ENH: disallow passing array-like to array_namespace

Author: tupui

array_api_compat/common/_helpers.py

@@ -71,9 +71,7 @@ def your_function(x, y):
     """
     namespaces = set()
     for x in xs:
-        if isinstance(x, (tuple, list)):
-            namespaces.add(array_namespace(*x, _use_compat=_use_compat))
-        elif hasattr(x, '__array_namespace__'):
+        if hasattr(x, '__array_namespace__'):
             namespaces.add(x.__array_namespace__(api_version=api_version))
         elif _is_numpy_array(x):
             _check_api_version(api_version)

tests/test_array_namespace.py

@@ -19,15 +19,10 @@ def test_array_namespace(library, api_version):
     else:
         assert namespace == getattr(array_api_compat, library)
 
-def test_array_namespace_multiple():
-    import numpy as np
-
-    x = np.asarray([1, 2])
-    assert array_namespace(x, x) == array_namespace((x, x)) == \
-        array_namespace((x, x), x) == array_api_compat.numpy
 
 def test_array_namespace_errors():
     pytest.raises(TypeError, lambda: array_namespace([1]))
+    pytest.raises(TypeError, lambda: array_namespace([1, 2]))
     pytest.raises(TypeError, lambda: array_namespace())
 
     import numpy as np