mjo/interpolation.py: wrap map() calls in list() for python-3.x.

There's probably a better way to implement these functions for
python-3.x, but this fixes the tests for now.

diff --git a/mjo/interpolation.py b/mjo/interpolation.py
index 25fb11f75f7944e678ba37fb422d9e9b7d70881a..6e0ecb3d79c5129a2e6270177b648142085786d1 100644 (file)
--- a/mjo/interpolation.py
+++ b/mjo/interpolation.py
@@ -86,7 +86,7 @@ def lagrange_polynomial(x, xs, ys):
     TESTS::
 
         sage: xs = [ -pi/2, -pi/6, 0, pi/6, pi/2 ]
-        sage: ys = map(sin, xs)
+        sage: ys = list(map(sin, xs))
         sage: L = lagrange_polynomial(x, xs, ys)
         sage: expected  = 27/16*(pi - 6*x)*(pi - 2*x)*(pi + 2*x)*x/pi^4
         sage: expected -= 1/8*(pi - 6*x)*(pi - 2*x)*(pi + 6*x)*x/pi^4
@@ -187,15 +187,15 @@ def divided_difference(xs, ys):
     TESTS::
 
         sage: xs = [0]
-        sage: ys = map(sin, xs)
+        sage: ys = list(map(sin, xs))
         sage: divided_difference(xs, ys)
         0
         sage: xs = [0, pi]
-        sage: ys = map(sin, xs)
+        sage: ys = list(map(sin, xs))
         sage: divided_difference(xs, ys)
         0
         sage: xs = [0, pi, 2*pi]
-        sage: ys = map(sin, xs)
+        sage: ys = list(map(sin, xs))
         sage: divided_difference(xs, ys)
         0
 
@@ -240,7 +240,7 @@ def newton_polynomial(x, xs, ys):
     TESTS::
 
         sage: xs = [ -pi/2, -pi/6, 0, pi/6, pi/2 ]
-        sage: ys = map(sin, xs)
+        sage: ys = list(map(sin, xs))
         sage: L = lagrange_polynomial(x, xs, ys)
         sage: N = newton_polynomial(x, xs, ys)
         sage: bool(N == L)
@@ -325,8 +325,8 @@ def hermite_interpolant(x, xs, ys, y_primes):
     TESTS::
 
         sage: xs = [ 0, pi/6, pi/2 ]
-        sage: ys = map(sin, xs)
-        sage: y_primes = map(cos, xs)
+        sage: ys = list(map(sin, xs))
+        sage: y_primes = list(map(cos, xs))
         sage: H = hermite_interpolant(x, xs, ys, y_primes)
         sage: expected  = -27/4*(pi - 6*x)*(pi - 2*x)^2*sqrt(3)*x^2/pi^4
         sage: expected += (5*(pi - 2*x)/pi + 1)*(pi - 6*x)^2*x^2/pi^4