convert all of them to python3

bst.py

@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python3
 
 from random import randint
 from pprint import PrettyPrinter
@@ -18,7 +18,7 @@ class Branch:
         return "(%s) %s (%s)" % (repr(self.left), self.value, repr(self.right))
 
 def split(xs):
-    l = len(xs) / 2
+    l = int(len(xs) / 2)
     return (xs[0:l], xs[l], xs[l+1:])
 
 def bst(xs):
@@ -33,7 +33,6 @@ def makeBST(xs):
 def findBST(tree, x):
     if tree is None:
         return None
-    print tree.value
     if tree.value == x:
         return tree
     if x < tree.value:
@@ -43,6 +42,6 @@ def findBST(tree, x):
 
 test = [randint(1,50) for _ in range(20)]
 
-print test
-print "finding %s" % test[4]
-print findBST(makeBST(test), test[4])
+print(test)
+print("finding %s" % test[4])
+print(findBST(makeBST(test), test[4]))

intersection.py

@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python3
 
 # find the intersection of two lists including duplicate values
 
@@ -15,9 +15,9 @@ def intersection(xs, ys):
     freqs2 = frequencies(ys)
 
     intersection = []
-    for k, v in freqs1.iteritems():
+    for k, v in freqs1.items():
         n = min(v, freqs2[k])
-        intersection.extend([k for _ in xrange(n)])
+        intersection.extend([k for _ in range(n)])
     return intersection
 
-print intersection([1,4,2,6,10,4,4], [7,4,9,10,20,4,10])
+print(intersection([1,4,2,6,10,4,4], [7,4,9,10,20,4,10]))

palindrome.py

@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python3
 
 # check if a word is palindromic without reversing it
 
@@ -16,4 +16,4 @@ def isPalindrome(word):
         end -= 1
     return retval
 
-print isPalindrome("wwaabbaawwz")
+print(isPalindrome("wwaabbaawwz"))

pascal.py

@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python3
 
 # find the rows of pascal's triangle
 
@@ -8,7 +8,7 @@ def choose(n, k):
     return choose(n, k-1) * (n-k) / k
 
 def pascal(n):
-    return [choose(n, i) for i in xrange(0, n)]
+    return [choose(n, i) for i in range(0, n)]
 
-for i in xrange(1, 11):
-    print pascal(i)
+for i in range(1, 11):
+    print(pascal(i))

phone.py

@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python3
 
 # find all possible permutations of a sequence of phone pad digits (other than 1 and 0)
 
@@ -34,4 +34,4 @@ def numToWords(num):
     return genAll(lettersets)[0]
 
 for num in numToWords("353346"):
-    print num
+    print(num)

regions.py

@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python3
 
 # counts the number of regions in a matrix
 # vertically and horizontally connected
@@ -56,4 +56,4 @@ for y, row in enumerate(testregion):
             count += 1
         exploreField(testregion, x, y)
 
-print count
+print(count)