python - How to import rlib in an rpython program to be translated using pypy's rpython -

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i trying file io in program compiled pypy's translate tool. since open , os.open not supported, need rlib.streamio. tried import rlib gives following error

[translation:error]  importerror': import statement raises [type importerror: 'no module named rlib']

i translate using

$ ./pypy-1.4.1-src/pypy/translator/goal/translate.py myscript.py

how import rlib in myscript.py?

it's

from pypy.rlib import streamio

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