Merge branch '1.5.x' of https://github.com/pandas-dev/pandas into 1.5.x

.github/workflows/32-bit-linux.yml

@@ -5,12 +5,10 @@ on:
     branches:
       - main
       - 1.5.x
-      - 1.4.x
   pull_request:
     branches:
       - main
       - 1.5.x
-      - 1.4.x
     paths-ignore:
       - "doc/**"
 

.github/workflows/code-checks.yml

@@ -5,12 +5,10 @@ on:
     branches:
       - main
       - 1.5.x
-      - 1.4.x
   pull_request:
     branches:
       - main
       - 1.5.x
-      - 1.4.x
 
 env:
   ENV_FILE: environment.yml

.github/workflows/docbuild-and-upload.yml

@@ -5,14 +5,12 @@ on:
     branches:
       - main
       - 1.5.x
-      - 1.4.x
     tags:
       - '*'
   pull_request:
     branches:
       - main
       - 1.5.x
-      - 1.4.x
 
 env:
   ENV_FILE: environment.yml
@@ -66,22 +64,22 @@ jobs:
         mkdir -m 700 -p ~/.ssh
         echo "${{ secrets.server_ssh_key }}" > ~/.ssh/id_rsa
         chmod 600 ~/.ssh/id_rsa
-        echo "${{ secrets.server_ip }} ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBE1Kkopomm7FHG5enATf7SgnpICZ4W2bw+Ho+afqin+w7sMcrsa0je7sbztFAV8YchDkiBKnWTG4cRT+KZgZCaY=" > ~/.ssh/known_hosts
+        echo "${{ secrets.server_ip }} ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBFjYkJBk7sos+r7yATODogQc3jUdW1aascGpyOD4bohj8dWjzwLJv/OJ/fyOQ5lmj81WKDk67tGtqNJYGL9acII=" > ~/.ssh/known_hosts
       if: github.event_name == 'push' && (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/'))
 
     - name: Copy cheatsheets into site directory
       run: cp doc/cheatsheet/Pandas_Cheat_Sheet* web/build/
 
     - name: Upload web
-      run: rsync -az --delete --exclude='pandas-docs' --exclude='docs' web/build/ docs@${{ secrets.server_ip }}:/usr/share/nginx/pandas
+      run: rsync -az --delete --exclude='pandas-docs' --exclude='docs' web/build/ web@${{ secrets.server_ip }}:/var/www/html
       if: github.event_name == 'push' && github.ref == 'refs/heads/main'
 
     - name: Upload dev docs
-      run: rsync -az --delete doc/build/html/ docs@${{ secrets.server_ip }}:/usr/share/nginx/pandas/pandas-docs/dev
+      run: rsync -az --delete doc/build/html/ web@${{ secrets.server_ip }}:/var/www/html/pandas-docs/dev
       if: github.event_name == 'push' && github.ref == 'refs/heads/main'
 
     - name: Upload prod docs
-      run: rsync -az --delete doc/build/html/ docs@${{ secrets.server_ip }}:/usr/share/nginx/pandas/pandas-docs/version/${GITHUB_REF_NAME:1}
+      run: rsync -az --delete doc/build/html/ web@${{ secrets.server_ip }}:/var/www/html/pandas-docs/version/${GITHUB_REF_NAME:1}
       if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
 
     - name: Move docs into site directory

.github/workflows/macos-windows.yml

@@ -5,12 +5,10 @@ on:
     branches:
       - main
       - 1.5.x
-      - 1.4.x
   pull_request:
     branches:
       - main
       - 1.5.x
-      - 1.4.x
     paths-ignore:
       - "doc/**"
 

.github/workflows/python-dev.yml

@@ -25,12 +25,10 @@ on:
     branches:
       - main
       - 1.5.x
-      - 1.4.x
   pull_request:
     branches:
       - main
       - 1.5.x
-      - 1.4.x
     paths-ignore:
       - "doc/**"
 

.github/workflows/sdist.yml

@@ -5,12 +5,10 @@ on:
     branches:
       - main
       - 1.5.x
-      - 1.4.x
   pull_request:
     branches:
       - main
       - 1.5.x
-      - 1.4.x
     types: [labeled, opened, synchronize, reopened]
     paths-ignore:
       - "doc/**"
@@ -30,7 +28,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10"]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
     concurrency:
       # https://github.community/t/concurrecy-not-work-for-push/183068/7
       group: ${{ github.event_name == 'push' && github.run_number || github.ref }}-${{matrix.python-version}}-sdist
@@ -42,7 +40,7 @@ jobs:
         fetch-depth: 0
 
