使用零((n，n))时的符号"not all arguments converted during string formatting"

Question

我在外部计算机上运行sympy，但是当我执行简单命令

时

M=sympy.zeros((2,2))

我得到错误

 Traceback (most recent call last):
  File "test.py", line 8, in <module>
    M=sp.zeros((2,2))
  File "/apps/brussel/magnycours/software/sympy/0.7.6-intel-2015a-Python-2.7.9/lib/python2.7/site-packages/sympy/matrices/dense.py", line 1229, in zeros
    return cls.zeros(r, c)
  File "/apps/brussel/magnycours/software/sympy/0.7.6-intel-2015a-Python-2.7.9/lib/python2.7/site-packages/sympy/matrices/dense.py", line 513, in zeros
    r = as_int(r)
  File "/apps/brussel/magnycours/software/sympy/0.7.6-intel-2015a-Python-2.7.9/lib/python2.7/site-packages/sympy/core/compatibility.py", line 389, in as_int
    raise ValueError('%s is not an integer' % n)
TypeError: not all arguments converted during string formatting

但是，当我在自己的计算机上运行它时，没有问题。我该如何解决？

我的计算机上的版本为0.7.1.rc1，而群集上的版本为0.7.6。我应该要求他们安装（较旧的？）版本还是更轻松的修复？

Answer 1

如果您想要带有零的2x2矩阵，请尝试以下操作：

In [6]: zeros(2,2)
Out[6]: 
Matrix([
[0, 0],
[0, 0]])

或

In [7]: zeros(2)
Out[7]: 
Matrix([
[0, 0],
[0, 0]])