New submission from Tom Kent <t...@teeks99.com>: According to the documentation https://docs.python.org/3/using/windows.html#windows-embeddable
> When extracted, the embedded distribution is (almost) fully isolated > from the user’s system, including environment variables, system registry > settings, and installed packages The embedded distribution should ignore the environment variables. This is echoed in this prior issue that thought `PYTHONPATH` not being respected was a bug: https://bugs.python.org/issue28245 Regardless of the decision to respect environment variables, the message that is displayed when running the distribution's `python --help` needs to indicate how it will act. Currently, for the embedded distribution, which doesn't respect the env variables, there is a section in the output from running `python -help` that indicates: ``` Other environment variables: PYTHONSTARTUP: file executed on interactive startup (no default) PYTHONPATH : ';'-separated list of directories prefixed to the default module search path. The result is sys.path. PYTHONHOME : alternate <prefix> directory (or <prefix>;<exec_prefix>). The default module search path uses <prefix>\python{major}{minor}. PYTHONPLATLIBDIR : override sys.platlibdir. PYTHONCASEOK : ignore case in 'import' statements (Windows). PYTHONUTF8: if set to 1, enable the UTF-8 mode. PYTHONIOENCODING: Encoding[:errors] used for stdin/stdout/stderr. PYTHONFAULTHANDLER: dump the Python traceback on fatal errors. PYTHONHASHSEED: if this variable is set to 'random', a random value is used to seed the hashes of str and bytes objects. It can also be set to an integer in the range [0,4294967295] to get hash values with a predictable seed. PYTHONMALLOC: set the Python memory allocators and/or install debug hooks on Python memory allocators. Use PYTHONMALLOC=debug to install debug hooks. PYTHONCOERCECLOCALE: if this variable is set to 0, it disables the locale coercion behavior. Use PYTHONCOERCECLOCALE=warn to request display of locale coercion and locale compatibility warnings on stderr. PYTHONBREAKPOINT: if this variable is set to 0, it disables the default debugger. It can be set to the callable of your debugger of choice. PYTHONDEVMODE: enable the development mode. PYTHONPYCACHEPREFIX: root directory for bytecode cache (pyc) files. ``` This may lead users (it did lead this one) to assume that they are doing something wrong when for example the output of `sys.path` doesn't included items in `os.environ["PYTHONPATH"]`. Realizing that it may be difficult to achieve, the help output should match the state of what the interpreter will actually do if run. ---------- components: Windows messages: 380274 nosy: paul.moore, steve.dower, teeks99, tim.golden, zach.ware priority: normal severity: normal status: open title: Embeddable Python indicates that it uses PYTHONPATH versions: Python 3.7, Python 3.8, Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue42252> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
