BF: boost min cython to 0.23

closes pandas-dev#14699
closes pandas-dev#14831
closes pandas-dev#14508

Author: yarikoptic

ci/install_travis.sh

@@ -107,7 +107,7 @@ if [ "$BUILD_TEST" ]; then
 
     # build testing
     pip uninstall --yes cython
-    pip install cython==0.19.1
+    pip install cython==0.23
     ( python setup.py build_ext --inplace && python setup.py develop ) || true
 
 else

ci/requirements-2.7.build

@@ -1,4 +1,4 @@
 python-dateutil=2.4.1
 pytz=2013b
 numpy
-cython=0.19.1
+cython=0.23

ci/requirements-2.7_COMPAT.build

@@ -1,4 +1,4 @@
 numpy=1.7.1
-cython=0.19.1
+cython=0.23
 dateutil=1.5
 pytz=2013b

ci/requirements-2.7_LOCALE.build

@@ -1,4 +1,4 @@
 python-dateutil
 pytz=2013b
 numpy=1.7.1
-cython=0.19.1
+cython=0.23

doc/source/install.rst

@@ -243,7 +243,7 @@ Optional Dependencies
 ~~~~~~~~~~~~~~~~~~~~~
 
 * `Cython <http://www.cython.org>`__: Only necessary to build development
-  version. Version 0.19.1 or higher.
+  version. Version 0.23 or higher.
 * `SciPy <http://www.scipy.org>`__: miscellaneous statistical functions
 * `xarray <http://xarray.pydata.org>`__: pandas like handling for > 2 dims, needed for converting Panels to xarray objects. Version 0.7.0 or higher is recommended.
 * `PyTables <http://www.pytables.org>`__: necessary for HDF5-based storage. Version 3.0.0 or higher required, Version 3.2.1 or higher highly recommended.

doc/source/whatsnew/v0.16.1.txt

@@ -9,6 +9,7 @@ users upgrade to this version.
 
 Highlights include:
 
+- Building pandas for development now requires ``cython >= 0.23`` (:issue:`14831`)
 
 Check the :ref:`API Changes <whatsnew_0200.api_breaking>` and :ref:`deprecations <whatsnew_0200.deprecations>` before updating.
 
@@ -54,7 +55,7 @@ Other enhancements
 - New ``UnsortedIndexError`` (subclass of ``KeyError``) raised when indexing/slicing into an
   unsorted MultiIndex (:issue:`11897`). This allows differentiation between errors due to lack
   of sorting or an incorrect key. See :ref:`here <advanced.unsorted>`
- 
+
 - ``pd.cut`` and ``pd.qcut`` now support datetime64 and timedelta64 dtypes (issue:`14714`)
 - ``Series`` provides a ``to_excel`` method to output Excel files (:issue:`8825`)
 - The ``usecols`` argument in ``pd.read_csv`` now accepts a callable function as a value  (:issue:`14154`)
@@ -119,4 +120,19 @@ Performance Improvements
 Bug Fixes
 ~~~~~~~~~
 
-- Bug in ``astype()`` where ``inf`` values were incorrectly converted to integers. Now raises error now with ``astype()`` for Series and DataFrames (:issue:`14265`)
+- Bug in ``astype()`` where ``inf`` values were incorrectly converted to integers. Now raises error now with ``astype()`` for Series and DataFrames (:issue:`14265`)
+
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+- Require at least 0.23 version of cython to avoid problems with character encodings (:issue:`14699`)

doc/source/whatsnew/v0.17.1.txt

@@ -27,7 +27,7 @@ def is_platform_mac():
 import versioneer
 cmdclass = versioneer.get_cmdclass()
 
-min_cython_ver = '0.19.1'
+min_cython_ver = '0.23'
 try:
     import Cython
     ver = Cython.__version__