class matrix example

python-temel/class.matrix.py

@@ -0,0 +1,34 @@
+class Matrix:
+    def __init__(self, nrows, ncols):
+        self.matrix = [[0] * ncols for i in range(nrows)]
+
+    def __getitem__(self, index):
+        return self.matrix[index[0]][index[1]]
+
+    def __setitem__(self, index, val):
+        self.matrix[index[0]][index[1]] = val
+
+    def __str__(self):
+        s = ''
+        for i in range(len(self.matrix)):
+            for k in range(len(self.matrix[0])):
+                if k != 0:
+                    s += ' '
+                s += str(self.matrix[i][k])
+            s += '\n'
+
+        return s
+
+m = Matrix(5, 5)
+
+for i in range(5):
+    for k in range(5):
+        m[i, k] = i + k
+
+for i in range(5):
+    for k in range(5):
+        print(m[i, k], end=' ')
+    print()
+
+print()
+print(m)