[Solved] Identify the error in this Flask CLI command code: from flask import Flask app = Flask(__name__) @app.cli.command() def hello(): print('Hello from CLI') if __name__ == '__main__': app.run() | Flask

Flask - Ecosystem and Patterns

Identify the error in this Flask CLI command code:

from flask import Flask
app = Flask(__name__)

@app.cli.command()
def hello():
    print('Hello from CLI')

if __name__ == '__main__':
    app.run()

AMissing @click.argument decorator

BUsing print instead of click.echo

CRunning app.run() in CLI command file

DNo error, code is correct

Step-by-Step Solution

Solution:

Step 1: Review the purpose of app.run()
app.run() starts the Flask web server and is not needed or appropriate in CLI command files.
Step 2: Understand CLI command usage
Flask CLI commands run via flask command, so running app.run() here will start the server unnecessarily and block CLI commands.
Final Answer:
Running app.run() in CLI command file -> Option C
Quick Check:
app.run() should not be in CLI command files [OK]

Quick Trick: Don't call app.run() in CLI command scripts [OK]

Common Mistakes:

MISTAKES

Master "Ecosystem and Patterns" in Flask

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Identify the error in this Flask CLI command code: