VP 10: Python 3 Setup (10 pts)

What You Need

Purpose

Google Colab This is the new way to get a Python environment in the cloud, including an AI to help write your code. In a browser, go to https://colab.research.google.com/ If you see a blue "Sign In" button at the top right, click it and log into a Google account. From the menu, click File, "New notebook".

Task 1: Try It Online

https://tio.run/#python3

print("Hello, World!")

The Output section shows the result, as shown below.

Flag VP 10.1: Help (2 pts) Run this code: help() The flag is covered by a green rectangle in the image below.

Using the Network

import requests
r = requests.get("https://samsclass.info")

The program fails, with errors, as shown below.

This online Python sandbox doesn't allow sending network traffic. You can use it for some of the challenges, but not all of them.

Task 2: Run Python 3 Locally

To see if you already have it, execute this command in a Terminal or Command Prompt window:

python3

Enter this command to exit the Python interpreter:

exit()

If Python 3 is not already installed, follow the instructions in the gray box below to install it.

Installing Python 3 on a Mac Follow the instructions below: https://www.maketecheasier.com/using-python-3-on-mac/

Installing Python 3 on Windows Download te latest version here: https://www.python.org/downloads/ Start the installer. At the bottom of the first window, check the "Add Python 3.9 to PATH" box, as shown below. Then click Install Now.

Creating a Program

Linux or Mac In a Terminal window, execute this command: nano hello.py Enter this text, as shown below: print("HELLO") Press Ctrl+X, Y, Enter to save the file. Then execute this command to run the program: python hello.py It prints out "HELLO", as shown below.

Windows In a Command Prompt window, execute this command, as shown below. notepad hello.py A box pops up asking "Do you want to create a new file?". Click Yes. In Notepad, enter this code, as shown below. print("Hello, World") In Notepad, click File, Save to save the file. In the Command Prompt, execute this command, as shown below. python3 hello.py The program runs, printing out "Hello, World!", as shown below.

Flag VP 10.2: Requests (8 pts) Execute this command to install the "requests" library: python3 -m pip install requests "error: externally-managed-environment" If you see this error message, you need to create a Python virtual environment with these commands: python3 -m venv venv source venv/bin/activate Then run this program: import requests r = requests.get("https://samsclass.info") print(r.status_code) The flag is covered by a green rectangle in the image below.