Moved problems till e045.py to Python 2.

python/e044.py

@@ -0,0 +1,20 @@
+def pentagonal(n):
+    return n * (3 * n - 1) // 2
+
+
+def euler_044():
+    n = 10000
+    p = [pentagonal(n) for n in range(1, n)]
+    p_set = set(p)
+    for i in range(1, n):
+        for j in range(i + 1, n):
+            if p[i - 1] + p[j - 1] in p_set and p[j - 1] - p[i - 1] in p_set:
+                d = pentagonal(j) - pentagonal(i)
+                s = d
+                # print("i = {}, j = {}, d = {}.".format(i, j, d))
+    return s
+
+
+if __name__ == "__main__":
+    print("e044.py: " + str(euler_044()))
+    assert(euler_044() == 5482660)