diff --git a/vector.py b/vector.py
index 7f0b96c..1d4a943 100644
--- a/vector.py
+++ b/vector.py
@@ -1,5 +1,6 @@
 # -*- coding: iso-8859-15 -*
 from math import sqrt
+import pdb
 
 class Vector(object):
     def __init__(self, coordinates):
@@ -42,32 +43,33 @@ class Vector(object):
     	return Vector(new_coordinates)
     	
     def magnitude(self): 
-   	#Länge
-   	coordinates_squared = [x**2 for x in self.coordinates]
-   	return sqrt(sum(coordinates_squared))
+        	#Länge
+        coordinates_squared = [x**2 for x in self.coordinates]
+        pdb.set_trace()
+        return sqrt(sum(coordinates_squared))
    	
     def normalized(self):
-    	try:
-    		magnitude = self.magnitude()
-    		return self.times_scalar(1./magnitude)
+        try:
+            magnitude = self.magnitude()
+            return self.times_scalar(1./magnitude)
         except ZeroDivisonError:
             raise Exception('Ein Null-Vektor kann nicht normalisiert werden')
 
 # Tests
 
 vektor_1 = Vector([1,2,3])
-print vektor_1
+print (vektor_1)
 
 vektor_2 = Vector([1,2,3])
 vektor_3 = Vector([-1,2,3])
 
-print vektor_1 == vektor_2
-print vektor_2 == vektor_3 
+print (vektor_1 == vektor_2)
+print (vektor_2 == vektor_3) 
 
-print vektor_1.plus(vektor_2)
+print (vektor_1.plus(vektor_2))
 
-print vektor_2.minus(vektor_3)
+print (vektor_2.minus(vektor_3))
 
-print vektor_3.times_scalar(3)
+print (vektor_3.times_scalar(3))
 
-print "Magnitude -- Länge ", vektor_3.magnitude()
\ No newline at end of file
+print ("Magnitude -- Länge ", vektor_3.magnitude())
\ No newline at end of file