Revert gh-8570.

BUG: fix issue #8250 where np.random.permutation fail.

This reverts commit 7a73bad2d9c04e4f16e87dbed9d7b627327fe814.

Closes #8776.

2 files changed, 1 insertions, 42 deletions

diff --git a/numpy/random/mtrand/mtrand.pyx b/numpy/random/mtrand/mtrand.pyx
index ee0e31172..bf3a385a9 100644
--- a/numpy/random/mtrand/mtrand.pyx
+++ b/numpy/random/mtrand/mtrand.pyx
@@ -143,7 +143,6 @@ cdef extern from "initarray.h":
 import_array()
 
 cimport cython
-import copy
 import numpy as np
 import operator
 import warnings
@@ -4872,7 +4871,7 @@ cdef class RandomState:
         if isinstance(x, (int, long, np.integer)):
             arr = np.arange(x)
         else:
-            arr = copy.copy(x)
+            arr = np.array(x)
         self.shuffle(arr)
         return arr
 
diff --git a/numpy/random/tests/test_random.py b/numpy/random/tests/test_random.py
index 8b05cc724..e4c58e2bd 100644
--- a/numpy/random/tests/test_random.py
+++ b/numpy/random/tests/test_random.py
@@ -419,46 +419,6 @@ class TestRandomDist(TestCase):
             desired = conv([0, 1, 9, 6, 2, 4, 5, 8, 7, 3])
             assert_array_equal(actual, desired)
 
-    def test_permutation(self):
-        # Test that permutation works on a list of tuples, and integers.
-
-        # list of (1, np.array([1, 1]), (2, np.array([2, 2])), and so on.
-        N = 5
-        A = np.arange(N)[:,None]
-        A = np.concatenate((A, A), axis=1)
-        B = range(N)
-        c = list(zip(B, A))
-        assert_(sorted(c) == sorted(np.random.permutation(c)))
-
-        d = np.arange(N)
-        assert_array_equal(d, sorted(np.random.permutation(N)))
-
-        # only integer arguments are accepted.
-        assert_raises(TypeError, np.random.permutation, 3.0)
-
-        # same test as shuffle.
-        for conv in [lambda x: np.array([]),
-                     lambda x: x,
-                     lambda x: np.asarray(x).astype(np.int8),
-                     lambda x: np.asarray(x).astype(np.float32),
-                     lambda x: np.asarray(x).astype(np.complex64),
-                     lambda x: np.asarray(x).astype(object),
-                     lambda x: [(i, i) for i in x],
-                     lambda x: np.asarray([[i, i] for i in x]),
-                     lambda x: np.vstack([x, x]).T,
-                     # gh-4270
-                     lambda x: np.asarray([(i, i) for i in x],
-                                          [("a", object, 1),
-                                           ("b", np.int32, 1)])]:
-            np.random.seed(self.seed)
-            alist = conv([1, 2, 3, 4, 5, 6, 7, 8, 9, 0])
-            blist = np.random.permutation(alist)
-            # check that array is not mutated.
-            assert_array_equal(alist, conv([1, 2, 3, 4, 5, 6, 7, 8, 9, 0]))
-            actual = blist
-            desired = conv([0, 1, 9, 6, 2, 4, 5, 8, 7, 3])
-            assert_array_equal(actual, desired)
-
     def test_shuffle_masked(self):
         # gh-3263
         a = np.ma.masked_values(np.reshape(range(20), (5, 4)) % 3 - 1, -1)