query python env

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  • David Bear
    #1

    query python env

    How does one query the python environment, ie pythonhome, pythonpath,
    etc.

    also, are there any HOWTO's on keeping multiple versions of python
    happy?
    Tags: None
    • Michael Hoffman
      #2
      Re: query python env

      David Bear wrote:[color=blue]
      > How does one query the python environment, ie pythonhome[/color]

      sys.prefix
      [color=blue]
      > pythonpath[/color]

      sys.path
      [color=blue]
      > etc.[/color]

      sys.etc
      [color=blue]
      > also, are there any HOWTO's on keeping multiple versions of python
      > happy?[/color]

      I think it is sufficiently trivial that none is needed. Just make sure
      the distributions are installed in different directories.

      What problems are you having?
      --
      Michael Hoffman

        Comment

        • Scott David Daniels
          #3
          Re: query python env

          David Bear wrote:[color=blue]
          > How does one query the python environment, ie pythonhome, pythonpath,
          > etc.
          >
          > also, are there any HOWTO's on keeping multiple versions of python
          > happy?[/color]

          In general, (and in this case) the answer is system-specific.
          You need to explain (A) what operating system, and (B) what you
          mean by multiple Python versions.

          For example, for Windows 2K/XP, As long as you try for only
          distinct major versions (2.2.x, 2.3.x, 2.4.x). There should
          not be a problem. The primary issues are where (and how) does
          your system get to the python files.


          --Scott David Daniels
          Scott.Daniels@A cm.Org

            Comment

            • Steve Holden
              #4
              Re: query python env

              Michael Hoffman wrote:
              [color=blue]
              > David Bear wrote:
              >[color=green]
              >> How does one query the python environment, ie pythonhome[/color]
              >
              >
              > sys.prefix
              >[color=green]
              > > pythonpath[/color]
              >
              > sys.path
              >[color=green]
              >> etc.[/color]
              >
              >[/color]
              [...]
              I suspect rather that the OP is looking for os.environ, as in:

              [sholden@headrat sholden]$ ENVAR=value
              [sholden@headrat sholden]$ export ENVAR
              [sholden@headrat sholden]$ python
              Python 2.2.1 (#1, Aug 30 2002, 12:15:30)
              [GCC 3.2 20020822 (Red Hat Linux Rawhide 3.2-4)] on linux2
              Type "help", "copyright" , "credits" or "license" for more information.[color=blue][color=green][color=darkred]
              >>> import os
              >>> os.environ["ENVAR"][/color][/color][/color]
              'value'


              regards
              Steve
              --
              Steve Holden http://www.holdenweb.com/
              Python Web Programming http://pydish.holdenweb.com/
              Holden Web LLC +1 703 861 4237 +1 800 494 3119

                Comment

                • Michael Hoffman
                  #5
                  Re: query python env

                  Steve Holden wrote:[color=blue]
                  > I suspect rather that the OP is looking for os.environ, as in:[/color]

                  He was using the examples of PYTHONHOME and PYTHONPATH which have
                  specific meanings. Using sys.prefix is better than
                  os.environ["PYTHONHOME "], which is unlikely to be set.
                  --
                  Michael Hoffman

                    Comment

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