MAINT: Remove partition and split-like functions from numpy.strings

- Temporary removal of these functions until their behavior has been
discussed further.

Author: lysnikolaou

numpy/_core/defchararray.py

@@ -24,6 +24,14 @@
 from numpy._core import overrides
 from numpy.strings import *
 from numpy.strings import multiply as strings_multiply
+from numpy._core.strings import (
+    _partition as partition,
+    _rpartition as rpartition,
+    _split as split,
+    _rsplit as rsplit,
+    _splitlines as splitlines,
+    _join as join,
+)
 
 __all__ = [
     'equal', 'not_equal', 'greater_equal', 'less_equal',

numpy/_core/strings.py

@@ -54,9 +54,13 @@
     "zfill",
 
     # _vec_string - Will gradually become ufuncs as well
-    "mod", "decode", "encode", "upper", "lower", "swapcase", "capitalize",
-    "title", "join", "split", "rsplit", "splitlines", "partition",
-    "rpartition", "translate",
+    "upper", "lower", "swapcase", "capitalize", "title",
+
+    # _vec_string - Will probably not become ufuncs
+    "mod", "decode", "encode", "translate",
+
+    # Removed from namespace until behavior has been crystalized
+    # "join", "split", "rsplit", "splitlines", "partition", "rpartition",
 ]
 
 
@@ -1145,7 +1149,7 @@ def replace(a, old, new, count=-1):
     return _replace(arr, old, new, counts, out=out)
 
 
-def join(sep, seq):
+def _join(sep, seq):
     """
     Return a string which is the concatenation of the strings in the
     sequence `seq`.
@@ -1179,7 +1183,7 @@ def join(sep, seq):
         _vec_string(sep, np.object_, 'join', (seq,)), seq)
 
 
-def split(a, sep=None, maxsplit=None):
+def _split(a, sep=None, maxsplit=None):
     """
     For each element in `a`, return a list of the words in the
     string, using `sep` as the delimiter string.
@@ -1222,7 +1226,7 @@ def split(a, sep=None, maxsplit=None):
         a, np.object_, 'split', [sep] + _clean_args(maxsplit))
 
 
-def rsplit(a, sep=None, maxsplit=None):
+def _rsplit(a, sep=None, maxsplit=None):
     """
     For each element in `a`, return a list of the words in the
     string, using `sep` as the delimiter string.
@@ -1265,7 +1269,7 @@ def rsplit(a, sep=None, maxsplit=None):
         a, np.object_, 'rsplit', [sep] + _clean_args(maxsplit))
 
 
-def splitlines(a, keepends=None):
+def _splitlines(a, keepends=None):
     """
     For each element in `a`, return a list of the lines in the
     element, breaking at line boundaries.
@@ -1294,7 +1298,7 @@ def splitlines(a, keepends=None):
         a, np.object_, 'splitlines', _clean_args(keepends))
 
 
-def partition(a, sep):
+def _partition(a, sep):
     """
     Partition each element in `a` around `sep`.
 
@@ -1335,7 +1339,7 @@ def partition(a, sep):
         _vec_string(a, np.object_, 'partition', (sep,)), a)
 
 
-def rpartition(a, sep):
+def _rpartition(a, sep):
     """
     Partition (split) each element around the right-most separator.