RPython Environment Variables
I am writing a tool in RPython that needs to access environment variables. Now, all has been going well, but I noticed something interesting. The RPython translator sees os.environ as constant. But, will it still be constant on other platforms? What I'm saying is, are the environment variables permanently embedded into the application? i.e., if I run it on another PC, the values will be the same? Or is there an RLib equivalent? Because I really don't feel like writing a C wrapper... -- Ryan
2013/11/1 Ryan Gonzalez <rymg19@gmail.com>
RPython magic... In RPython, os.environ is not a dictionary, but a clever wrapper around getenv() and putenv(). See the implementation in ll_os_environ.py: https://bitbucket.org/pypy/pypy/src/default/rpython/rtyper/module/ll_os_envi... - as an object, os.environ is equivalent to None: nothing is embedded in the application. - only some methods are implemented, and redirect to some implementation that use the C primitives. Yes, I also found this "Controller" crazy the first time I saw it. But very clever and powerful. -- Amaury Forgeot d'Arc
2013/11/1 Ryan Gonzalez <rymg19@gmail.com>
RPython magic... In RPython, os.environ is not a dictionary, but a clever wrapper around getenv() and putenv(). See the implementation in ll_os_environ.py: https://bitbucket.org/pypy/pypy/src/default/rpython/rtyper/module/ll_os_envi... - as an object, os.environ is equivalent to None: nothing is embedded in the application. - only some methods are implemented, and redirect to some implementation that use the C primitives. Yes, I also found this "Controller" crazy the first time I saw it. But very clever and powerful. -- Amaury Forgeot d'Arc
participants (3)
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Amaury Forgeot d'Arc -
Benjamin Peterson -
Ryan Gonzalez