We are using `#!/usr/bin/env python`, for example on https://github.com/speedy-net/speedy-net/blob/master/speedy/core/manage.py
For bash we are using `#!/usr/bin/env bash`. I don't know if those are the best but they work. אורי u...@speedy.net On Sat, Jul 20, 2019 at 9:12 PM Michael Speer <knome...@gmail.com> wrote: > You may want to use `#!/usr/bin/env python3` instead. > > There is a concept in python called the virtual environment. This used to > be done with a tool called virtualenv in python2, and is now done mainly > through a venv module in python3. > > A virtual environment goes into a directory of your choosing and will have > its own python3 executable, and pip3 executable, and when you add > dependencies, they are also placed into the directory structure under your > chosen directory. > > When you do a `. <directory>/bin/activate` the included source will places > the virtual environment's bin/ folder at the beginning of your PATH > environment variable, making it the default python3 when you type it > without a full path. > > This allows you to run scripts that need different, or even conflicting, > sets of dependencies without bothering with the underlying linux > distribution's python installation's modules. > > If you use `#!/usr/bin/python3`, it will always use exactly the system > version that is installed, and the system's installed modules. > > Your scripts will still default to the system installation if a virtual > environment is not activated. So you lose nothing by doing it this way, but > gain a little control from it. > > > On Sat, Jul 20, 2019 at 1:41 PM Manfred Lotz <ml_n...@posteo.de> wrote: > > > Hi there, > > Pretty new to python I've got a question regarding the proper shebang > > for Python 3. > > > > I use > > #!/usr/bin/python3 > > > > which works fine. > > > > Today I saw > > #!/usr/bin/python3 -tt > > > > and was wondering what -tt means. > > > > Being on Fedora 30, Python 3.7.3 the man page of python3 doesn't even > > mention -t. > > > > python 2 man page mentions > > > > -t Issue a warning when a source file mixes tabs and spaces > > for indentation in a way that makes it depend on the worth > > of a tab expressed in spaces. Issue an error when the option is > > given twice. > > > > I guess that -t has the same meaning with python 3.7.3. > > > > > > My questions: > > > > 1. Is my guess correct? > > > > 2. Is it a bug that it is not mentioned? python3 --help doesn't mention > > it either. > > > > > > -- > > Manfred > > > > > > -- > > https://mail.python.org/mailman/listinfo/python-list > > > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/python-list
