using shebang python code example

Example 1: python shebang

#!/usr/bin/env python3

Example 2: shebang python

#!/usr/bin/env python

Example 3: using shebang python

dadaist Apr 1 '20 at 8:11: "If your script is Python 3 only 
and your target system might have a Python 2 executable in PATH 
then I recommend #!/usr/bin/env python3 instead."