无法从sage-python导入sage.finance。

Question

在运行sage时，我可以毫无问题地导入sage.finance。但是，在运行sage -python (或sage -ipython)时，导入sage.finance会带来以下跟踪：

>>> import sage.finance 
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>                                                                                                                      
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/sage/finance/__init__.py", line 3, in <module>
    import all          
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/sage/finance/all.py", line 1, in <module>
    from stock import Stock
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/sage/finance/stock.py", line 20, in <module>
    from sage.structure.all import Sequence
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/sage/structure/all.py", line 1, in <module>
    from factorization import Factorization
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/sage/structure/factorization.py", line 187, in <module>
    from sage.rings.integer import Integer
  File "integer.pyx", line 1, in init sage.rings.integer (sage/rings/integer.c:38248)
  File "morphism.pyx", line 1, in init sage.categories.morphism (sage/categories/morphism.c:7490)
  File "map.pyx", line 1, in init sage.categories.map (sage/categories/map.c:8604)
  File "parent.pxd", line 12, in init sage.structure.element (sage/structure/element.c:31286)
  File "map.pxd", line 4, in init sage.structure.parent (sage/structure/parent.c:24406)
AttributeError: 'module' object has no attribute 'Map'

是否知道什么会导致此错误，以及如何从sage -python内部导入财务模块？

Answer 1

我不认为您可以直接导入东西，但只能从sage.all导入，而不是在shell中。鼠尾草进口了很多东西。尝尝这个。

$ sage -ipython
Python 2.7.5 (default, Oct  7 2013, 07:44:02) 
Type "copyright", "credits" or "license" for more information.

IPython 0.13.2 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]: from sage.all import finance

In [2]: finance.[tab]
finance.MarkovSwitchingMultifractal
finance.Stock
finance.TimeSeries
finance.autoregressive_fit
finance.black_scholes
finance.fractional_brownian_motion_simulation
finance.fractional_gaussian_noise_simulation
finance.lazy_import
finance.multifractal_cascade_random_walk_simulation
finance.stationary_gaussian_simulation