Configuration management in Flask - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to load configuration from a Python file in Flask.

Flask

app = Flask(__name__)
app.config.from_pyfile([1])

Drag options to blanks, or click blank then click option'

A'config.json'

Bconfig

C'config.py'

Dconfig.py

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the filename without quotes causes an error.

Using a JSON file with from_pyfile does not work.

Flask's from_pyfile method expects the filename as a string, so you must pass the filename in quotes.

2fill in blank

medium

Complete the code to set a configuration value directly in Flask.

Flask

app = Flask(__name__)
app.config[[1]] = 'development'

Drag options to blanks, or click blank then click option'

A'ENV'

BENV

C'env'

Denvironment

Attempts:

3 left

💡 Hint

Common Mistakes

Using unquoted keys causes a NameError.

Using lowercase keys does not set the expected config.

Configuration keys must be strings, so use quotes around ENV.

3fill in blank

hard

Fix the error in loading configuration from an object in Flask.

Flask

class Config:
    DEBUG = True

app = Flask(__name__)
app.config.from_object([1])

Drag options to blanks, or click blank then click option'

AConfig()

BConfig

C'Config'

D'config.Config'

Attempts:

3 left

💡 Hint

Common Mistakes

Passing an instance causes an error.

Passing the class name as a string without module path fails if not imported.

The from_object method expects the class or its import path as a string, but passing the class itself (without parentheses) is correct.

4fill in blank

hard

Fill both blanks to create a config dictionary with only keys starting with 'MYAPP_'.

Flask

filtered_config = {k: v for k, v in app.config.items() if k.[1]('MYAPP_') and v [2] None}

Drag options to blanks, or click blank then click option'

Astartswith

Bis not

Cendswith

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'endswith' instead of 'startswith' filters wrong keys.

Using '==' to check None causes errors.

Use startswith to check key prefix and is not to exclude None values.

5fill in blank

hard

Fill all three blanks to load config from environment variable and fallback to default.

Flask

import os

config_path = os.getenv([1], [2])
app.config.from_pyfile([3])

Drag options to blanks, or click blank then click option'

A'MYAPP_CONFIG'

B'default.cfg'

Cconfig_path

D'config.cfg'

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the config filename directly instead of the variable.

Not providing a default fallback causes errors if env var missing.

Use os.getenv with the environment variable name and default file. Then load config from the resolved path.