I recently installed Sage 6.3 on my Fedora 21 machine. I'm using version 6.3, which is slightly outdated, because it is the most recent thing available in yum's repositories. I also installed Mathematica on the same computer in the hope of being able to call it from within Sage.
Mathematica's terminal interface using the math command works, which according to this reference page should be all that I need. However, when I tell Sage to use mathematica either from the Sage command line or the notebook, Sage hangs. Here's a sample of my interaction with the terminal (the traceback is horrible, as is frequently the case in Sage):
sage: mathematica('hello world')
^CInterrupting Mathematica...
^C---------------------------------------------------------------------------
KeyboardInterrupt Traceback (most recent call last)
<ipython-input-1-9208bb19d841> in <module>()
----> 1 mathematica('hello world')
/usr/lib64/python2.7/site-packages/sage/interfaces/interface.pyc in __call__(self, x, name)
197
198 if isinstance(x, basestring):
--> 199 return cls(self, x, name=name)
200 try:
201 return self._coerce_from_special_method(x)
/usr/lib64/python2.7/site-packages/sage/interfaces/expect.pyc in __init__(self, parent, value, is_name, name)
1310 else:
1311 try:
-> 1312 self._name = parent._create(value, name=name)
1313 # Convert ValueError and RuntimeError to TypeError for
1314 # coercion to work properly.
/usr/lib64/python2.7/site-packages/sage/interfaces/interface.pyc in _create(self, value, name)
387 def _create(self, value, name=None):
388 name = self._next_var_name() if name is None else name
--> 389 self.set(name, value)
390 return name
391
/usr/lib64/python2.7/site-packages/sage/interfaces/mathematica.pyc in set(self, var, value)
508 cmd = '%s=%s;'%(var,value)
509 #out = self.eval(cmd)
--> 510 out = self._eval_line(cmd, allow_use_file=True)
511 if len(out) > 8:
512 raise TypeError("Error executing code in Mathematica\nCODE:\n\t%s\nMathematica ERROR:\n\t%s"%(cmd, out))
/usr/lib64/python2.7/site-packages/sage/interfaces/mathematica.pyc in _eval_line(self, line, allow_use_file, wait_for_prompt, restart_if_needed)
535 def _eval_line(self, line, allow_use_file=True, wait_for_prompt=True, restart_if_needed=False):
536 s = Expect._eval_line(self, line,
--> 537 allow_use_file=allow_use_file, wait_for_prompt=wait_for_prompt)
538 return str(s).strip('\n')
539
/usr/lib64/python2.7/site-packages/sage/interfaces/expect.pyc in _eval_line(self, line, allow_use_file, wait_for_prompt, restart_if_needed)
890 out = ''
891 except KeyboardInterrupt:
--> 892 self._keyboard_interrupt()
893 raise KeyboardInterrupt("Ctrl-c pressed while running %s"%self)
894 if self._terminal_echo:
/usr/lib64/python2.7/site-packages/sage/interfaces/mathematica.pyc in _keyboard_interrupt(self)
420 e = self._expect
421 e.sendline(chr(3)) # send ctrl-c
--> 422 e.expect('Interrupt> ')
423 e.sendline("a") # a -- abort
424 e.expect(self._prompt)
/usr/lib64/sagemath/site-packages/pexpect.pyc in expect(self, pattern, timeout, searchwindowsize)
914 """
915 compiled_pattern_list = self.compile_pattern_list(pattern)
--> 916 return self.expect_list(compiled_pattern_list, timeout, searchwindowsize)
917
918 def expect_list(self, pattern_list, timeout = -1, searchwindowsize = -1):
/usr/lib64/sagemath/site-packages/pexpect.pyc in expect_list(self, pattern_list, timeout, searchwindowsize)
965 raise TIMEOUT ('Timeout exceeded in expect_list().')
966 # Still have time left, so read more data
--> 967 c = self.read_nonblocking (self.maxread, timeout)
968 incoming = incoming + c
969 if timeout is not None:
/usr/lib64/sagemath/site-packages/pexpect.pyc in read_nonblocking(self, size, timeout)
546 raise EOF ('End Of File (EOF) in read_nonblocking(). Pokey platform.')
547
--> 548 r, w, e = select.select([self.child_fd], [], [], timeout)
549 if not r:
550 if not self.isalive():
/usr/lib64/python2.7/site-packages/sage/ext/c_lib.so in sage.ext.c_lib.sage_python_check_interrupt (build/cythonized/sage/ext/c_lib.c:1683)()
/usr/lib64/python2.7/site-packages/sage/ext/c_lib.so in sage.ext.c_lib.sig_raise_exception (build/cythonized/sage/ext/c_lib.c:769)()
KeyboardInterrupt:
sage:
The equivalent in Mathematica's own interface works just fine:
Mathematica 10.1.0 for Linux x86 (64-bit)
Copyright 1988-2015 Wolfram Research, Inc.
In[1]:= hello world
Out[1]= hello world
In[2]:=
Am I doing something wrong, or is this a bug in Sage? Would downloading and building the latest version (6.7) manually fix the problem?
EDIT:
I am using Mathematica 10.1.0. Could it be that be my problem, i.e. the older version of Sage doesn't know how to handle the newer version of Mathematica?
