Installing Flask - Practice Exercises

Challenge - 5 Problems

🧠 Conceptual

intermediate

What command installs Flask in a Python environment?

You want to add Flask to your Python project. Which command correctly installs Flask using pip?

A pip install flask

B pip get flask

C install flask

D python flask install

💡 Hint

Use pip, the Python package installer, followed by the install keyword and the package name.

The correct command to install Flask is 'pip install flask'. Other options are invalid commands.

📝 Syntax

intermediate

Which command installs Flask for Python 3 specifically?

You have both Python 2 and Python 3 installed. Which command installs Flask for Python 3?

A pip install flask3

B pip3 install flask

C python3 -m pip install flask

D python -m pip install flask3

💡 Hint

Use the python3 command with the -m flag to run pip for Python 3.

The command 'python3 -m pip install flask' ensures Flask installs for Python 3. 'pip3 install flask' often works but may not be available on all systems.

🔧 Debug

advanced

Why does 'pip install Flask' fail with 'command not found' error?

You run 'pip install Flask' but get 'command not found'. What is the most likely cause?

A You need to use 'pip3' instead of 'pip'

B Flask package does not exist

C You must run the command inside a Flask project folder

D pip is not installed or not in your system PATH

💡 Hint

Check if pip is installed and accessible from your terminal.

The error means the system cannot find the pip command. This usually means pip is missing or not in PATH.

❓ component_behavior

advanced

What happens if you run 'pip install flask' twice in a row?

You run 'pip install flask' two times consecutively in the terminal. What is the expected behavior?

A The second run will detect Flask is already installed and do nothing or upgrade if needed

B The second run will uninstall Flask

C The second run will cause a syntax error

D The second run will install a different version of Flask automatically

💡 Hint

pip checks if the package is installed before installing again.

Running 'pip install flask' again usually confirms the package is installed and skips or upgrades it if a newer version exists.

❓ state_output

expert

What is the output of 'pip show flask' after installing Flask?

After installing Flask, you run 'pip show flask'. What key information does this command output?

A Only the Flask version number

B Package name, version, location, dependencies, and summary

C A list of all installed packages

D An error saying Flask is not installed

💡 Hint

The 'pip show' command displays detailed info about a specific package.

'pip show flask' outputs details like name, version, install location, dependencies, and a short description.