On Sunday, April 15, 2018 at 7:11:06 AM UTC-7, Simon King wrote: > > Hi! > > The following cython code compiles fine in SageMath command line version > and it *used* to compile fine in the jupyter notebook one year ago: > > cython(""" > def mantisse(): > cdef double a = 1 > cdef double b = 2 > cdef int i = 0 > while True: > a += b**(-i) > print("%2d: %.53f"%(i,a)) > if a==1: > return i-1 > i += 1 > a = 1 > """) > > However, in the jupyter notebook I no get the error > > You can trigger the error by a straight call
sage.misc.cython.cython(<cython file>) The traceback (there is only one frame): ... 669 except Exception as msg: 670 msg = str(msg) + "\n" + distutils_messages--> 671 raise RuntimeError(msg.strip()) 672 673 if verbose >= 0: RuntimeError: fileno I suspect it's this commit: https://git.sagemath.org/sage.git/commit/?h=c59f37ad5ee719b23293a0f677422f5f818b7981 where this code was committed: try: # Capture errors from distutils and its child processes with open(os.path.join(target_dir, name + ".err"), 'w+') as errfile: try: with redirection(sys.stderr, errfile, close=False): dist.run_command("build") finally: errfile.seek(0) distutils_messages = errfile.read() except Exception as msg: msg = str(msg) + "\n" + distutils_messages raise RuntimeError(msg.strip()) This works on the command line: sage: F=open("er",'w+') sage: sage.misc.sage_ostools.redirection(sys.stderr,F) but in jupyter we get an error: UnsupportedOperation: fileno because sys.stderr is now: <ipykernel.iostream.OutStream object at 0x7ff909f6ed10> It looks like sage_ostools.redirection might need some love. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to email@example.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.