app.py

import os
from flask import Flask, request, render_template
from lime_explainer import explainer, tokenizer, METHODS

app = Flask(__name__)
SECRET_KEY = os.urandom(24)

@app.route('/')
@app.route('/result', methods=['POST'])
def index():
    exp = ""
    if request.method == 'POST':
        text = tokenizer(request.form['entry'])
        method = request.form['classifier']
        n_samples = request.form['n_samples']
        if any(not v for v in [text, n_samples]):
            raise ValueError("Please do not leave text fields blank.")

        if method != "base":
            exp = explainer(method,
                            path_to_file=METHODS[method]['file'],
                            text=text,
                            lowercase=METHODS[method]['lowercase'],
                            num_samples=int(n_samples))
            exp = exp.as_html()

        return render_template('index.html', exp=exp, entry=text, n_samples=n_samples, classifier=method)
    return render_template('index.html', exp=exp)


if __name__ == '__main__':
    app.secret_key = SECRET_KEY
    app.run(debug=True)