     - name: Set up Python
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -86,6 +84,8 @@ jobs:
           pip install numpy==1.20.3 ;;
         3.10)
           pip install numpy==1.21.2 ;;
+        3.11)
+          pip install numpy==1.23.2 ;;
         esac
 
     - name: Import pandas

.github/workflows/ubuntu.yml

@@ -5,12 +5,10 @@ on:
     branches:
       - main
       - 1.5.x
-      - 1.4.x
   pull_request:
     branches:
       - main
       - 1.5.x
-      - 1.4.x
     paths-ignore:
       - "doc/**"
 

doc/source/development/contributing_environment.rst

@@ -10,7 +10,7 @@ To test out code changes, you'll need to build pandas from source, which
 requires a C/C++ compiler and Python environment. If you're making documentation
 changes, you can skip to :ref:`contributing to the documentation <contributing_documentation>` but if you skip
 creating the development environment you won't be able to build the documentation
-locally before pushing your changes.
+locally before pushing your changes. It's recommended to also install the :ref:`pre-commit hooks <contributing.pre-commit>`.
 
 .. contents:: Table of contents:
    :local:

doc/source/getting_started/install.rst

@@ -20,7 +20,7 @@ Instructions for installing from source,
 Python version support
 ----------------------
 
-Officially Python 3.8, 3.9 and 3.10.
+Officially Python 3.8, 3.9, 3.10 and 3.11.
 
 Installing pandas
 -----------------

doc/source/whatsnew/v0.13.0.rst

@@ -733,7 +733,7 @@ Enhancements
 
 .. _scipy: http://www.scipy.org
 .. _documentation: http://docs.scipy.org/doc/scipy/reference/interpolate.html#univariate-interpolation
-.. _guide: http://docs.scipy.org/doc/scipy/reference/tutorial/interpolate.html
+.. _guide: https://docs.scipy.org/doc/scipy/tutorial/interpolate.html
 
 - ``to_csv`` now takes a ``date_format`` keyword argument that specifies how
   output datetime objects should be formatted. Datetimes encountered in the

doc/source/whatsnew/v1.5.2.rst

@@ -13,15 +13,19 @@ including other versions of pandas.
 
 Fixed regressions
 ~~~~~~~~~~~~~~~~~
--
+- Fixed regression in :meth:`MultiIndex.join` for extension array dtypes (:issue:`49277`)
+- Fixed regression in :meth:`Series.replace` raising ``RecursionError`` with numeric dtype and when specifying ``value=None`` (:issue:`45725`)
+- Fixed regression in :meth:`DataFrame.plot` preventing :class:`~matplotlib.colors.Colormap` instance
+  from being passed using the ``colormap`` argument if Matplotlib 3.6+ is used (:issue:`49374`)
+- Fixed regression in :func:`date_range` returning an invalid set of periods for ``CustomBusinessDay`` frequency and ``start`` date with timezone (:issue:`49441`)
 -
 
 .. ---------------------------------------------------------------------------
 .. _whatsnew_152.bug_fixes:
 
 Bug fixes
 ~~~~~~~~~
--
+- Bug in the Copy-on-Write implementation losing track of views in certain chained indexing cases (:issue:`48996`)
 -
 
 .. ---------------------------------------------------------------------------

pandas/_libs/internals.pyx

@@ -676,8 +676,9 @@ cdef class BlockManager:
         public bint _known_consolidated, _is_consolidated
         public ndarray _blknos, _blklocs
         public list refs
+        public object parent
 
-    def __cinit__(self, blocks=None, axes=None, refs=None, verify_integrity=True):
+    def __cinit__(self, blocks=None, axes=None, refs=None, parent=None, verify_integrity=True):
         # None as defaults for unpickling GH#42345
         if blocks is None:
             # This adds 1-2 microseconds to DataFrame(np.array([]))
@@ -690,6 +691,7 @@ cdef class BlockManager:
         self.blocks = blocks
         self.axes = axes.copy()  # copy to make sure we are not remotely-mutable
         self.refs = refs
+        self.parent = parent
 
