environment CPython3.8.10.final.0-64 in 2000ms
  creator CPython3Posix(dest=/content/venv, clear=False, no_vcs_ignore=False, global=True)
  seeder FromAppData(download=False, pip=bundle, setuptools=bundle, wheel=bundle, via=copy, app_data_dir=/home/zeus/.local/share/virtualenv)
    added seed packages: pip==22.3.1, setuptools==65.6.3, wheel==0.38.4
  activators BashActivator,CShellActivator,FishActivator,NushellActivator,PowerShellActivator,PythonActivator
dependency cache not found
no dependency file given
no setup.py
lightning already installed
lightning-launcher already installed
+ echo Done
Done
 * Starting OpenBSD Secure Shell server sshd
   ...done.
/content/venv/lib/python3.8/site-packages/pkg_resources/__init__.py:123: PkgResourcesDeprecationWarning: 0.23ubuntu1 is an invalid version and will not be supported in a future release
  warnings.warn(
INFO: Running app setup command: pip install gradio --no-cache-dir --upgrade
Collecting gradio
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Successfully built ffmpy
Installing collected packages: pytz, pydub, ffmpy, uc-micro-py, toolz, pyrsistent, pyparsing, pycryptodome, pkgutil-resolve-name, pillow, mdurl, kiwisolver, fonttools, entrypoints, cycler, contourpy, pandas, matplotlib, markdown-it-py, linkify-it-py, jsonschema, mdit-py-plugins, altair, gradio
Successfully installed altair-4.2.0 contourpy-1.0.6 cycler-0.11.0 entrypoints-0.4 ffmpy-0.3.0 fonttools-4.38.0 gradio-3.15.0 jsonschema-4.17.3 kiwisolver-1.4.4 linkify-it-py-1.0.3 markdown-it-py-2.1.0 matplotlib-3.6.2 mdit-py-plugins-0.3.3 mdurl-0.1.2 pandas-1.5.2 pillow-9.3.0 pkgutil-resolve-name-1.3.10 pycryptodome-3.16.0 pydub-0.25.1 pyparsing-3.0.9 pyrsistent-0.19.2 pytz-2022.7 toolz-0.12.0 uc-micro-py-1.0.1
/content/venv/lib/python3.8/site-packages/gradio/inputs.py:26: UserWarning: Usage of gradio.inputs is deprecated, and will not be supported in the future, please import your component from gradio.components
  warnings.warn(
/content/venv/lib/python3.8/site-packages/gradio/deprecation.py:40: UserWarning: `optional` parameter is deprecated, and it has no effect
  warnings.warn(value)
/content/venv/lib/python3.8/site-packages/gradio/deprecation.py:40: UserWarning: `numeric` parameter is deprecated, and it has no effect
  warnings.warn(value)
/content/venv/lib/python3.8/site-packages/gradio/outputs.py:21: UserWarning: Usage of gradio.outputs is deprecated, and will not be supported in the future, please import your components from gradio.components
  warnings.warn(
Traceback (most recent call last):
    sys.exit(main())
  File "/home/zeus/.local/lib/python3.8/site-packages/click/core.py", line 1130, in __call__
    return self.main(*args, **kwargs)
  File "/home/zeus/.local/lib/python3.8/site-packages/click/core.py", line 1055, in main
    rv = self.invoke(ctx)
  File "/home/zeus/.local/lib/python3.8/site-packages/click/core.py", line 1657, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/zeus/.local/lib/python3.8/site-packages/click/core.py", line 1657, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/zeus/.local/lib/python3.8/site-packages/click/core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/zeus/.local/lib/python3.8/site-packages/click/core.py", line 760, in invoke
    return __callback(*args, **kwargs)
  File "/home/zeus/.local/lib/python3.8/site-packages/lightning_launcher/cli/__main__.py", line 87, in run_work
    run_lightning_work(
  File "/home/zeus/.local/lib/python3.8/site-packages/lightning_launcher/utils.py", line 50, in wrapper
    res = func(*args, **kwargs)
  File "/home/zeus/.local/lib/python3.8/site-packages/lightning_launcher/utils.py", line 75, in wrapper
    res = func(*args, **kwargs)
  File "/home/zeus/.local/lib/python3.8/site-packages/lightning_launcher/launcher.py", line 181, in run_lightning_work
    WorkRunner(
  File "/home/zeus/.local/lib/python3.8/site-packages/lightning/app/utilities/proxies.py", line 419, in __call__
    raise e
  File "/home/zeus/.local/lib/python3.8/site-packages/lightning/app/utilities/proxies.py", line 402, in __call__
    self.run_once()
  File "/home/zeus/.local/lib/python3.8/site-packages/lightning/app/utilities/proxies.py", line 550, in run_once
    self.work.on_exception(e)
  File "/home/zeus/.local/lib/python3.8/site-packages/lightning/app/core/work.py", line 612, in on_exception
    raise exception
  File "/home/zeus/.local/lib/python3.8/site-packages/lightning/app/utilities/proxies.py", line 515, in run_once
    ret = self.run_executor_cls(self.work, work_run, self.delta_queue)(*args, **kwargs)
  File "/home/zeus/.local/lib/python3.8/site-packages/lightning/app/utilities/proxies.py", line 351, in __call__
    return self.work_run(*args, **kwargs)
  File "/home/zeus/.local/lib/python3.8/site-packages/lightning/app/components/serve/gradio.py", line 68, in run
    gradio.Interface(
AttributeError: module 'gradio' has no attribute 'Interface'

