Merge pull request numpy#30139 from mhvk/array-string-keyword-arguments

MAINT,BUG: make later arguments in array2string keyword only.

Author: charris

doc/release/upcoming_changes/30068.expired.rst

@@ -4,7 +4,8 @@
 The following long-deprecated APIs have been removed or converted to errors:
 
 * The ``style`` parameter has been removed from ``numpy.array2string``.
-  This argument had no effect since Numpy 1.14.0.
+  This argument had no effect since Numpy 1.14.0.  Any arguments following
+  it, such as ``formatter`` have now been made keyword-only.
 
 * Calling ``np.sum(generator)`` directly on a generator object now raises a `TypeError`.
   This behavior was deprecated in NumPy 1.15.0. Use ``np.sum(np.fromiter(generator))``

numpy/_core/arrayprint.py

@@ -619,18 +619,18 @@ def _array2string(a, options, separator=' ', prefix=""):
 def _array2string_dispatcher(
         a, max_line_width=None, precision=None,
         suppress_small=None, separator=None, prefix=None,
-        formatter=None, threshold=None,
+        *, formatter=None, threshold=None,
         edgeitems=None, sign=None, floatmode=None, suffix=None,
-        *, legacy=None):
+        legacy=None):
     return (a,)
 
 
 @array_function_dispatch(_array2string_dispatcher, module='numpy')
 def array2string(a, max_line_width=None, precision=None,
                  suppress_small=None, separator=' ', prefix="",
-                 formatter=None, threshold=None,
+                 *, formatter=None, threshold=None,
                  edgeitems=None, sign=None, floatmode=None, suffix="",
-                 *, legacy=None):
+                 legacy=None):
     """
     Return a string representation of an array.
 

numpy/_core/arrayprint.pyi

@@ -98,13 +98,13 @@ def array2string(
     suppress_small: bool | None = None,
     separator: str = " ",
     prefix: str = "",
+    *,
     formatter: _FormatDict | None = None,
     threshold: int | None = None,
     edgeitems: int | None = None,
     sign: _Sign | None = None,
     floatmode: _FloatMode | None = None,
     suffix: str = "",
-    *,
     legacy: _Legacy | None = None,
 ) -> str: ...