breaking: drop Python 2 support

Author: laurenyu

README.rst

@@ -93,7 +93,6 @@ Supported Python Versions
 
 SageMaker Python SDK is tested on:
 
-- Python 2.7
 - Python 3.6
 - Python 3.7
 
@@ -121,10 +120,9 @@ You can install the libraries needed to run the tests by running :code:`pip inst
 
 **Unit tests**
 
-
 We run unit tests with tox, which is a program that lets you run unit tests for multiple Python versions, and also make sure the
-code fits our style guidelines. We run tox with Python 2.7, 3.6 and 3.7, so to run unit tests
-with the same configuration we do, you'll need to have interpreters for Python 2.7, Python 3.6 and Python 3.7 installed.
+code fits our style guidelines. We run tox with `all of our supported Python versions <#supported-python-versions>`_, so to run unit tests
+with the same configuration we do, you need to have interpreters for those Python versions installed.
 
 To run the unit tests with tox, run:
 

buildspec-localmodetests.yml

@@ -11,5 +11,5 @@ phases:
 
       # local mode tests
       - start_time=`date +%s`
-      - execute-command-if-has-matching-changes "tox -e py27,py37 -- tests/integ -m local_mode --durations 50" "tests/integ" "tests/data" "tests/conftest.py" "tests/__init__.py" "src/*.py" "setup.py" "setup.cfg" "buildspec-localmodetests.yml"
-      - ./ci-scripts/displaytime.sh 'py27,py37 local mode' $start_time
+      - execute-command-if-has-matching-changes "tox -e py37 -- tests/integ -m local_mode --durations 50" "tests/integ" "tests/data" "tests/conftest.py" "tests/__init__.py" "src/*.py" "setup.py" "setup.cfg" "buildspec-localmodetests.yml"
+      - ./ci-scripts/displaytime.sh 'py37 local mode' $start_time

buildspec-release.yml

@@ -18,7 +18,7 @@ phases:
       # run unit tests
       - AWS_ACCESS_KEY_ID= AWS_SECRET_ACCESS_KEY= AWS_SESSION_TOKEN=
         AWS_CONTAINER_CREDENTIALS_RELATIVE_URI= AWS_DEFAULT_REGION=
-        tox -e py27,py36,py37 -- tests/unit
+        tox -e py36,py37 -- tests/unit
 
       # run a subset of the integration tests
       - IGNORE_COVERAGE=- tox -e py36 -- tests/integ -m canary_quick -n 64 --boxed --reruns 2

buildspec-unittests.yml

@@ -20,10 +20,3 @@ phases:
         AWS_CONTAINER_CREDENTIALS_RELATIVE_URI= AWS_DEFAULT_REGION=
         tox -e py36,py37 --parallel all -- tests/unit
       - ./ci-scripts/displaytime.sh 'py36,py37 unit' $start_time
-
-      # Remove once https://github.com/aws/sagemaker-python-sdk/issues/1461 is addressed.
-      - start_time=`date +%s`
-      - AWS_ACCESS_KEY_ID= AWS_SECRET_ACCESS_KEY= AWS_SESSION_TOKEN=
-        AWS_CONTAINER_CREDENTIALS_RELATIVE_URI= AWS_DEFAULT_REGION=
-        IGNORE_COVERAGE=- tox -e py27 --parallel all -- tests/unit
-      - ./ci-scripts/displaytime.sh 'py27 unit' $start_time

setup.py

@@ -15,7 +15,6 @@
 
 import os
 from glob import glob
-import sys
 
 from setuptools import setup, find_packages
 
@@ -77,10 +76,6 @@ def read_version():
     ],
 )
 
-# enum is introduced in Python 3.4. Installing enum back port
-if sys.version_info < (3, 4):
-    required_packages.append("enum34>=1.1.6")
-
 setup(
     name="sagemaker",
     version=read_version(),
@@ -99,7 +94,6 @@ def read_version():
         "Natural Language :: English",
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
     ],

src/sagemaker/__init__.py

@@ -13,8 +13,6 @@
 """Placeholder docstring"""
 from __future__ import absolute_import
 
-import logging
-import sys
 import importlib_metadata
 
 from sagemaker import estimator, parameter, tuner  # noqa: F401
@@ -63,10 +61,3 @@
 from sagemaker.automl.candidate_estimator import CandidateEstimator, CandidateStep  # noqa: F401
 
 __version__ = importlib_metadata.version("sagemaker")
-
-if sys.version[0] == "2":
-    logging.getLogger("sagemaker").warning(
-        "SageMaker Python SDK v2 will no longer support Python 2. "
-        "Please see https://github.com/aws/sagemaker-python-sdk/issues/1459 "
-        "for more information"
-    )

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = black-format,flake8,pylint,twine,sphinx,doc8,py27,py36,py37,py38
+envlist = black-format,flake8,pylint,twine,sphinx,doc8,py36,py37,py38
 
 skip_missing_interpreters = False
 
@@ -19,7 +19,6 @@ exclude =
     .tox
     tests/data/
     venv/
-    *service_pb2_grpc.py
 
 max-complexity = 10
 
@@ -66,10 +65,6 @@ commands =
     {env:IGNORE_COVERAGE:} coverage report --fail-under=86
 extras = test
 
-[testenv:py27]
-setenv =
-    IGNORE_COVERAGE = -
-
 [testenv:flake8]
 basepython = python3
 skipdist = true