Does your PR introduce any breaking changes? If yes, please list them.

Changes one of the import statements as follows:

import lightning.app.components import ServeGradio
import lightning.app.components.serve import ServeGradio
-import lightning.app.components.serve.gradio import ServeGradio
+import lightning.app.components.serve.gradio_server import ServeGradio

Before submitting

• Was this discussed/approved via a GitHub issue? (not for typos and docs)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure your PR does only one thing, instead of bundling different changes together?
• Did you make sure to update the documentation with your changes? (if necessary)
• Did you write any new necessary tests? (not for typos and docs)
• Did you verify new and existing tests pass locally with your changes?
• Did you list all the breaking changes introduced by this pull request?
• Did you update the CHANGELOG? (not for typos, docs, test updates, or minor internal changes/refactors)

PR review

Anyone in the community is welcome to review the PR.
Before you start reviewing, make sure you have read the review guidelines. In short, see the following bullet-list:

• Is this pull request ready for review? (if not, please submit in draft mode)
• Check that all items from Before submitting are resolved
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Additional info

For people who have access to app info: https://lightning.ai/akihiro/apps/01gn6awsyesn0t9p84twcfb0r4

cc @Borda

[github-actions]

⚡ Required checks status: All passing 🟢

Groups summary

🟢 lightning_app: Tests workflow

Check ID	Status
app-pytest (macOS-11, app, 3.8, latest)	success	✅
app-pytest (macOS-11, app, 3.8, oldest)	success	✅
app-pytest (macOS-11, lightning, 3.9, latest)	success	✅
app-pytest (ubuntu-20.04, app, 3.8, latest)	success	✅
app-pytest (ubuntu-20.04, app, 3.8, oldest)	success	✅
app-pytest (ubuntu-20.04, lightning, 3.9, latest)	success	✅
app-pytest (windows-2022, app, 3.8, latest)	success	✅
app-pytest (windows-2022, app, 3.8, oldest)	success	✅
app-pytest (windows-2022, lightning, 3.8, latest)	success	✅

These checks are required after the changes to src/lightning_app/components/__init__.py, src/lightning_app/components/serve/__init__.py, src/lightning_app/components/serve/gradio_server.py.

