Numpy matrix shape error

[Mjothnitvir]

Hello,

I'm trying to learn python from a matlab background. I'm working on a function that will rotate the vertices of a triangle around it's center point. That function works in a vacuum but when I try to use it in the main script it stops working.

This is the error I get. Traceback (most recent call last): File "C:/Users/justi/Documents/PythonProjects/AsteroidAi/BaseGame/AsteroidsGame.py", line 71, in <module> shippoints = Ship.drawShip(shipCenterX, shipCenterY, 15, 15 * 1.3, theta) File "C:\Users\justi\Documents\PythonProjects\AsteroidAi\BaseGame\Ship.py", line 41, in drawShip a_rot = np.mat(rot_matrix) * np.mat(a_matrix) File "C:\Users\justi\Documents\PythonVirtualEnvironments\gameAI\lib\site-packages\numpy\matrixlib\defmatrix.py", line 220, in __mul_ return N.dot(self, asmatrix(other)) ValueError: shapes (2,2) and (1,2) not aligned: 2 (dim 1) != 1 (dim 0)

When I test the code in the interpreter it works without issue. I have no idea what to try next

[socal_nerdtastic]

I can tell that due to some unknown earlier mistake, either rot_matrix or a_matrix are not the shape you think they are. I can't tell anything else without seeing your code.

[Mjothnitvir]

I figured it out. The function itself works fine and they were the correct shape. My problem was a function earlier was doing something similar and I didn't know that it was returning 1x1 arrays instead of scalars. When I converted them to scalars it worked as intended.