         # Populate known_consolidate, blknos, and blklocs lazily
         self._known_consolidated = False
@@ -805,7 +807,9 @@ cdef class BlockManager:
             nrefs.append(weakref.ref(blk))
 
         new_axes = [self.axes[0], self.axes[1]._getitem_slice(slobj)]
-        mgr = type(self)(tuple(nbs), new_axes, nrefs, verify_integrity=False)
+        mgr = type(self)(
+            tuple(nbs), new_axes, nrefs, parent=self, verify_integrity=False
+        )
 
         # We can avoid having to rebuild blklocs/blknos
         blklocs = self._blklocs
@@ -827,4 +831,6 @@ cdef class BlockManager:
         new_axes = list(self.axes)
         new_axes[axis] = new_axes[axis]._getitem_slice(slobj)
 
-        return type(self)(tuple(new_blocks), new_axes, new_refs, verify_integrity=False)
+        return type(self)(
+            tuple(new_blocks), new_axes, new_refs, parent=self, verify_integrity=False
+        )

pandas/_libs/tslibs/offsets.pyx

@@ -258,7 +258,9 @@ cdef _to_dt64D(dt):
     if getattr(dt, 'tzinfo', None) is not None:
         # Get the nanosecond timestamp,
         #  equiv `Timestamp(dt).value` or `dt.timestamp() * 10**9`
-        naive = dt.astimezone(None)
+        # The `naive` must be the `dt` naive wall time
+        #  instead of the naive absolute time (GH#49441)
+        naive = dt.replace(tzinfo=None)
         dt = np.datetime64(naive, "D")
     else:
         dt = np.datetime64(dt)

pandas/core/frame.py

@@ -86,6 +86,7 @@
     function as nv,
     np_percentile_argname,
 )
+from pandas.errors import InvalidIndexError
 from pandas.util._decorators import (
     Appender,
     Substitution,
@@ -4220,6 +4221,13 @@ def _set_value(
                 self.loc[index, col] = value
             self._item_cache.pop(col, None)
 
+        except InvalidIndexError as ii_err:
+            # GH48729: Seems like you are trying to assign a value to a
+            # row when only scalar options are permitted
+            raise InvalidIndexError(
+                f"You can only assign a scalar value not a {type(value)}"
+            ) from ii_err
+
     def _ensure_valid_index(self, value) -> None:
         """
         Ensure that if we don't have an index, that we can create one from the

pandas/core/indexes/base.py

@@ -4701,8 +4701,10 @@ def join(
             return self._join_non_unique(other, how=how)
         elif not self.is_unique or not other.is_unique:
             if self.is_monotonic_increasing and other.is_monotonic_increasing:
-                if self._can_use_libjoin:
+                if not is_interval_dtype(self.dtype):
                     # otherwise we will fall through to _join_via_get_indexer
+                    # GH#39133
+                    # go through object dtype for ea till engine is supported properly
                     return self._join_monotonic(other, how=how)
             else:
                 return self._join_non_unique(other, how=how)
@@ -5079,7 +5081,7 @@ def _wrap_joined_index(self: _IndexT, joined: ArrayLike, other: _IndexT) -> _Ind
             return self._constructor(joined, name=name)  # type: ignore[return-value]
         else:
             name = get_op_result_name(self, other)
-            return self._constructor._with_infer(joined, name=name)
+            return self._constructor._with_infer(joined, name=name, dtype=self.dtype)
 
     @cache_readonly
     def _can_use_libjoin(self) -> bool:

pandas/core/internals/blocks.py

@@ -569,7 +569,6 @@ def replace(
         # Note: the checks we do in NDFrame.replace ensure we never get
         #  here with listlike to_replace or value, as those cases
         #  go through replace_list
-
         values = self.values
 
         if isinstance(values, Categorical):
@@ -608,7 +607,10 @@ def replace(
             return blocks
 
         elif self.ndim == 1 or self.shape[0] == 1:
-            blk = self.coerce_to_target_dtype(value)
+            if value is None:
+                blk = self.astype(np.dtype(object))
+            else:
+                blk = self.coerce_to_target_dtype(value)
             return blk.replace(
                 to_replace=to_replace,
                 value=value,