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Check ID	Status
app-examples (macOS-11, app, 3.9, latest)	success	✅
app-examples (macOS-11, app, 3.9, oldest)	success	✅
app-examples (macOS-11, lightning, 3.9, latest)	success	✅
app-examples (ubuntu-20.04, app, 3.9, latest)	success	✅
app-examples (ubuntu-20.04, app, 3.9, oldest)	success	✅
app-examples (ubuntu-20.04, lightning, 3.9, latest)	success	✅
app-examples (windows-2022, app, 3.9, latest)	success	✅
app-examples (windows-2022, app, 3.9, oldest)	success	✅
app-examples (windows-2022, lightning, 3.9, latest)	success	✅

These checks are required after the changes to src/lightning_app/components/__init__.py, src/lightning_app/components/serve/__init__.py, src/lightning_app/components/serve/gradio_server.py, tests/integrations_app/public/test_gradio.py.

🟢 lightning_app: Azure

Check ID	Status
App.cloud-e2e	success	✅

These checks are required after the changes to src/lightning_app/components/__init__.py, src/lightning_app/components/serve/__init__.py, src/lightning_app/components/serve/gradio_server.py, tests/integrations_app/public/test_gradio.py.

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make-doctest (app)	success	✅
make-html (app)	success	✅

These checks are required after the changes to src/lightning_app/components/__init__.py, src/lightning_app/components/serve/__init__.py, src/lightning_app/components/serve/gradio_server.py, docs/source-app/api_reference/components.rst, docs/source-app/api_references.rst.

🟢 mypy

Check ID	Status
mypy	success	✅

These checks are required after the changes to src/lightning_app/components/__init__.py, src/lightning_app/components/serve/__init__.py, src/lightning_app/components/serve/gradio_server.py, pyproject.toml.

🟢 install

Check ID	Status
install-pkg (ubuntu-22.04, app, 3.7)	success	✅
install-pkg (ubuntu-22.04, app, 3.10)	success	✅
install-pkg (ubuntu-22.04, fabric, 3.7)	success	✅
install-pkg (ubuntu-22.04, fabric, 3.10)	success	✅
install-pkg (ubuntu-22.04, pytorch, 3.7)	success	✅
install-pkg (ubuntu-22.04, pytorch, 3.10)	success	✅
install-pkg (ubuntu-22.04, lightning, 3.7)	success	✅
install-pkg (ubuntu-22.04, lightning, 3.10)	success	✅
install-pkg (ubuntu-22.04, notset, 3.7)	success	✅
install-pkg (ubuntu-22.04, notset, 3.10)	success	✅
install-pkg (macOS-12, app, 3.7)	success	✅
install-pkg (macOS-12, app, 3.10)	success	✅
install-pkg (macOS-12, fabric, 3.7)	success	✅
install-pkg (macOS-12, fabric, 3.10)	success	✅
install-pkg (macOS-12, pytorch, 3.7)	success	✅
install-pkg (macOS-12, pytorch, 3.10)	success	✅
install-pkg (macOS-12, lightning, 3.7)	success	✅
install-pkg (macOS-12, lightning, 3.10)	success	✅
install-pkg (macOS-12, notset, 3.7)	success	✅
install-pkg (macOS-12, notset, 3.10)	success	✅
install-pkg (windows-2022, app, 3.7)	success	✅
install-pkg (windows-2022, app, 3.10)	success	✅
install-pkg (windows-2022, fabric, 3.7)	success	✅
install-pkg (windows-2022, fabric, 3.10)	success	✅
install-pkg (windows-2022, pytorch, 3.7)	success	✅
install-pkg (windows-2022, pytorch, 3.10)	success	✅
install-pkg (windows-2022, lightning, 3.7)	success	✅
install-pkg (windows-2022, lightning, 3.10)	success	✅
install-pkg (windows-2022, notset, 3.7)	success	✅
install-pkg (windows-2022, notset, 3.10)	success	✅

These checks are required after the changes to src/lightning_app/components/__init__.py, src/lightning_app/components/serve/__init__.py, src/lightning_app/components/serve/gradio_server.py.

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Thank you for your contribution! 💜

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