Address csv error, undo one fix

pandas-dev · mroeschke · Apr 26, 2023 · Apr 25, 2023 · Apr 25, 2023 · Apr 25, 2023
commit 9e5551e6fbf574d1eef8643deb14755d1281f2a0
diff --git a/pandas/_testing/_warnings.py b/pandas/_testing/_warnings.py
@@ -83,7 +83,7 @@ class for all warnings. To raise multiple types of exceptions,
 
     ..warn:: This is *not* thread-safe.
     """
-    # __tracebackhide__ = True
+    __tracebackhide__ = True
 
     with warnings.catch_warnings(record=True) as w:
         warnings.simplefilter(filter_level)

diff --git a/pandas/core/indexing.py b/pandas/core/indexing.py
@@ -1754,9 +1754,9 @@ def _setitem_with_indexer(self, indexer, value, name: str = "iloc"):
                                 # if not Series (in which case we need to align),
                                 #  we can short-circuit
                                 if (
-                                    isinstance(value, np.ndarray)
-                                    and value.ndim == 1
-                                    and len(value) == 1
+                                    isinstance(arr, np.ndarray)
+                                    and arr.ndim == 1
+                                    and len(arr) == 1
                                 ):
                                     # NumPy 1.25 deprecation: https://github.com/numpy/numpy/pull/10615
                                     arr = arr[0]

diff --git a/pandas/core/internals/blocks.py b/pandas/core/internals/blocks.py
@@ -1063,9 +1063,6 @@ def setitem(self, indexer, value, using_cow: bool = False) -> Block:
                 self = self.make_block_same_class(
                     values.T if values.ndim == 2 else values
                 )
-            if isinstance(value, np.ndarray) and value.ndim == 1 and len(value) == 1:
-                # NumPy 1.25 deprecation: https://github.com/numpy/numpy/pull/10615
-                casted = casted[0]
             values[indexer] = casted
         return self
 

diff --git a/pandas/io/parsers/base_parser.py b/pandas/io/parsers/base_parser.py
@@ -1114,6 +1114,12 @@ def _make_date_converter(
     if date_parser is not lib.no_default and date_format is not None:
         raise TypeError("Cannot use both 'date_parser' and 'date_format'")
 
+    def unpack_if_single_element(arg):
+        # NumPy 1.25 deprecation: https://github.com/numpy/numpy/pull/10615
+        if isinstance(arg, np.ndarray) and arg.ndim == 1 and len(arg) == 1:
+            return arg[0]
+        return arg
+
     def converter(*date_cols, col: Hashable):
         if date_parser is lib.no_default:
             strs = parsing.concat_date_cols(date_cols)
@@ -1137,7 +1143,9 @@ def converter(*date_cols, col: Hashable):
         else:
             try:
                 result = tools.to_datetime(
-                    date_parser(*date_cols), errors="ignore", cache=cache_dates
+                    date_parser(*(unpack_if_single_element(arg) for arg in date_cols)),
+                    errors="ignore",
+                    cache=cache_dates,
                 )
                 if isinstance(result, datetime.datetime):
                     raise Exception("scalar parser")