app.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import requests
import spacy_udpipe
import streamlit as st
from spacy import displacy

try:
   spacy_udpipe.download("ar")
except:
   pass
nlp = spacy_udpipe.load("ar")
nlp.add_pipe("span_marker",
                 config={"model": "iahlt/span-marker-xlm-roberta-base-ar"})


DEFAULT_LABEL_COLORS = {
    "ORG": "#17A2B8",
    "ORGS": "#17A2B8",
    "ORGANIZATION": "#17A2B8",
    "PRODUCT": "#FA9F42",
    "COMMERCIAL_ITEM": "#FA9F42",
    "DUC": "#FA9F42",
    "GPE": "#FFC107",
    "LOC": "#28A745",
    "LOCATION": "#28A745",
    "PERSON": "#0069B4",
    "PER": "#0069B4",
    "PERS": "#0069B4",
    "TTL": "#FA8B1B",
    "TITLE": "#FA8B1B",
    "NORP": "#c887fb",
    "FAC": "#721817",
    "EVENT": "#2B4162",
    "EVE": "#2B4162",
    "LAW": "#C880B7",
    "LANGUAGE": "#437F97",
    "ANG": "#437F97",
    "WORK_OF_ART": "#0B6E4F",
    "WOA": "#0B6E4F",
    "DATE": "#849324",
    "TIME": "#849324",
    "TIMEX": "#849324",
    "MONEY": "#6C757D",
    "QUANTITY": "#FD151B",
    "ORDINAL": "#FD151B",
    "CARDINAL": "#FD151B",
    "PERCENT": "#F1D302",
    "MISC": "#e7d2e4",
    "OTHER": '#ff8197',
}

def get_html(html: str):
    """Convert HTML so it can be rendered."""
    WRAPPER = """<div style="overflow-x: auto; border: 1px solid #e6e9ef; border-radius: 0.25rem; padding: 1rem; margin-bottom: 2.5rem"; direction: rtl; >{}</div>"""
    # Newlines seem to mess with the rendering
    html = html.replace("\n", " ")
    style = "<style>mark.entity { display: inline-block }</style>"
    html = WRAPPER.format(html)
    return f"{style}{html}"


def page_init():
    st.header("Named Entity Recognition Demo")


@st.cache_data
def get_html_from_server(text):
    base_url = "https://ne-api.iahlt.org/api/arabic/ner/?text={}"

    def get_entities(text):
        text = text.strip()
        if text == "":
            return []
        response = requests.get(base_url.format(requests.utils.quote(text)))
        answer = response.json()
        ents = []
        for ent in answer["ents"]:
            if ent["entity_group"] == "O":
                continue
            ents.append({
                "start": ent["start"],
                "end": ent["end"],
                "label": ent["entity_group"]
            })
        answer["ents"] = ents
        return answer

    def render_entities(text):
        entities = get_entities(text)
        html = displacy.render(entities,
                               style="ent",
                               options={"direction": "rtl", "colors": DEFAULT_LABEL_COLORS},
                               manual=True)
        return html.replace("ltr", "rtl")

    return get_html(render_entities(text))


if __name__ == '__main__':
    page_init()

    sample_text = """
تمكن البطل الملاكم "محمد عيسى" القناص من الفوز في مباراته ببطولة دبي وذلك بعد انهائه النزال بالضربة القاضية. حيث يواصل البطل محمد عيسى مسيرته بتسلَّق الرُّتَب والألقاب ليصل لملاكمة الاحتراف.
    """.strip()

    text = st.text_area("Text", sample_text, height=200, max_chars=1000)
    btn = st.button("Annotate")
    style = """
    <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Scheherazade+New">
    <style>
    .stTextArea textarea {
        font-size: 20px;
        font-color: black;
        font-family: 'Scheherazade+New';
        direction: rtl;
    }
    .entities  {
        font-size: 16px;
        font-family: 'David+Libre';
        direction: rtl;
    }
    #MainMenu {visibility: hidden;}
    footer {visibility: hidden;}
   </style>
    """
    st.write(style, unsafe_allow_html=True)

    if text and btn:
        doc = nlp(text)
        html = displacy.render(
            doc,
            style="ent",
            options={"direction": "rtl", "colors": DEFAULT_LABEL_COLORS},
            manual=False,
        )

        nemo_html = get_html(html)
        iahlt_html = get_html_from_server(text)

        html = f"""
        <div style="display: flex; flex-direction: row; justify-content: space-between; direction: rtl">
            <div>
            <h3>WikiANN-trained model results</h3>
                {nemo_html}
            </div>
        </div>
        <div style="display: flex; flex-direction: row; justify-content: space-between; direction: rtl">
            <div>
            <h3>IAHLT results</h3>
                {iahlt_html}
            </div>
        </div>
        """
        st.write(html, unsafe_allow_html=True)

    else:
        st.write("")