embedding Python script in shell scripts

[DeaD_EyE]

You can do this with here-doc.

#!/bin/bash

echo "Hello World from bash"

python <<EOF
from __future__ import print_function
import sys
print(sys.version)
print("Using a variable from shell: $PWD")
EOF

python <<'EOF'
from __future__ import print_function
print('Without variables: $PWD')
EOF

echo "Preparing a list in shell"
li=(1 2 3 4 5 6)
echo ${li[@]}

python <<EOF
from __future__ import print_function
print('Using list from shell in Pyhon')
numbers = list(map(int, "${li[@]}".split()))
print(numbers)
EOF

if [ -x '/usr/bin/python3' ]; then
/usr/bin/python3 <<EOF
import sys
print('Python 3 exists on this system....')
print(sys.version)
EOF
fi


if [ -x '/usr/bin/python3' ]; then
        PYTHON='/usr/bin/python3'
elif [ -x '/usr/bin/python2' ]; then
        PYTHON='/usr/bin/python2'
elif [ -x '/usr/bin/python' ]; then
        PYTHON='/usr/bin/python'
fi

$PYTHON <<'EOF'
from __future__ import print_function
import sys
print('Using detected Python interpreter...')
print(sys.version)
EOF

Output:
Hello World from bash
2.7.14 (default, Sep 23 2017, 22:06:14) 
[GCC 7.2.0]
Using a variable from shell: /home/andre
Without variables: $PWD
Preparing a list in shell
1 2 3 4 5 6
Using list from shell in Pyhon
[1, 2, 3, 4, 5, 6]
Python 3 exists on this system....
3.6.3 (default, Oct  3 2017, 21:45:48) 
[GCC 7.2.0]
Using detected Python interpreter...
3.6.3 (default, Oct  3 2017, 21:45:48) 
[GCC 7.2.0]