Sentiment Analysis

#| '!! shinylive warning !!': |
#|   shinylive does not work in self-contained HTML documents.
#|   Please set `embed-resources: false` in your metadata.
#| standalone: true
#| viewerHeight: 640
#| components: [editor, viewer]
from shiny import reactive
from shiny.express import input, render, ui

analysis_result = reactive.value("Run the analysis to see the results")

ui.page_opts(fillable=True)

ui.tags.style(
    """
    .card { 
        max-width: 400px; width: 100%; 
        margin-left: auto; margin-right: auto; 
        height: 45%;
    }
    """
)


with ui.card():  
    ui.card_header("Sentiment Analysis")

    ui.input_text_area("message", "What's the message you would like to run the sentiment analysis on?", value="")

    @reactive.effect
    @reactive.event(input.analyse)
    async def perform_the_analysis():
        import micropip
        await micropip.install("transformers_js_py")
        from transformers_js_py import import_transformers_js
        transformers = await import_transformers_js()
        pipeline = transformers.pipeline
        pipe = await pipeline('sentiment-analysis')
        out = await pipe(input.message())
        res = "We are " + str(round(out[0]['score'] * 100, 2)) + "% confident that the sentiment is " + out[0]['label']
        analysis_result.set(res)


    ui.input_action_button("analyse", "Run the analysis")

with ui.card():
    ui.card_header("Result")

    @render.text
    def value():
        return str(analysis_result.get())