Python solution for rotate matrix by 90 in anticlockwise

Author: dsrao711

DSA 450 GFG/rotate_by_90.py

@@ -0,0 +1,45 @@
+
+
+#https://practice.geeksforgeeks.org/problems/rotate-by-90-degree0356/1/?company[]=Morgan%20Stanley&company[]=Morgan%20Stanley&page=1&query=company[]Morgan%20Stanleypage1company[]Morgan%20Stanley
+
+
+def rotate(a): 
+    #code here
+    
+    n = len(a)
+    
+    # Transpose
+    for i in range(n):
+        for j in range(i):
+            a[i][j] , a[j][i] = a[j][i] , a[i][j]
+            
+    # Rotate the rows
+    
+    for i in range(int(n/2)):
+        a[i] , a[n-i-1] = a[n-i-1] , a[i]
+    
+    return a
+
+#{ 
+#  Driver Code Starts
+#Initial Template for Python 3
+
+
+if __name__ == '__main__':
+    t = int(input())
+    for _ in range(t):
+        N=int(input())
+        arr=[int(x) for x in input().split()]
+        matrix=[]
+
+        for i in range(0,N*N,N):
+            matrix.append(arr[i:i+N])
+
+        rotate(matrix)
+        for i in range(N): 
+            for j in range(N): 
+                print(matrix[i][j], end =' ') 
+            print() 
+        
+
+# } Driver Code Ends