STY: Code cleanup in polynomial [*]fromroots functions.

Use divmod instead of // and % separately.

6 files changed, 18 insertions, 18 deletions

diff --git a/numpy/polynomial/chebyshev.py b/numpy/polynomial/chebyshev.py
index 9645ae770..e32cb229a 100644
--- a/numpy/polynomial/chebyshev.py
+++ b/numpy/polynomial/chebyshev.py
@@ -526,12 +526,12 @@ def chebfromroots(roots) :
     else :
         [roots] = pu.as_series([roots], trim=False)
         roots.sort()
-        n = len(roots)
         p = [chebline(-r, 1) for r in roots]
+        n = len(p)
         while n > 1:
-            m = n//2
+            m, r = divmod(n, 2)
             tmp = [chebmul(p[i], p[i+m]) for i in range(m)]
-            if n%2:
+            if r:
                 tmp[0] = chebmul(tmp[0], p[-1])
             p = tmp
             n = m
diff --git a/numpy/polynomial/hermite.py b/numpy/polynomial/hermite.py
index c096f3a8e..199b47e15 100644
--- a/numpy/polynomial/hermite.py
+++ b/numpy/polynomial/hermite.py
@@ -278,12 +278,12 @@ def hermfromroots(roots) :
     else :
         [roots] = pu.as_series([roots], trim=False)
         roots.sort()
-        n = len(roots)
         p = [hermline(-r, 1) for r in roots]
+        n = len(p)
         while n > 1:
-            m = n//2
+            m, r = divmod(n, 2)
             tmp = [hermmul(p[i], p[i+m]) for i in range(m)]
-            if n%2:
+            if r:
                 tmp[0] = hermmul(tmp[0], p[-1])
             p = tmp
             n = m
diff --git a/numpy/polynomial/hermite_e.py b/numpy/polynomial/hermite_e.py
index 8cf9dd09d..d0efe7209 100644
--- a/numpy/polynomial/hermite_e.py
+++ b/numpy/polynomial/hermite_e.py
@@ -278,12 +278,12 @@ def hermefromroots(roots) :
     else :
         [roots] = pu.as_series([roots], trim=False)
         roots.sort()
-        n = len(roots)
         p = [hermeline(-r, 1) for r in roots]
+        n = len(p)
         while n > 1:
-            m = n//2
+            m, r = divmod(n, 2)
             tmp = [hermemul(p[i], p[i+m]) for i in range(m)]
-            if n%2:
+            if r:
                 tmp[0] = hermemul(tmp[0], p[-1])
             p = tmp
             n = m
diff --git a/numpy/polynomial/laguerre.py b/numpy/polynomial/laguerre.py
index b5c1df9c2..7b518404f 100644
--- a/numpy/polynomial/laguerre.py
+++ b/numpy/polynomial/laguerre.py
@@ -275,12 +275,12 @@ def lagfromroots(roots) :
     else :
         [roots] = pu.as_series([roots], trim=False)
         roots.sort()
-        n = len(roots)
         p = [lagline(-r, 1) for r in roots]
+        n = len(p)
         while n > 1:
-            m = n//2
+            m, r = divmod(n, 2)
             tmp = [lagmul(p[i], p[i+m]) for i in range(m)]
-            if n%2:
+            if r:
                 tmp[0] = lagmul(tmp[0], p[-1])
             p = tmp
             n = m
diff --git a/numpy/polynomial/legendre.py b/numpy/polynomial/legendre.py
index f36fa4d0e..94098632c 100644
--- a/numpy/polynomial/legendre.py
+++ b/numpy/polynomial/legendre.py
@@ -307,12 +307,12 @@ def legfromroots(roots) :
     else :
         [roots] = pu.as_series([roots], trim=False)
         roots.sort()
-        n = len(roots)
         p = [legline(-r, 1) for r in roots]
+        n = len(p)
         while n > 1:
-            m = n//2
+            m, r = divmod(n, 2)
             tmp = [legmul(p[i], p[i+m]) for i in range(m)]
-            if n%2:
+            if r:
                 tmp[0] = legmul(tmp[0], p[-1])
             p = tmp
             n = m
diff --git a/numpy/polynomial/polynomial.py b/numpy/polynomial/polynomial.py
index dd0e1591b..6f67814ad 100644
--- a/numpy/polynomial/polynomial.py
+++ b/numpy/polynomial/polynomial.py
@@ -170,12 +170,12 @@ def polyfromroots(roots) :
     else :
         [roots] = pu.as_series([roots], trim=False)
         roots.sort()
-        n = len(roots)
         p = [polyline(-r, 1) for r in roots]
+        n = len(p)
         while n > 1:
-            m = n//2
+            m, r = divmod(n, 2)
             tmp = [polymul(p[i], p[i+m]) for i in range(m)]
-            if n%2:
+            if r:
                 tmp[0] = polymul(tmp[0], p[-1])
             p = tmp
             n = m