806: Improve code style

mrocklin · Apr 25, 2013 · 87f6baf · 87f6baf
1 parent 68c77bf
commit 87f6baf
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Showing 2 changed files with 10 additions and 6 deletions.
diff --git a/sympy/functions/special/hyper.py b/sympy/functions/special/hyper.py
@@ -195,10 +195,11 @@ def _eval_expand_func(self, **hints):
     def _eval_rewrite_as_Sum(self, ap, bq, z):
         from sympy.functions import factorial, RisingFactorial, Piecewise
         n = C.Dummy("n", integer=True)
-        rfap = Tuple(*[RisingFactorial(a,n) for a in ap])
-        rfbq = Tuple(*[RisingFactorial(b,n) for b in bq])
-        coeff = Mul(*rfap)/Mul(*rfbq)
-        return Piecewise( (C.Sum(coeff * z**n/factorial(n), (n, 0, oo)), self.convergence_statement), (self, True) )
+        rfap = Tuple(*[RisingFactorial(a, n) for a in ap])
+        rfbq = Tuple(*[RisingFactorial(b, n) for b in bq])
+        coeff = Mul(*rfap) / Mul(*rfbq)
+        return Piecewise((C.Sum(coeff * z**n / factorial(n), (n, 0, oo)),
+                         self.convergence_statement), (self, True))
 
     @property
     def argument(self):

diff --git a/sympy/functions/special/tests/test_hyper.py b/sympy/functions/special/tests/test_hyper.py
@@ -77,9 +77,12 @@ def replace_dummy(expr, sym):
 def test_hyper_rewrite_sum():
     from sympy import RisingFactorial, factorial, Dummy, Sum
     _k = Dummy("k")
-    assert replace_dummy(hyper((1,2),(1,3),x).rewrite(Sum),_k) == Sum(x**_k/factorial(_k)*RisingFactorial(2,_k)/RisingFactorial(3,_k), (_k, 0, oo))
+    assert replace_dummy(hyper((1, 2), (1, 3), x).rewrite(Sum), _k) == \
+        Sum(x**_k / factorial(_k) * RisingFactorial(2, _k) /
+            RisingFactorial(3, _k), (_k, 0, oo))
 
-    assert hyper((1,2,3),(-1,3),z).rewrite(Sum) == hyper((1,2,3),(-1,3),z)
+    assert hyper((1, 2, 3), (-1, 3), z).rewrite(Sum) == \
+        hyper((1, 2, 3), (-1, 3), z)
 
 
 def test_radius_of_convergence():