Convert tuple to list before _list_to_arrays when construct DataFrame.

Signed-off-by: HE, Tao <[email protected]>

Author: sighingnow

doc/source/whatsnew/v0.25.0.rst

@@ -124,7 +124,7 @@ Bug Fixes
 ~~~~~~~~~
 - Bug in :func:`to_datetime` which would raise an (incorrect) ``ValueError`` when called with a date far into the future and the ``format`` argument specified instead of raising ``OutOfBoundsDatetime`` (:issue:`23830`)
 - Bug in an error message in :meth:`DataFrame.plot`. Improved the error message if non-numerics are passed to :meth:`DataFrame.plot` (:issue:`25481`)
--
+- Segmentation fault when construct :class:`DataFrame` from non-empty tuples (:issue:`25691`)
 
 Categorical
 ^^^^^^^^^^^

pandas/core/internals/construction.py

@@ -394,7 +394,7 @@ def to_arrays(data, columns, coerce_float=False, dtype=None):
                 return [[]] * len(columns), columns
         return [], []  # columns if columns is not None else []
     if isinstance(data[0], (list, tuple)):
-        return _list_to_arrays(data, columns, coerce_float=coerce_float,
+        return _list_to_arrays(list(data), columns, coerce_float=coerce_float,
                                dtype=dtype)
     elif isinstance(data[0], compat.Mapping):
         return _list_of_dict_to_arrays(data, columns,

pandas/tests/frame/test_constructors.py

@@ -1202,12 +1202,26 @@ def test_constructor_mixed_type_rows(self):
         expected = DataFrame([[1, 2], [3, 4]])
         tm.assert_frame_equal(result, expected)
 
-    def test_constructor_tuples(self):
+    @pytest.mark.parametrize("tuples,lists", [
+        ((), []),
+        ((()), []),
+        (((), ()), [(), ()]),
+        (((), ()), [[], []]),
+        (([], []), [[], []]),
+        (([1, 2, 3], [4, 5, 6]), [[1, 2, 3], [4, 5, 6]])
+    ])
+    def test_constructor_tuple(self, tuples, lists):
+        # GH 25691
+        result = DataFrame(tuples)
+        expected = DataFrame(lists)
+        tm.assert_frame_equal(result, expected)
+
+    def test_constructor_list_of_tuples(self):
         result = DataFrame({'A': [(1, 2), (3, 4)]})
         expected = DataFrame({'A': Series([(1, 2), (3, 4)])})
         tm.assert_frame_equal(result, expected)
 
-    def test_constructor_namedtuples(self):
+    def test_constructor_list_of_namedtuples(self):
         # GH11181
         from collections import namedtuple
         named_tuple = namedtuple("Pandas", list('ab'))