On Sat, Sep 11, 2021 at 6:58 AM zp liu <[email protected]> wrote:
>
> Hola,all!
> When I use the function solve(),an error occur and I fail to find solutions.
> Needing help!
> CODE:
> solve(x,x)
>
I get
sage: solve(x,x)
[x == 0]
sage: version()
'SageMath version 9.3.rc0, Release Date: 2021-03-23'
> OUT:
> UnicodeEncodeError Traceback (most recent call last)
> <ipython-input-1-6e1b29585f6f> in <module> ----> 1 solve(x,x)
> /opt/sagemath-9.3/local/lib/python3.7/site-packages/sage/symbolic/relation.py
> in solve(f, *args, **kwds) 1041 1042 if is_Expression(f): # f is a single
> expression -> 1043 return _solve_expression(f, x, explicit_solutions,
> multiplicities, to_poly_solve, solution_dict, algorithm, domain) 1044 1045 if
> not isinstance(f, (list, tuple)):
> /opt/sagemath-9.3/local/lib/python3.7/site-packages/sage/symbolic/relation.py
> in _solve_expression(f, x, explicit_solutions, multiplicities, to_poly_solve,
> solution_dict, algorithm, domain) 1280 1281 # from here on, maxima is used
> for solution -> 1282 m = ex._maxima_() 1283 P = m.parent() 1284 if
> explicit_solutions:
> /opt/sagemath-9.3/local/lib/python3.7/site-packages/sage/symbolic/expression.pyx
> in sage.symbolic.expression.Expression._maxima_
> (build/cythonized/sage/symbolic/expression.cpp:7963)() 1020 # Maybe not such
> a great idea because the "default" interface is another one 1021 from
> sage.calculus.calculus import maxima -> 1022 return super(Expression,
> self)._interface_(maxima) 1023 else: 1024 return super(Expression,
> self)._interface_(session)
> /opt/sagemath-9.3/local/lib/python3.7/site-packages/sage/structure/sage_object.pyx
> in sage.structure.sage_object.SageObject._interface_
> (build/cythonized/sage/structure/sage_object.c:5480)() 678 except (KeyError,
> ValueError): 679 pass --> 680 nm = I.name() 681 init_func = getattr(self,
> '_%s_init_' % nm, None) 682 if init_func is not None:
> /opt/sagemath-9.3/local/lib/python3.7/site-packages/sage/misc/lazy_import.pyx
> in sage.misc.lazy_import.LazyImport.__getattr__
> (build/cythonized/sage/misc/lazy_import.c:3876)() 326 True 327 """ --> 328
> return getattr(self.get_object(), attr) 329 330 # We need to wrap all the
> slot methods, as they are not forwarded
> /opt/sagemath-9.3/local/lib/python3.7/site-packages/sage/misc/lazy_import.pyx
> in sage.misc.lazy_import.LazyImport.get_object
> (build/cythonized/sage/misc/lazy_import.c:2436)() 188 if likely(self._object
> is not None): 189 return self._object --> 190 return self._get_object() 191
> 192 cpdef _get_object(self):
> /opt/sagemath-9.3/local/lib/python3.7/site-packages/sage/misc/lazy_import.pyx
> in sage.misc.lazy_import.LazyImport._get_object
> (build/cythonized/sage/misc/lazy_import.c:2710)() 221 print(f"Option
> ``at_startup=True`` for lazy import {self._name} not needed anymore") 222
> try: --> 223 self._object = getattr(__import__(self._module, {}, {},
> [self._name]), self._name) 224 except ImportError as e: 225 if self._feature:
> /opt/sagemath-9.3/local/lib/python3.7/site-packages/sage/interfaces/maxima_lib.py
> in <module> 88 from sage.symbolic.ring import SR 89 ---> 90 from
> sage.libs.ecl import EclObject, ecl_eval 91 92 from .maxima_abstract import
> (MaximaAbstract, MaximaAbstractFunction,
> /opt/sagemath-9.3/local/lib/python3.7/site-packages/sage/libs/ecl.pyx in init
> sage.libs.ecl (build/cythonized/sage/libs/ecl.c:13899)() 1398 return
> ecl_wrap(o) 1399 -> 1400 init_ecl()
> /opt/sagemath-9.3/local/lib/python3.7/site-packages/sage/libs/ecl.pyx in
> sage.libs.ecl.init_ecl (build/cythonized/sage/libs/ecl.c:5084)() 280 (setf
> (logical-pathname-translations "TMP") 281 '(("**;*.*" "%s/**/*.*"))) --> 282
> """ % str_to_bytes(str(ECL_TMP)))) 283 284 # We define our own error catching
> eval, apply and funcall/
> /opt/sagemath-9.3/local/lib/python3.7/site-packages/sage/cpython/string.pxd
> in sage.cpython.string.str_to_bytes
> (build/cythonized/sage/libs/ecl.c:11601)() 75 if isinstance(s, bytes): 76
> return s ---> 77 return _str_to_bytes(s, encoding, errors)
> UnicodeEncodeError: 'utf-8' codec can't encode characters in position 26-27:
> surrogates not allowed
>
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