add method Matrix

QElephant/Matrix.py

@@ -43,6 +43,13 @@ class Matrix:
     def __str__(self) -> str:
         return str(self.__m)
     
+    @staticmethod
+    def to_list(matrix: "Matrix") -> list[list[complex]]:
+        if type(matrix) is not Matrix:
+            raise ValueError(f"cannot multiply Matrix with {type(matrix)}")
+        
+        return matrix._Matrix__m.copy()
+
     @staticmethod
     def I() -> "Matrix":
         return Matrix([

docs/Matrix.md

@@ -35,6 +35,10 @@ Matrix(l: list[list[complexe]])
 
 ### Staticmethods
 
+- ```to_list(matrix: Matrix) -> list[list[complex]]```
+
+  returns the a list representing the given Matrix.
+
 - ```I() -> Matrix```
 
   returns the matrix