code: def checkSymmetry(A):
      ADim = A.shape
      if ADim[0] != ADim[1]:
          raise matrixErrors("The matrix is not symmetric!")
  
file_path: pydlm/pydlm/base/tools.py
imports: import math
label_desc: Use image node_id 3 for calling the checker obj's underlying member method code with example usage: obj.checkSymmetry(A) without return types