[Solved] You wrote this Flask code but get an error when running it: from flask import Flask app = Flask(__name__) @app.route('/hello') def hello(): print('Hello World!... | Flask

Flask - Ecosystem and Patterns

You wrote this Flask code but get an error when running it:

from flask import Flask
app = Flask(__name__)

@app.route('/hello')
def hello():
print('Hello World!')

What is the main issue causing the error?

AIndentation error inside the function

BMissing parentheses in print statement

CRoute decorator syntax is wrong

DFlask app not initialized properly

Step-by-Step Solution

Solution:

Step 1: Check function body indentation
Python requires the function body to be indented; here, print is not indented.
Step 2: Confirm other syntax correctness
Print statement has parentheses (Python 3), route decorator syntax and app initialization are correct.
Final Answer:
Indentation error inside the function -> Option A
Quick Check:
Python needs indented function bodies [OK]

Quick Trick: Check indentation inside functions for errors [OK]

Common Mistakes:

MISTAKES

Master "Ecosystem and Patterns" in Flask

9 interactive learning modes - each teaches the same concept differently

More Flask Quizzes

You wrote this Flask code but get an error when running it: