Merge branch 'master' of https://github.com/pandas-dev/pandas into sty-private

Author: jbrockmendel

doc/source/whatsnew/index.rst

@@ -24,6 +24,7 @@ Version 1.1
 .. toctree::
    :maxdepth: 2
 
+   v1.1.3
    v1.1.2
    v1.1.1
    v1.1.0

doc/source/whatsnew/v1.1.2.rst

@@ -1,7 +1,7 @@
 .. _whatsnew_112:
 
-What's new in 1.1.2 (??)
-------------------------
+What's new in 1.1.2 (September 8, 2020)
+---------------------------------------
 
 These are the changes in pandas 1.1.2. See :ref:`release` for a full changelog
 including other versions of pandas.
@@ -23,7 +23,8 @@ Fixed regressions
 - Regression in :meth:`DataFrame.replace` where a ``TypeError`` would be raised when attempting to replace elements of type :class:`Interval` (:issue:`35931`)
 - Fix regression in pickle roundtrip of the ``closed`` attribute of :class:`IntervalIndex` (:issue:`35658`)
 - Fixed regression in :meth:`DataFrameGroupBy.agg` where a ``ValueError: buffer source array is read-only`` would be raised when the underlying array is read-only (:issue:`36014`)
--
+- Fixed regression in :meth:`Series.groupby.rolling` number of levels of :class:`MultiIndex` in input was compressed to one (:issue:`36018`)
+- Fixed regression in :class:`DataFrameGroupBy` on an empty :class:`DataFrame` (:issue:`36197`)
 
 .. ---------------------------------------------------------------------------
 
@@ -41,6 +42,8 @@ Bug fixes
 - Bug in :meth:`Series.dt.isocalendar` and :meth:`DatetimeIndex.isocalendar` that returned incorrect year for certain dates (:issue:`36032`)
 - Bug in :class:`DataFrame` indexing returning an incorrect :class:`Series` in some cases when the series has been altered and a cache not invalidated (:issue:`33675`)
 - Bug in :meth:`DataFrame.corr` causing subsequent indexing lookups to be incorrect (:issue:`35882`)
+- Bug in :meth:`import_optional_dependency` returning incorrect package names in cases where package name is different from import name (:issue:`35948`)
+- Bug when setting empty :class:`DataFrame` column to a :class:`Series` in preserving name of index in frame (:issue:`31368`)
 
 .. ---------------------------------------------------------------------------
 
@@ -49,6 +52,7 @@ Bug fixes
 Other
 ~~~~~
 - :meth:`factorize` now supports ``na_sentinel=None`` to include NaN in the uniques of the values and remove ``dropna`` keyword which was unintentionally exposed to public facing API in 1.1 version from :meth:`factorize` (:issue:`35667`)
+- :meth:`DataFrame.plot` and :meth:`Series.plot` raise ``UserWarning`` about usage of ``FixedFormatter`` and ``FixedLocator`` (:issue:`35684` and :issue:`35945`)
 
 .. ---------------------------------------------------------------------------
 
@@ -57,4 +61,4 @@ Other
 Contributors
 ~~~~~~~~~~~~
 
-.. contributors:: v1.1.1..v1.1.2|HEAD
+.. contributors:: v1.1.1..v1.1.2

doc/source/whatsnew/v1.1.3.rst

@@ -0,0 +1,42 @@
+.. _whatsnew_113:
+
+What's new in 1.1.3 (??)
+------------------------
+
+These are the changes in pandas 1.1.3. See :ref:`release` for a full changelog
+including other versions of pandas.
+
+{{ header }}
+
+.. ---------------------------------------------------------------------------
+
+.. _whatsnew_113.regressions:
+
+Fixed regressions
+~~~~~~~~~~~~~~~~~
+-
+
+.. ---------------------------------------------------------------------------
+
+.. _whatsnew_113.bug_fixes:
+
+Bug fixes
+~~~~~~~~~
+-
+
+.. ---------------------------------------------------------------------------
+
+.. _whatsnew_113.other:
+
+Other
+~~~~~
+-
+
+.. ---------------------------------------------------------------------------
+
+.. _whatsnew_113.contributors:
+
+Contributors
+~~~~~~~~~~~~
+
+.. contributors:: v1.1.2..v1.1.3|HEAD

