python - IJulia 与 SymPy 不工作

Question

IJulia symbolitc 数学无法与 SymPy 和 PyCall 一起使用，如 http://mth229.github.io/symbolic.html 中所述。 .

示例:

using SymPy
x = Sym("x")

产生以下错误消息:

PyError (PyImport_ImportModule) <type 'exceptions.TypeError'>
TypeError("unsupported operand type(s) for +: 'NoneType' and 'NoneType'",)
  File "C:\PYTHON27\lib\site-packages\sympy\__init__.py", line 35, in <module>
    from .polys import *
  File "C:\PYTHON27\lib\site-packages\sympy\polys\__init__.py", line 5, in <module>
    from . import polytools
  File "C:\PYTHON27\lib\site-packages\sympy\polys\polytools.py", line 52, in <module>
    from sympy.polys.domains import FF, QQ
  File "C:\PYTHON27\lib\site-packages\sympy\polys\domains\__init__.py", line 9, in <module>
    from . import finitefield
  File "C:\PYTHON27\lib\site-packages\sympy\polys\domains\finitefield.py", line 7, in <module>
    from sympy.polys.domains.groundtypes import SymPyInteger
  File "C:\PYTHON27\lib\site-packages\sympy\polys\domains\groundtypes.py", line 13, in <module>
    from .pythonrational import PythonRational
  File "C:\PYTHON27\lib\site-packages\sympy\polys\domains\pythonrational.py", line 12, in <module>
    from sympy.printing.defaults import DefaultPrinting
  File "C:\PYTHON27\lib\site-packages\sympy\printing\__init__.py", line 3, in <module>
    from .pretty import pager_print, pretty, pretty_print, pprint, \
  File "C:\PYTHON27\lib\site-packages\sympy\printing\pretty\__init__.py", line 3, in <module>
    from .pretty import (pretty, pretty_print, pprint, pprint_use_unicode,
  File "C:\PYTHON27\lib\site-packages\sympy\printing\pretty\pretty.py", line 14, in <module>
    from .stringpict import prettyForm, stringPict
  File "C:\PYTHON27\lib\site-packages\sympy\printing\pretty\stringpict.py", line 17, in <module>
    from .pretty_symbology import hobj, vobj, xsym, xobj, pretty_use_unicode
  File "C:\PYTHON27\lib\site-packages\sympy\printing\pretty\pretty_symbology.py", line 426, in <module>
    '-->': ('-->', U('EM DASH') + U('EM DASH') +

while loading C:\Users\eugenio\.julia\v0.3\SymPy\src\SymPy.jl, in expression starting on line 761
while loading In[2], in expression starting on line 1

 in pyerr_check at C:\Users\eugenio\.julia\v0.3\PyCall\src\exception.jl:58
 in pyimport at C:\Users\eugenio\.julia\v0.3\PyCall\src\PyCall.jl:85
 in include at boot.jl:245
 in include_from_node1 at loading.jl:128
 in reload_path at loading.jl:152
 in _require at loading.jl:67
 in require at loading.jl:51

设置:
- Windwos 8.1，64位
- 安装了 Anaconda Python(...它如何与 PythonXY 或 C:\Python27 上的 Python 2.7 一起工作？)
- Julia 诗句0.3.1
- PyCall 版本。 0.4.9
- SymPy 版本。 0.2.19

Answer 1

这看起来像是 SymPy(Python 库，而不是 Julia 库)中的一个错误，我已在 https://github.com/sympy/sympy/issues/8163 打开它。 。

如果您无法在 Python 中导入 unicodedata，似乎可能会出现此问题。您可以直接在 Python 中或使用 PyCall 运行 import unicodedata 吗？