How do i install python packages without any lib requirements

I am writing a Speech-to-Text script right now and it needs A TON of python librarys. This script has to be useable on every PC you start it on, so i need automation for the installation of these libs. I don't want to make the installation through another script in what ever language (batch, vbs, bash, ...) there is but in python.

My Problem:
I can't find any information about how to check if a package is installed or not without using some python librarys (that are most likly not installed).
Some use subprocess, others importlib but all of them are not installed by default when installing python

code should look like:

#1

try:
    import package
except ImportError:
    (code that installes the package)

#2 Even better would be a loop

for x in package_list:
    try:
    import x
except ImportError:
    (code that installes the package)

So i found the answer myself and wanted to share it with you all.

The way to automate installing packages in python without other additional librarys is to just use the standard library of python with the package os.

We can use a command like pip install {package} and run it with os.system(command).

Pip is installed standalone from version 3.4 upwards so there is no problem with that. Knowing if a package is installed can be automated with raising the error through a try except

try:
    import numpy
except ImportError:
    os.system("pip install numpy")
    import numpy

Even better would be a requirements.txt file, so that we can just do os.system("pip install -r requirements.txt")

To check if a Python package is installed without relying on additional libraries, you can try importing the package and handle the ImportError exception. If the package is not installed, the ImportError will be raised, allowing you to execute the installation code. Here's an example:

import importlib

def install_package(package_name):
    import subprocess
    subprocess.check_call(["pip", "install", package_name])

def check_and_install(package_name):
    try:
        importlib.import_module(package_name)
        print(f"{package_name} is already installed.")
    except ImportError:
        print(f"{package_name} is not installed. Installing...")
        install_package(package_name)

# List of packages to check and install
package_list = ["numpy", "pandas", "matplotlib"]

# Loop over the package list
for package in package_list:
    check_and_install(package)

In this code, the check_and_install function attempts to import the specified package using importlib.import_module. If the import is successful, it prints a message stating that the package is already installed. Otherwise, it prints a message indicating that the package is not installed and proceeds to call the install_package function to install the package using pip.

Note that this approach assumes that pip is installed on the system. If you need to handle cases where pip is not available, you may need to consider alternative installation methods or package managers depending on the operating system.