sage:fricas('3') 

3 

sage: fricas(3) --------------------------------------------------------------------------- RuntimeError Traceback (most recent call last) File ~/sage/src/sage/interfaces/expect.py:1519, in ExpectElement.__init__(self, parent, value, is_name, name) 1518 try: -> 1519 self._name = parent._create(value, name=name) 1520 # Convert ValueError and RuntimeError to TypeError for 1521 # coercion to work properly. File ~/sage/src/sage/interfaces/interface.py:520, in Interface._create(self, value, name) 519 name = self._next_var_name() if name is None else name --> 520 self.set(name, value) 521 return name File ~/sage/src/sage/interfaces/fricas.py:681, in FriCAS.set(self, var, value) 680 output = self.eval(cmd, reformat=False) --> 681 self._check_errors(value, output) File ~/sage/src/sage/interfaces/fricas.py:574, in FriCAS._check_errors(self, line, output) 573 output = output.replace(old, new) --> 574 raise RuntimeError("An error occurred when FriCAS evaluated '%s':\n%s" % (line, output)) 576 # or even an error RuntimeError: An error occurred when FriCAS evaluated '3': Function declaration sageprint : InputForm -> String has been added to workspace. During handling of the above exception, another exception occurred: TypeError Traceback (most recent call last) Cell In[1], line 1 ----> 1 fricas(Integer(3)) File ~/sage/src/sage/misc/lazy_import.pyx:397, in sage.misc.lazy_import.LazyImport.__call__() 395 True 396 """ --> 397 return self.get_object()(*args, **kwds) 398 399 def __repr__(self): File ~/sage/src/sage/interfaces/interface.py:306, in Interface.__call__(self, x, name) 299 return cls(self, x, name=name) 300 try: 301 # Special methods do not and should not have an option to 302 # set the name directly, as the identifier assigned by the 303 # interface should stay consistent. An identifier with a 304 # user-assigned name might change its value, so we return a 305 # new element. --> 306 result = self._coerce_from_special_method(x) 307 return result if name is None else result.name(new_name=name) 308 except TypeError: File ~/sage/src/sage/interfaces/interface.py:334, in Interface._coerce_from_special_method(self, x) 332 s = '_gp_' 333 try: --> 334 return (x.__getattribute__(s))(self) 335 except AttributeError: 336 return self(x._interface_init_()) File ~/sage/src/sage/structure/sage_object.pyx:793, in sage.structure.sage_object.SageObject._fricas_() 791 import sage.interfaces.fricas 792 G = sage.interfaces.fricas.fricas --> 793 return self._interface_(G) 794 795 def _fricas_init_(self): File ~/sage/src/sage/structure/sage_object.pyx:723, in sage.structure.sage_object.SageObject._interface_() 721 except Exception: 722 raise NotImplementedError("coercion of object %s to %s not implemented" % (repr(self), I)) --> 723 X = I(s) 724 if c: 725 try: File ~/sage/src/sage/interfaces/interface.py:299, in Interface.__call__(self, x, name) 296 pass 298 if isinstance(x, str): --> 299 return cls(self, x, name=name) 300 try: 301 # Special methods do not and should not have an option to 302 # set the name directly, as the identifier assigned by the 303 # interface should stay consistent. An identifier with a 304 # user-assigned name might change its value, so we return a 305 # new element. 306 result = self._coerce_from_special_method(x) File ~/sage/src/sage/interfaces/expect.py:1524, in ExpectElement.__init__(self, parent, value, is_name, name) 1522 except (RuntimeError, ValueError) as x: 1523 self._session_number = -1 -> 1524 raise TypeError(*x.args) 1525 except BaseException: 1526 self._session_number = -1 TypeError: An error occurred when FriCAS evaluated '3': Function declaration sageprint : InputForm -> String has been added to workspace. sage: fricas(3) <repr(<sage.interfaces.fricas.FriCASElement at 0x73b6eae59350>) failed: AttributeError: 'NoneType' object has no attribute 'rstrip'> sage: fricas(3) <repr(<sage.interfaces.fricas.FriCASElement at 0x73b6ea563610>) failed: AttributeError: 'NoneType' object has no attribute 'rstrip'> sage: fricas(3) <repr(<sage.interfaces.fricas.FriCASElement at 0x73b6eaa090d0>) failed: RuntimeError: An error occurred when FriCAS evaluated 'sage3': There are no library operations named category_for Use HyperDoc Browse or issue )what op category_for to learn if there is any operation containing " category_for " in its name. Cannot find a definition or applicable library operation named category_for with argument type(s) PositiveInteger Perhaps you should use "@" to indicate the required return type, or "$" to specify which version of the function you need.>