Question

我首先使用以下方法从源代码构建Octave：

$brew install --build-from-source octave

然后我使用以下方法在八度音程内安装了符号包：

$pkg install -forge symbolic

之后我做了：

$pkg load symbolic

在使用syms函数时，它给出了一个没有安装Sympy的ImportError。所以，我用：

安装了Sympy

$sudo pip install --user sympy

之后我再次尝试使用syms，现在它出现了这个错误：

 Traceback (most recent call last):
 File "<string>", line 1, in <module>
 File "/Library/Python/2.7/site-packages/sympy/__init__.py", line 20, in <module>
 raise ImportError("SymPy now depends on mpmath as an external library. "
 ImportError: SymPy now depends on mpmath as an external library. See 
 http://docs.sympy.org/latest/install.html#mpmath for more information.
 OctSymPy v2.5.0: this is free software without warranty, see source.
 Initializing communication with SymPy using a popen2() pipe.
 error: Python cannot import SymPy: have you installed SymPy?
 error: called from
 assert_have_python_and_sympy at line 37 column 5
 python_ipc_popen2 at line 78 column 5
 python_ipc_driver at line 58 column 13
 python_cmd at line 164 column 9
 valid_sym_assumptions at line 38 column 10
 assumptions at line 82 column 7
 syms at line 97 column 13

请告诉我如何解决这个问题操作系统：macOS Sierra 10.12.4
GNU Octave，版本4.2.1

Answer 1

通过首先使用：

卸载mpmath和sympy来解决此问题

$brew uninstall sympy
$brew uninstall mpmath

然后重新安装它们：

$pip install --user mpmath
$pip install --user sympy

现在一切正常！

Octave：使用符号包

1 个答案: