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
RuntimeError Traceback (most recent call last)
<ipython-input-3-672ba140476c> in <module>()
12 i += 1
13 a = 1
---> 14 """)
/home/king/Sage/git/sage/local/lib/python2.7/site-packages/sage/misc/lazy_import.pyx
in sage.misc.lazy_import.LazyImport.__call__
(build/cythonized/sage/misc/lazy_import.c:3756)()
352 True
353 """
--> 354 return self.get_object()(*args, **kwds)
355
356 def __repr__(self):
/home/king/Sage/git/sage/local/lib/python2.7/site-packages/sage/misc/cython.pyc
in cython_compile(code, **kwds)
1005 with open(tmpfile,'w') as f:
1006 f.write(code)
-> 1007 return cython_import_all(tmpfile, get_globals(), **kwds)
/home/king/Sage/git/sage/local/lib/python2.7/site-packages/sage/misc/cython.pyc
in cython_import_all(filename, globals, **kwds)
895 code
896 """
--> 897 m = cython_import(filename, **kwds)
898 for k, x in iteritems(m.__dict__):
899 if k[0] != '_':
/home/king/Sage/git/sage/local/lib/python2.7/site-packages/sage/misc/cython.pyc
in cython_import(filename, **kwds)
870 - the module that contains the compiled Cython code.
871 """
--> 872 name, build_dir = cython(filename, **kwds)
873
874 oldpath = sys.path
/home/king/Sage/git/sage/local/lib/python2.7/site-packages/sage/misc/cython.pyc
in cython(filename, verbose, compile_message, use_cache, create_local_c_file,
annotate, sage_namespace, create_local_so_file)
669 except Exception as msg:
670 msg = str(msg) + "\n" + distutils_messages
--> 671 raise RuntimeError(msg.strip())
672
673 if verbose >= 0:
RuntimeError: fileno
What goes wrong?
I'd like to have it solved till the day after tomorrow, as the notebook
is to be used in some exercise group.
Best regards,
Simon
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