install_python_and_virtual_env.md

This is the documentation on installing Python (hard way)

If you prefer to install in easy way

1. Find ppa for python package (compatible version)
2. sudo apt-get update
3. sudo apt-get -y install python3.7

I prefer to install from source, Following are the steps for that

1. Go to root of your system cd ~

2. Copy the link of python package from official website, for exp wget https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tgz

3. Extract code tar -xf Python-3.7.4.tgz

4. Move to Python directory cd python-3.7.4/

5. Configuration of python with system ./configure --enable-optimizations (For further optimization of python binary file, we can use --enable-optimizations, otherwise we can ignore it too)

6. Build all package make

7. Install required pakage sudo make install

8. Clean extra (unrequired) package make clean

9. Check if python path is all set which python3.7

10. Check version python3.7 --version

Create virtual environment to separate out package from the root

1. Install Virtualenv sudo apt-get update sudo pip install virtualenv

2. Check Python package location which python3

3. Create virtaul environment virtualenv -p /usr/bin/python3.7 scipy

4. To activate virtual environment source scipy/bin/activate

5. To deactivate source deactivate