Right from the very first bytes of your cli app you run into issues. The interpreter line. You have to choose #!/usr/bin/python or #!/usr/bin/python2 or #!/us

Right from the very first bytes of your cli app you run into issues. The interpreter line. You have to choose #!/usr/bin/python or #!/usr/bin/python2 or #!/usr/bin/python3 (or similar variations with /usr/bin/env). All of these happily ignored by Windows. The latter two may not exist on some platforms. The first one could be invoking either a python2 or python3 interpreter. There's some python magic for determining the version, but if you use a feature not supported by the version it raises an uncatchable exception...because python's parser has control before your code has control. This isn't the only deployment issue, but a good example of what you're in for.