CLN: Drop support for Python 2. (#273)

The 0.10.0 package will be the latest version to support Python 2. This
aligns pandas-gbq with pandas, which dropped support for Python 2 at the
end of 2019.

Author: tswast

.circleci/config.yml

@@ -1,14 +1,6 @@
 version: 2
 jobs:
   # Pip
-  "pip-2.7":
-    docker:
-      - image: thekevjames/nox
-    steps:
-      - checkout
-      - run: ci/config_auth.sh
-      - run: nox -s unit-2.7 system-2.7
-
   "pip-3.5":
     docker:
       - image: thekevjames/nox
@@ -60,7 +52,6 @@ workflows:
   version: 2
   build:
     jobs:
-      - "pip-2.7"
       - "pip-3.5"
       - "pip-3.6"
       - "pip-3.7"

MANIFEST.in

@@ -1,6 +1,7 @@
 include MANIFEST.in
 include README.rst
-include LICENSE.md
+include AUTHORS.md
+include LICENSE.txt
 include setup.py
 
 graft pandas_gbq

ci/requirements-2.7.pip

@@ -1,6 +1,15 @@
 Changelog
 =========
 
+.. _changelog-0.11.0:
+
+0.11.0 / TBD
+------------
+
+- **Breaking Change:** Python 2 support has been dropped. This is to align
+  with the pandas package which dropped Python 2 support at the end of 2019.
+  (:issue:`268`)
+
 .. _changelog-0.10.0:
 
 0.10.0 / 2019-04-05

docs/source/changelog.rst

@@ -10,8 +10,8 @@
 import nox
 
 
-supported_pythons = ["2.7", "3.5", "3.6", "3.7"]
-latest_python = "3.6"
+supported_pythons = ["3.5", "3.6", "3.7"]
+latest_python = "3.7"
 
 
 @nox.session
@@ -31,7 +31,7 @@ def blacken(session):
 
 @nox.session(python=supported_pythons)
 def unit(session):
-    session.install("mock", "pytest", "pytest-cov")
+    session.install("pytest", "pytest-cov")
     session.install("-e", ".")
     session.run(
         "pytest",

noxfile.py

@@ -5,8 +5,6 @@
 import os
 import os.path
 
-import pandas.compat
-
 import pandas_gbq.exceptions
 
 logger = logging.getLogger(__name__)
@@ -72,9 +70,7 @@ def get_service_account_credentials(private_key):
                 "   ", "\n"
             )
 
-        if pandas.compat.PY3:
-            json_key["private_key"] = bytes(json_key["private_key"], "UTF-8")
-
+        json_key["private_key"] = bytes(json_key["private_key"], "UTF-8")
         credentials = Credentials.from_service_account_info(json_key)
         credentials = credentials.with_scopes(SCOPES)
 

pandas_gbq/auth.py

@@ -21,7 +21,7 @@
 *   Build the package
 
         git clean -xfd
-        python setup.py register sdist bdist_wheel --universal
+        python setup.py register sdist bdist_wheel
 
 *   Upload to test PyPI
 

release-procedure.md

@@ -43,8 +43,6 @@ def readme():
         "Intended Audience :: Science/Research",
         "Operating System :: OS Independent",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",

setup.py

@@ -1,9 +1,7 @@
 """System tests for fetching Google BigQuery credentials."""
 
-try:
-    import mock
-except ImportError:  # pragma: NO COVER
-    from unittest import mock
+from unittest import mock
+
 import pytest
 
 from pandas_gbq import auth

tests/system/test_auth.py

@@ -9,8 +9,7 @@
 import pandas
 import pandas.api.types
 import pandas.util.testing as tm
-from pandas import DataFrame, NaT, compat
-from pandas.compat import range, u
+from pandas import DataFrame, NaT
 import pytest
 import pytz
 
@@ -447,13 +446,8 @@ def test_should_properly_handle_nullable_booleans(self, project_id):
         )
 
     def test_unicode_string_conversion_and_normalization(self, project_id):
-        correct_test_datatype = DataFrame({"unicode_string": [u("\xe9\xfc")]})
-
-        unicode_string = "\xc3\xa9\xc3\xbc"
-
-        if compat.PY3:
-            unicode_string = unicode_string.encode("latin-1").decode("utf8")
-
+        correct_test_datatype = DataFrame({"unicode_string": ["éü"]})
+        unicode_string = "éü"
         query = 'SELECT "{0}" AS unicode_string'.format(unicode_string)
 
         df = gbq.read_gbq(