import subprocess
import sys
import importlib

def install_and_import(package_name, import_name=None):
    """
    Installs a package using pip and imports it without restarting the script.
    :param package_name: The name of the package to install (e.g., 'scikit-learn')
    :param import_name: The actual name used in code (e.g., 'sklearn'). 
                        Defaults to package_name if not provided.
    """
    if import_name is None:
        import_name = package_name

    try:
        # Check if the module is already installed
        importlib.import_module(import_name)
        print(f"'{import_name}' is already installed. Skipping installation.")
    except ImportError:
        # If not found, install it
        print(f"'{package_name}' not found. Installing...")
        subprocess.check_call([sys.executable, "-m", "pip", "install", package_name])
        
        # Load the newly installed module into the global namespace
        globals()[import_name] = importlib.import_module(import_name)
        print(f"Successfully installed and imported '{import_name}'.")

# Example Usage:
install_and_import('requests')

# Now you can use it immediately
res = requests.get("https://google.com")
print(f"Connection status: {res.status_code}")