app.py

import gradio as gr
from gr_nlp_toolkit import Pipeline

# Author: Lefteris Loukas
# Date: August 2024
# Description: A Gradio interface for the Grεεk NLP Toolkit, which includes Greeklish to Greek conversion, dependency parsing, part-of-speech tagging, and named entity recognition.
# Point-of-Contact: http://nlp.cs.aueb.gr/

# Initialize Pipelines
nlp_pos_ner_dp_with_g2g = Pipeline("pos,ner,dp,g2g")

G2G_PLACEHOLDER = "e.g., H thessaloniki einai mia poli sti boreia ellada"
NER_PLACEHOLDER = "e.g., Η Αργεντινή κέρδισε το Παγκόσμιο Κύπελλο το 2022"
POS_PLACEHOLDER = "e.g., Μου αρέσει να διαβάζω τα post του Andrew Ng στο Twitter."
DP_PLACEHOLDER = "e.g., Προτιμώ την πρωινή πτήση από την Αθήνα στη Θεσσαλονίκη."


def greeklish_to_greek(text):
    if not text:
        text = G2G_PLACEHOLDER[5:]

    doc = nlp_pos_ner_dp_with_g2g(text)
    return " ".join([token.text for token in doc.tokens])


def process_text(text, task):
    doc = nlp_pos_ner_dp_with_g2g(text)
    task_mapping = {
        "dp": lambda token: f"Text: {token.text}, Head: {token.head}, Deprel: {token.deprel}",
        "pos": lambda token: f"Text: {token.text}, UPOS: {token.upos}, Feats: {token.feats}",
        "ner": lambda token: f"Text: {token.text}, NER: {token.ner}",
    }
    return "\n".join([task_mapping[task](token) for token in doc.tokens])


def dependency_parsing(text):
    if not text:
        text = DP_PLACEHOLDER[5:]
    return process_text(text, "dp")


def pos_tagging(text):
    if not text:
        text = POS_PLACEHOLDER[5:]
    return process_text(text, "pos")


def named_entity_recognition(text):
    if not text:
        text = NER_PLACEHOLDER[5:]

    return process_text(text, "ner")


# Define the Gradio interface
def create_demo():
    theme = gr.themes.Soft()
    with gr.Blocks(theme=theme) as demo:
        gr.Markdown(
            """
        # The Grεεk NLP Toolkit 🇬🇷
        This is a demonstration space for our open-source Python toolkit (`gr-nlp-toolkit`), which supports state-of-the-art natural language processing capabilities in Greek. 
        
        ## Key Features:
        - Greeklish to Greek Conversion (G2G)
        - Dependency Parsing (DP)
        - Part-of-Speech (POS) Tagging
        - Named Entity Recognition (NER)
        """
        )

        with gr.Tab("Greeklish to Greek"):
            g2g_input = gr.Textbox(
                label="Enter Greeklish text",
                placeholder=G2G_PLACEHOLDER,
            )
            g2g_output = gr.Textbox(label="Greek text")
            g2g_button = gr.Button("Submit")
            g2g_button.click(greeklish_to_greek, inputs=g2g_input, outputs=g2g_output)

        with gr.Tab("Dependency Parsing"):
            dp_input = gr.Textbox(
                label="Enter text",
                placeholder=DP_PLACEHOLDER,
            )
            dp_output = gr.Textbox(label="Dependency Parsing annotations")
            dp_button = gr.Button("Submit")
            dp_button.click(dependency_parsing, inputs=dp_input, outputs=dp_output)

        with gr.Tab("Part-of-Speech Tagging"):
            pos_input = gr.Textbox(
                label="Enter text",
                placeholder=POS_PLACEHOLDER,
            )
            pos_output = gr.Textbox(label="POS Tagging annotations")
            pos_button = gr.Button("Submit")
            pos_button.click(pos_tagging, inputs=pos_input, outputs=pos_output)

        with gr.Tab("Named Entity Recognition"):
            ner_input = gr.Textbox(
                label="Enter text",
                placeholder=NER_PLACEHOLDER,
            )
            ner_output = gr.Textbox(label="NER annotations")
            ner_button = gr.Button("Submit")
            ner_button.click(
                named_entity_recognition, inputs=ner_input, outputs=ner_output
            )

        gr.Markdown(
            """

        ## Installation

        The Grεεk NLP toolkit is available on PyPI for Python 3.9+:
        
        ```sh
        pip install gr-nlp-toolkit
        ```

        ## Github Repository

        Visit the [GitHub repository]("https://github.com/nlpaueb/gr-nlp-toolkit") for more information, such as documentation and full usage examples.

        ## About the Project
        
        The Greek NLP Toolkit is the state-of-the-art natural language processing toolkit for modern Greek, [developed by the Natural Language Processing Group at the Athens University of Economics and Business](http://nlp.cs.aueb.gr/).
        It supports named entity recognition, part-of-speech tagging, morphological tagging, dependency parsing, 
        and Greeklish to Greek conversion. This project is part of ongoing research aimed at advancing Greek language processing capabilities.
        <br>
        <br>    

        <div style="text-align: center;">
            <a href="https://github.com/nlpaueb/gr-nlp-toolkit">
                <img src="https://img.shields.io/badge/GitHub-Repository-181717?logo=github" alt="GitHub" style="display: block; margin: auto;">
            </a>
            <a href="https://github.com/nlpaueb/gr-nlp-toolkit">https://github.com/nlpaueb/gr-nlp-toolkit</a>
        </div>

        

        © 2024 The Greek NLP Toolkit. All rights reserved.
        """
        )

    return demo


# Launch the Gradio interface
if __name__ == "__main__":
    demo = create_demo()

    DEPLOY_TO_THE_PUBLIC_FLAG = False
    demo.launch(share=DEPLOY_TO_THE_PUBLIC_FLAG)