Traceback (most recent call last):


 "<stdin>", line 1, in <module>
AttributeError: 'MatrixSymbol' object has no attribute 'inv'

Traceback (most recent call last):


 "C:\Users\91901\anaconda3\envs\tf_1\lib\site-packages\IPython\core\interactiveshell.py", line 2044, in showtraceback

stb = value._render_traceback_()
AttributeError: 'TypeError' object has no attribute '_render_traceback_'
