From 1f0dc880cb6c856f888630990b5443c4b876d372 Mon Sep 17 00:00:00 2001
From: spencerkclark <spencerkclark@gmail.com>
Date: Sat, 4 Feb 2023 15:43:54 -0500
Subject: [PATCH] [test-upstream] Move _NoDefault to pdcompat; fix doc build

---
 xarray/coding/cftime_offsets.py | 38 +++++++--------------------------
 xarray/core/pdcompat.py         | 26 ++++++++++++++++++++++
 2 files changed, 34 insertions(+), 30 deletions(-)

diff --git a/xarray/coding/cftime_offsets.py b/xarray/coding/cftime_offsets.py
index f5304d10053..b0442ddbd7c 100644
--- a/xarray/coding/cftime_offsets.py
+++ b/xarray/coding/cftime_offsets.py
@@ -43,9 +43,8 @@
 
 import re
 from datetime import datetime, timedelta
-from enum import Enum
 from functools import partial
-from typing import TYPE_CHECKING, ClassVar, Literal
+from typing import TYPE_CHECKING, ClassVar
 
 import numpy as np
 import pandas as pd
@@ -58,7 +57,7 @@
     format_cftime_datetime,
 )
 from xarray.core.common import _contains_datetime_like_objects, is_np_datetime_like
-from xarray.core.pdcompat import count_not_none
+from xarray.core.pdcompat import NoDefault, count_not_none, no_default
 from xarray.core.utils import emit_user_level_warning
 
 try:
@@ -855,29 +854,6 @@ def _generate_range(start, end, periods, offset):
             current = next_date
 
 
-class _NoDefault(Enum):
-    """Used by pandas to specify a default value for a deprecated argument.
-    Copied from pandas._libs.lib._NoDefault.
-
-    See also:
-    - pandas-dev/pandas#30788
-    - pandas-dev/pandas#40684
-    - pandas-dev/pandas#40715
-    - pandas-dev/pandas#47045
-    """
-
-    no_default = "NO_DEFAULT"
-
-    def __repr__(self) -> str:
-        return "<no_default>"
-
-
-no_default = (
-    _NoDefault.no_default
-)  # Sentinel indicating the default value following pandas
-NoDefault = Literal[_NoDefault.no_default]  # For typing following pandas
-
-
 def _translate_closed_to_inclusive(closed):
     """Follows code added in pandas #43504."""
     emit_user_level_warning(
@@ -939,12 +915,11 @@ def cftime_range(
         Normalize start/end dates to midnight before generating date range.
     name : str, default: None
         Name of the resulting index
-    closed : {"left", "right"} or None, default: "NO_DEFAULT"
+    closed : {None, "left", "right"}, default: "NO_DEFAULT"
         Make the interval closed with respect to the given frequency to the
         "left", "right", or both sides (None).
 
         .. deprecated:: 2023.01.1
-
             Following pandas, the ``closed`` parameter is deprecated in favor
             of the ``inclusive`` parameter, and will be removed in a future
             version of xarray.
@@ -968,6 +943,7 @@ def cftime_range(
     features of ``pandas.date_range`` (e.g. specifying how the index is
     ``closed`` on either side, or whether or not to ``normalize`` the start and
     end bounds); however, there are some notable exceptions:
+
     - You cannot specify a ``tz`` (time zone) argument.
     - Start or end dates specified as partial-datetime strings must use the
       `ISO-8601 format <https://en.wikipedia.org/wiki/ISO_8601>`_.
@@ -1186,7 +1162,7 @@ def date_range(
         Normalize start/end dates to midnight before generating date range.
     name : str, default: None
         Name of the resulting index
-    closed : {"left", "right"} or None, default: "NO_DEFAULT"
+    closed : {None, "left", "right"}, default: "NO_DEFAULT"
         Make the interval closed with respect to the given frequency to the
         "left", "right", or both sides (None).
 
@@ -1194,10 +1170,12 @@ def date_range(
             Following pandas, the `closed` parameter is deprecated in favor
             of the `inclusive` parameter, and will be removed in a future
             version of xarray.
-    inclusive : {None, "both", "neither", "left", "right"}, default None
+
+    inclusive : {None, "both", "neither", "left", "right"}, default: None
         Include boundaries; whether to set each bound as closed or open.
 
         .. versionadded:: 2023.01.1
+
     calendar : str, default: "standard"
         Calendar type for the datetimes.
     use_cftime : boolean, optional
diff --git a/xarray/core/pdcompat.py b/xarray/core/pdcompat.py
index 7a4b3c405ae..018bb19b871 100644
--- a/xarray/core/pdcompat.py
+++ b/xarray/core/pdcompat.py
@@ -35,6 +35,9 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 from __future__ import annotations
 
+from enum import Enum
+from typing import Literal
+
 
 def count_not_none(*args) -> int:
     """Compute the number of non-None arguments.
@@ -42,3 +45,26 @@ def count_not_none(*args) -> int:
     Copied from pandas.core.common.count_not_none (not part of the public API)
     """
     return sum(arg is not None for arg in args)
+
+
+class _NoDefault(Enum):
+    """Used by pandas to specify a default value for a deprecated argument.
+    Copied from pandas._libs.lib._NoDefault.
+
+    See also:
+    - pandas-dev/pandas#30788
+    - pandas-dev/pandas#40684
+    - pandas-dev/pandas#40715
+    - pandas-dev/pandas#47045
+    """
+
+    no_default = "NO_DEFAULT"
+
+    def __repr__(self) -> str:
+        return "<no_default>"
+
+
+no_default = (
+    _NoDefault.no_default
+)  # Sentinel indicating the default value following pandas
+NoDefault = Literal[_NoDefault.no_default]  # For typing following pandas