doc/source/whatsnew/v1.2.0.rst

@@ -228,6 +228,7 @@ Datetimelike
 - Bug in :class:`DateOffset` where attributes reconstructed from pickle files differ from original objects when input values exceed normal ranges (e.g months=12) (:issue:`34511`)
 - Bug in :meth:`DatetimeIndex.get_slice_bound` where ``datetime.date`` objects were not accepted or naive :class:`Timestamp` with a tz-aware :class:`DatetimeIndex` (:issue:`35690`)
 - Bug in :meth:`DatetimeIndex.slice_locs` where ``datetime.date`` objects were not accepted (:issue:`34077`)
+- Bug in :meth:`DatetimeIndex.searchsorted`, :meth:`TimedeltaIndex.searchsorted`, and :meth:`Series.searchsorted` with ``datetime64`` or ``timedelta64`` dtype placement of ``NaT`` values being inconsistent with ``NumPy`` (:issue:`36176`)
 
 Timedelta
 ^^^^^^^^^
@@ -244,7 +245,7 @@ Timezones
 
 Numeric
 ^^^^^^^
--
+- Bug in :func:`to_numeric` where float precision was incorrect (:issue:`31364`)
 -
 
 Conversion
@@ -300,7 +301,6 @@ Plotting
 ^^^^^^^^
 
 - Bug in :meth:`DataFrame.plot` where a marker letter in the ``style`` keyword sometimes causes a ``ValueError`` (:issue:`21003`)
-- meth:`DataFrame.plot` and meth:`Series.plot` raise ``UserWarning`` about usage of FixedFormatter and FixedLocator (:issue:`35684` and :issue:`35945`)
 
 Groupby/resample/rolling
 ^^^^^^^^^^^^^^^^^^^^^^^^

pandas/_libs/src/parse_helper.h

@@ -18,7 +18,9 @@ int to_double(char *item, double *p_value, char sci, char decimal,
     char *p_end = NULL;
     int error = 0;
 
-    *p_value = xstrtod(item, &p_end, decimal, sci, '\0', 1, &error, maybe_int);
+    /* Switch to precise xstrtod GH 31364 */
+    *p_value = precise_xstrtod(item, &p_end, decimal, sci, '\0', 1,
+                               &error, maybe_int);
 
     return (error == 0) && (!*p_end);
 }

pandas/compat/_optional.py

@@ -33,6 +33,19 @@
     "numba": "0.46.0",
 }
 
+# A mapping from import name to package name (on PyPI) for packages where
+# these two names are different.
+
+INSTALL_MAPPING = {
+    "bs4": "beautifulsoup4",
+    "bottleneck": "Bottleneck",
+    "lxml.etree": "lxml",
+    "odf": "odfpy",
+    "pandas_gbq": "pandas-gbq",
+    "sqlalchemy": "SQLAlchemy",
+    "jinja2": "Jinja2",
+}
+
 
 def _get_version(module: types.ModuleType) -> str:
     version = getattr(module, "__version__", None)
@@ -82,9 +95,13 @@ def import_optional_dependency(
         is False, or when the package's version is too old and `on_version`
         is ``'warn'``.
     """
+
+    package_name = INSTALL_MAPPING.get(name)
+    install_name = package_name if package_name is not None else name
+
     msg = (
-        f"Missing optional dependency '{name}'. {extra} "
-        f"Use pip or conda to install {name}."
+        f"Missing optional dependency '{install_name}'. {extra} "
+        f"Use pip or conda to install {install_name}."
     )
     try:
         module = importlib.import_module(name)