From 442ca575b029c244e7307b502b63d11611dc205b Mon Sep 17 00:00:00 2001
From: Michael Orlitzky <michael@orlitzky.com>
Date: Thu, 1 Nov 2018 15:10:20 -0400
Subject: [PATCH] mjo/interpolation.py: allow tests to run with PYTHONPATH=".".

---
 mjo/interpolation.py | 34 +++++++++++++++++++++++++++++++---
 1 file changed, 31 insertions(+), 3 deletions(-)

diff --git a/mjo/interpolation.py b/mjo/interpolation.py
index 4be95e2..dc06107 100644
--- a/mjo/interpolation.py
+++ b/mjo/interpolation.py
@@ -44,6 +44,10 @@ def lagrange_coefficient(k, x, xs):
 
     A symbolic expression of one variable.
 
+    SETUP::
+
+        sage: from mjo.interpolation import lagrange_coefficient
+
     TESTS::
 
         sage: xs = [ -pi/2, -pi/6, 0, pi/6, pi/2 ]
@@ -75,6 +79,10 @@ def lagrange_polynomial(x, xs, ys):
 
     A symbolic expression (polynomial) interpolating each (xs[k], ys[k]).
 
+    SETUP::
+
+        sage: from mjo.interpolation import lagrange_polynomial
+
     TESTS::
 
         sage: xs = [ -pi/2, -pi/6, 0, pi/6, pi/2 ]
@@ -111,6 +119,10 @@ def lagrange_interpolate(f, x, xs):
 
     A polynomial in ``x`` which interpolates ``f`` at ``xs``.
 
+    SETUP::
+
+        sage: from mjo.interpolation import lagrange_interpolate
+
     EXAMPLES:
 
     We're exact on polynomials of degree `n` if we use `n+1` points::
@@ -135,7 +147,11 @@ def divided_difference_coefficients(xs):
     Assuming some function `f`, compute the coefficients of the
     divided difference f[xs[0], ..., xs[n]].
 
-    TESTS:
+    SETUP::
+
+        sage: from mjo.interpolation import divided_difference_coefficients
+
+    TESTS::
 
         sage: divided_difference_coefficients([0])
         [1]
@@ -166,6 +182,10 @@ def divided_difference(xs, ys):
 
     The (possibly symbolic) divided difference function.
 
+    SETUP::
+
+        sage: from mjo.interpolation import divided_difference
+
     TESTS::
 
         sage: xs = [0]
@@ -215,7 +235,11 @@ def newton_polynomial(x, xs, ys):
 
     A symbolic expression.
 
-    TESTS:
+    SETUP::
+
+        sage: from mjo.interpolation import lagrange_polynomial, newton_polynomial
+
+    TESTS::
 
         sage: xs = [ -pi/2, -pi/6, 0, pi/6, pi/2 ]
         sage: ys = map(sin, xs)
@@ -304,7 +328,11 @@ def hermite_interpolant(x, xs, ys, y_primes):
 
     A symbolic expression.
 
-    TESTS:
+    SETUP::
+
+        sage: from mjo.interpolation import hermite_interpolant
+
+    TESTS::
 
         sage: xs = [ 0, pi/6, pi/2 ]
         sage: ys = map(sin, xs)
-- 
2.43.2