⚡ Improve some code regarding zero matrix (#4)

* ⚡ Improved code regarding zero matrix

* ✅ Added more tests regarding zero matrix

* 🔖 Bumped the version

matops/__init__.py

@@ -1,5 +1,5 @@
 """Matrix Operations"""
 
-__version__ = "0.1.1"
+__version__ = "0.1.2"
 
 from .matrix import Matrix

matops/matrix.py

@@ -30,7 +30,6 @@ def __sub__(self, other: "Matrix") -> "Matrix":
     def __mul__(self, other: Union["Matrix", Number]) -> "Matrix":
         if isinstance(other, (int, float)):
             temp = self._get_zero_matrix()
-            temp = [[0 for _ in range(self.num_cols)] for _ in range(self.num_rows)]
             for i in range(self.num_rows):
                 for j in range(self.num_cols):
                     temp[i][j] = self.rows[i][j] * other
@@ -103,9 +102,7 @@ def is_square_matrix(self) -> bool:
         return self.num_rows == self.num_cols
 
     def is_zero_matrix(self) -> bool:
-        return [
-            [0 for _ in range(self.num_cols)] for _ in range(self.num_rows)
-        ] == self.rows
+        return self._get_zero_matrix() == self.rows
 
     def is_symmetric_matrix(self) -> bool:
         return self == self.transpose()

tests/test_matrix.py

@@ -337,6 +337,16 @@ def test_zero_matrix_1():
 
 
 def test_zero_matrix_2():
+    m = Matrix(
+        [
+            [0],
+            [0],
+        ]
+    )
+    assert m.is_zero_matrix()
+
+
+def test_zero_matrix_3():
     m = Matrix(
         [
             [1, 0],