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sudo apt install python2.7 python2.7-dev -y && curl -O https://bootstrap.pypa.io/pip/2.7/get-pip.py && sudo python2.7 get-pip.py
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Installation
Step 1 - Update system
$$$ sudo apt-get update
Step 2 - Install pip3
$$$ sudo apt-get -y install python3-pip
Step 3 - Verification
$$$ pip3 --version
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You cannot just pip install python3 because it is not a library.
If you want to install the latest python3:
https://www.python.org/ftp/python/3.8.2/python-3.8.2.exe
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The problem which creates the difference between a pip and pip3 is the path changing which is followed by almost every Operating system.
If you want to start working with python-pip using a Linux system so use the “apt-get” command to download the pip.