Flask error: werkzeug.routing.BuildError
Step 1: Import the necessary modules in your Flask application script:
from flask import Flask, render_template, url_for
Step 2: Create an instance of the Flask class:
app = Flask(__name__)
Step 3: Define a route in your application using the @app.route
decorator:
@app.route('/')
def home():
return render_template('home.html')
Step 4: In your HTML template (home.html
in this case), use the url_for
function to generate a URL for a given endpoint:
<a href="{{ url_for('home') }}">Home</a>
Step 5: Run your Flask application:
if __name__ == '__main__':
app.run(debug=True)
Note: The werkzeug.routing.BuildError
occurs when Flask is unable to build a URL for a given endpoint. This can happen if the endpoint specified in url_for
doesn't exist or if there's a mismatch in the arguments required by the endpoint. Make sure the endpoint name in url_for
matches the function name decorated with @app.route
and ensure that any required parameters for the endpoint are provided.