[python] How to install pip with Python 3?

=>Easy way to install Python any version on Ubuntu 18.04 or Ubuntu 20.04 follow these steps:-

Step 1: Update Local Repositories:-

sudo apt update

Step 2: Install Supporting Software:-

sudo apt install build-essential zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libreadline-dev libffi-dev wget

Step3: Create directory on your home directory To download the newest release of Python Source Code, navigate to the /python-source-files directory and use the wget command:-

mkdir python-source-files

Step 4: Download the Latest Version of Python Source Code:-

wget https://www.python.org/ftp/python/3.7.5/Python-3.7.5.tgz

"you can change python version by just modifies this:-"3.7.5" with the version you want example:-"3.5.2"

Step 5: Extract Compressed Files:-

tar –xf Python-3.7.5.tgz or tar xvzf Python-3.7.5.tgz

Step 6: Test System and Optimize Python:-

cd python-3.7.5 or your version of python.

Step 7: Now configure(Using the ––optimization option speeds code execution by 10-20%.):-

./configure ––enable–optimizations

OR you can also do this also if you facing ssl error:-

./configure --with-openssl

Step 8: Install a Second Instance of Python:-

sudo make altinstall

"It is recommended that you use the altinstall method. Your Ubuntu system may have software packages dependent on Python 2.x.

OR

If you want to Overwrite Default Python Installation/version:-

sudo make install"

Step 9:Now check Python Version:-

python3 ––version

Step 10: To install pip for python3 just go with this command:-

sudo apt-get install python3-pip

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