# Let us check our Python version before anything else.
import sys
print("Your current Python version is:", sys.version)
 
 

# You do not need to install venv if you are using Python 3.3 or later.
# The venv module is built into modern Python versions.
import venv
print("venv module is ready to help us create virtual environments.")

# Let us create a name for our first virtual environment.
venv_name = "my_first_env"
print("We will call our virtual environment:", venv_name)

# We cannot run system commands here, but this shows how to create a virtual environment.
print("To make a virtual environment, run:")
print("python -m venv my_first_env")
 
 

# Let us pretend we activated our environment.
print("(my_first_env) Now you are in your virtual environment!")

# Each virtual environment has its own installed packages.
print("Try installing a package with:")
print("pip install requests")

# Let us check which packages are installed inside the environment.
print("List the packages in your virtual environment with:")
print("pip list")

# You can use input() to ask for a new environment name.
name = input("Type a name for your new project environment: ")
print("Your chosen name is:", name)

# To leave the virtual environment, just deactivate it.
print("Deactivate with this command:")
print("deactivate")

# Virtual environments are just folders.
import os
print("Is the folder for your venv present?", os.path.isdir(venv_name))

# Clean up by deleting the virtual environment folder if you want.
import shutil
shutil.rmtree(venv_name, ignore_errors=True)
print("Virtual environment has been deleted (if it existed).")

# Example: Save installed packages to a requirements.txt file.
print("To save your package list, run:")
print("pip freeze > requirements.txt")

# To install from requirements.txt, use this pip command:
print("pip install -r requirements.txt")

# Mini-project: Set up and use a virtual environment for a weather app.
print("Step 1: Create and activate a virtual environment named 'weather_env'.")
print("Step 2: Install requests with 'pip install requests'.")
print("Step 3: Write a small script that prints the current weather in your city.")

# Mini-project continued: Example code for weather app (using input).
city = input("Enter your city for a weather report: ")
print("Pretending to fetch weather for", city, "...")
# Imagine this is where requests would pull from a real weather API.

# Best practice: Always use a virtual environment for every project.
print("Virtual environments protect your projects from accidental changes.")

# Troubleshooting: Command not found for venv?
print("If you see 'command not found', make sure you are using Python 3.3 or later and try 'python3 -m venv myenv'.")

# Extra tip: You can name venv folders anything you like.
print("Choose names that help you remember the project.")
print("Examples: blog_env, homework_env, game_env")

# Challenge: Can you create a new venv, install numpy, and check pip list inside?
print("Try this task: Set up a venv, install numpy, and use pip list to see it.")