sympy/sympy — pull request #1302 by Krastanov (2012-05-16 21:25:38+00:00)
Title: Create the msympify function in order to sympify matrices.

Add a msympify function that transforms iterables into matrices and
use it in all the __mul__ & co. methods of Matrix.

The following is now possible:

```
msympify([x,y]) == Matrix([x,y])
msympify([[x,y],]) == Matrix([[x,y],])

msympify(Matrix([1,2])) == Matrix([1,2])

Matrix([[1,2],[3,4]]) * [1,2]
Matrix([[1,2],[3,4]]) * [[1,2],[3,4]]
[[1,2],] * Matrix([[1,2],[3,4]])
Matrix([1,2]) + [1,2]
```