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-rw-r--r--numpy/lib/arraysetops.py5
1 files changed, 5 insertions, 0 deletions
diff --git a/numpy/lib/arraysetops.py b/numpy/lib/arraysetops.py
index 850e20123..fd64ecbd6 100644
--- a/numpy/lib/arraysetops.py
+++ b/numpy/lib/arraysetops.py
@@ -479,6 +479,11 @@ def setxor1d(ar1, ar2, assume_unique=False):
return aux[flag[1:] & flag[:-1]]
+def _in1d_dispatcher(ar1, ar2, assume_unique=None, invert=None):
+ return (ar1, ar2)
+
+
+@array_function_dispatch(_in1d_dispatcher)
def in1d(ar1, ar2, assume_unique=False, invert=False):
"""
Test whether each element of a 1-D array is also present in a second array.