Why ? I cannot seem to open a file anywhere within assembly.py. When I use "NOT_RPYTHON"

in method open_file then I cannot use it in functions like assemble_loop because it's NOT_RPYTHON.

Happens when I call the following function in x86/assembly.py: 

def open_file(self):                                                               

        self.vtune_file = open('.\vtune.log', 'w')   

self.fixup_target_tokens(rawstart)                                             

self.materialize_done(rawstart, full_size, "loop%d" % looptoken.number)        

self.open_file()

[translation:ERROR] Exception: 'no_release_gil' function can release the GIL: <function assemble_loop at 0x0000000070d4d2e0>

[GilAnalyzer] analyze_direct_call((rpython.rtyper.lltypesystem.rffi:3)ccall_fopen__arrayPtr_arrayPtr): True

[GilAnalyzer] analyze_direct_call((rpython.rtyper.lltypesystem.rffi:236)fopen__arrayPtr_arrayPtr_star_2): True

[GilAnalyzer] analyze_direct_call((rpython.rlib.rfile:154)create_file): True

[translation] start debugger...

> /opt/vtune_pypy/rpython/translator/backendopt/gilanalysis.py(51)analyze()

-> " %s\n%s" % (func, err.getvalue()))

(Pdb+) print func

<function assemble_loop at 0x0000000070d4d2e0>

(Pdb+)