CI: Test against Python 3.7

.travis.yml

@@ -35,6 +35,11 @@ matrix:
       language: generic
       env:
         - JOB="3.5, OSX" ENV_FILE="ci/travis-35-osx.yaml" TEST_ARGS="--skip-slow --skip-network"
+
+    - dist: trusty
+      env:
+        - JOB="3.7" ENV_FILE="ci/travis-37.yaml" TEST_ARGS="--skip-slow --skip-network"
+
     - dist: trusty
       env:
         - JOB="2.7, locale, slow, old NumPy" ENV_FILE="ci/travis-27-locale.yaml" LOCALE_OVERRIDE="zh_CN.UTF-8" SLOW=true

ci/travis-37.yaml

@@ -0,0 +1,14 @@
+name: pandas
+channels:
+  - defaults
+  - conda-forge
+  - c3i_test
+dependencies:
+  - python=3.7
+  - cython
+  - numpy
+  - python-dateutil
+  - nomkl
+  - pytz
+  - pytest
+  - pytest-xdist

doc/source/install.rst

@@ -43,7 +43,7 @@ For more information, see the `Python 3 statement`_ and the `Porting to Python 3
 Python version support
 ----------------------
 
-Officially Python 2.7, 3.5, and 3.6.
+Officially Python 2.7, 3.5, 3.6, and 3.7.
 
 Installing pandas
 -----------------

doc/source/whatsnew/v0.23.2.txt

@@ -6,6 +6,12 @@ v0.23.2
 This is a minor bug-fix release in the 0.23.x series and includes some small regression fixes
 and bug fixes. We recommend that all users upgrade to this version.
 
+.. note::
+
+   Pandas 0.23.2 is first pandas release that's compatible with
+   Python 3.7 (:issue:`20552`)
+
+
 .. contents:: What's new in v0.23.2
     :local:
     :backlinks: none

pandas/compat/__init__.py

@@ -40,10 +40,11 @@
 from collections import namedtuple
 
 PY2 = sys.version_info[0] == 2
-PY3 = (sys.version_info[0] >= 3)
-PY35 = (sys.version_info >= (3, 5))
-PY36 = (sys.version_info >= (3, 6))
-PYPY = (platform.python_implementation() == 'PyPy')
+PY3 = sys.version_info[0] >= 3
+PY35 = sys.version_info >= (3, 5)
+PY36 = sys.version_info >= (3, 6)
+PY37 = sys.version_info >= (3, 7)
+PYPY = platform.python_implementation() == 'PyPy'
 
 try:
     import __builtin__ as builtins

pandas/tests/tseries/offsets/test_offsets.py

@@ -591,7 +591,10 @@ def test_repr(self):
         assert repr(self.offset) == '<BusinessDay>'
         assert repr(self.offset2) == '<2 * BusinessDays>'
 
-        expected = '<BusinessDay: offset=datetime.timedelta(1)>'
+        if compat.PY37:
+            expected = '<BusinessDay: offset=datetime.timedelta(days=1)>'
+        else:
+            expected = '<BusinessDay: offset=datetime.timedelta(1)>'
         assert repr(self.offset + timedelta(1)) == expected
 
     def test_with_offset(self):
@@ -1651,7 +1654,10 @@ def test_repr(self):
         assert repr(self.offset) == '<CustomBusinessDay>'
         assert repr(self.offset2) == '<2 * CustomBusinessDays>'
 
-        expected = '<BusinessDay: offset=datetime.timedelta(1)>'
+        if compat.PY37:
+            expected = '<BusinessDay: offset=datetime.timedelta(days=1)>'
+        else:
+            expected = '<BusinessDay: offset=datetime.timedelta(1)>'
         assert repr(self.offset + timedelta(1)) == expected
 
     def test_with_offset(self):

setup.py

@@ -217,6 +217,7 @@ def build_extensions(self):
     'Programming Language :: Python :: 2.7',
     'Programming Language :: Python :: 3.5',
     'Programming Language :: Python :: 3.6',
+    'Programming Language :: Python :: 3.7',
     'Programming Language :: Cython',
     'Topic :: Scientific/Engineering']