updates

slides/01_intro_python.md

@@ -126,7 +126,7 @@ See the different versions of the same page in the following
 	 print(myA[2])                           # 11   access 3. element
 	 myA[0] = 12                             # set 1. element to 12
 	 myB = np.array([[1,5],[7,9]])           # create  rank 2 array
-	 myB.shape                               # (2,2)
+	 myB.shape                               # (2,2) (rows,columns)
 	 print(myB[0,0],myB[0,1],myB[1,1])       # 1 5 9
 	 myC = np.arange(6)                      # create rank 1 set to 0 - 5
 	 myC.reshape(2,3)                        # change rank to (2,3)