Modernize Python 2 code to get ready for Python 3

Project Euler/Problem 02/sol1.py

@@ -6,6 +6,12 @@ the first 10 terms will be:
 By considering the terms in the Fibonacci sequence whose values do not exceed n, find the sum of the even-valued terms.
 e.g. for n=10, we have {2,8}, sum is 10.
 '''
+from __future__ import print_function
+
+try:
+    raw_input          # Python 2
+except NameError:
+    raw_input = input  # Python 3
 
 n = int(raw_input().strip())
 i=1; j=2; sum=0
@@ -15,4 +21,4 @@ while(j<=n):
     temp=i
     i=j
     j=temp+i
-print sum
+print(sum)