On Tue, 13 Nov 2018 at 11:31, James Womack <james.c.wom...@gmail.com> wrote:
> Thank you. I suspect you are right. > > I am right to think that installing packages in this way requires that I > have compiled Sage Math from source? In that case, I may need to switch > from the binary version in the Ubuntu repositories back to compiling from > source. > in theory you could do it with a binary install, in practice it might be broken. Try and see if sage -i fricas works. James > > On Tuesday, 13 November 2018 16:07:07 UTC, John H Palmieri wrote: >> >> FriCAS is an optional Sage package, so it is not automatically installed. >> If you have built from source, you can easily install it (with "sage -i >> fricas"), and maybe that's what you did before. >> >> John >> >> >> On Tuesday, November 13, 2018 at 7:22:49 AM UTC-8, James Womack wrote: >>> >>> I am using Sage Math installed from the Ubuntu 18.04 LTS repositories ( >>> https://packages.ubuntu.com/search?keywords=sagemath). >>> >>> I was previously using Sage Math v8.1 installed from source, but when I >>> upgraded to 18.04 LTS opted for the easier to install and update package. >>> >>> I'm a bit puzzled because (I think) my previous installation from source >>> was packaged with FriCAS, but the version from the Ubuntu repositories does >>> not seem to be packaged with this. >>> >>> When I try to use the FriCAS interface in the version of Sage Math >>> installed from the repositories, the following exception occurs: >>> >>> ---------------------------------------------------------------------------TypeError >>> Traceback (most recent call >>> last)<ipython-input-1-3651dd5de2cf> in <module>()----> 1 fricas('3 * 5') >>> /usr/lib/python2.7/dist-packages/sage/interfaces/interface.pyc in >>> __call__(self, x, name) 280 281 if isinstance(x, >>> string_types):--> 282 return cls(self, x, name=name) 283 >>> try: 284 return self._coerce_from_special_method(x) >>> /usr/lib/python2.7/dist-packages/sage/interfaces/expect.pyc in >>> __init__(self, parent, value, is_name, name) 1386 except >>> (RuntimeError, ValueError) as x: 1387 >>> self._session_number = -1-> 1388 raise_(TypeError, x, >>> sys.exc_info()[2]) 1389 except BaseException: 1390 >>> self._session_number = -1 >>> /usr/lib/python2.7/dist-packages/sage/interfaces/expect.pyc in >>> __init__(self, parent, value, is_name, name) 1381 else: 1382 >>> try:-> 1383 self._name = parent._create(value, >>> name=name) 1384 # Convert ValueError and RuntimeError to >>> TypeError for 1385 # coercion to work properly. >>> /usr/lib/python2.7/dist-packages/sage/interfaces/interface.pyc in >>> _create(self, value, name) 476 def _create(self, value, name=None): >>> 477 name = self._next_var_name() if name is None else name--> 478 >>> self.set(name, value) 479 return name 480 >>> /usr/lib/python2.7/dist-packages/sage/interfaces/fricas.pyc in set(self, >>> var, value) 530 """ 531 cmd = >>> '%s%s%s;'%(var,self._assign_symbol(), value)--> 532 output = >>> self.eval(cmd, reformat=False) 533 self._check_errors(value, >>> output) 534 >>> /usr/lib/python2.7/dist-packages/sage/interfaces/fricas.pyc in eval(self, >>> code, strip, synchronize, locals, allow_use_file, split_lines, reformat, >>> **kwds) 752 synchronize=synchronize, >>> locals=locals, 753 >>> allow_use_file=allow_use_file, split_lines=split_lines,--> 754 >>> **kwds) 755 # we remove carriage returns (\r) to >>> make parsing easier 756 # they are sent depending on how fricas >>> was invoked: >>> /usr/lib/python2.7/dist-packages/sage/interfaces/expect.pyc in eval(self, >>> code, strip, synchronize, locals, allow_use_file, split_lines, **kwds) >>> 1295 elif split_lines: 1296 return >>> '\n'.join([self._eval_line(L, allow_use_file=allow_use_file, **kwds)-> 1297 >>> for L in code.split('\n') if L != >>> '']) 1298 else: 1299 return >>> self._eval_line(code, allow_use_file=allow_use_file, **kwds) >>> /usr/lib/python2.7/dist-packages/sage/interfaces/expect.pyc in >>> _eval_line(self, line, allow_use_file, wait_for_prompt, restart_if_needed) >>> 905 try: 906 if self._expect is None:--> 907 >>> self._start() 908 E = self._expect 909 >>> try: >>> /usr/lib/python2.7/dist-packages/sage/interfaces/fricas.pyc in _start(self) >>> 281 # setting the prompt properly is necessary for restarting >>> FriCAS 282 self._prompt = FRICAS_FIRST_PROMPT--> 283 >>> Expect._start(self) 284 for line in FRICAS_INIT_CODE: 285 >>> self.eval(line, reformat=False) >>> /usr/lib/python2.7/dist-packages/sage/interfaces/expect.pyc in _start(self, >>> alt_message, block_during_init) 489 # Change pexpect >>> errors to RuntimeError 490 raise RuntimeError("unable to >>> start %s because the command %r failed: %s\n%s" %--> 491 >>> (self.name(), cmd, e, self._install_hints())) 492 except >>> BaseException: 493 self._expect = None >>> TypeError: unable to start fricas because the command 'fricas -nosman' >>> failed: The command was not found or was not executable: fricas. >>> Unfortunately I do not have my previous from-source installation to hand to >>> test this with. >>> >>> Should FriCAS be packaged with Sage Math v8.1? 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