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python_advanced
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module_06_debugging_begin/materials/divider.py
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16 окт 2025, 16:47
16 окт 2025, 16:47
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import logging from flask import Flask from flask_wtf import FlaskForm from wtforms import IntegerField from wtforms.validators import InputRequired app = Flask(__name__) logger = logging.getLogger("divider") class DivideForm(FlaskForm): a = IntegerField(validators=[InputRequired()]) b = IntegerField(validators=[InputRequired()]) @app.route("/divide/", methods=["POST"]) def divide(): form = DivideForm() if form.validate_on_submit(): a, b = form.a.data, form.b.data logger.debug(f"Form is valid. a={a}, b={b}") return f"a / b = {a / b:.2f}" logger.error(f"Form is not valid, error={form.errors}") return f"Bad request", 400 @app.errorhandler(ZeroDivisionError) def handle_exception(e: ZeroDivisionError): logger.exception("We are unable to divide by zero!", exc_info=e) return "We are unable to divide by zero!", 400 if __name__ == "__main__": logging.basicConfig(level=logging.DEBUG) logger.info("Started divider server") app.config["WTF_CSRF_ENABLED"] = False app.run(debug=True)