Move forward and drop python < 3.5. Version 2.0 (#63)

* No six magic anymore.
* All typehints is embedded.
* Less requirements, simple code.

Signed-off-by: Alexey Stepanov <penguinolog@gmail.com>

.travis.yml

@@ -2,13 +2,10 @@ sudo: false
 language: python
 os: linux
 python:
-- 2.7
-- 3.4
 - 3.5
 - 3.6
 - &mainstream_python 3.7-dev
-- &pypy pypy
-- pypy3.5
+- &pypy pypy3.5
 install:
 - &upgrade_python_toolset pip install --upgrade pip setuptools wheel
 - pip install tox-travis

CI_REQUIREMENTS.txt

@@ -1,4 +1,2 @@
 mock  # no assert_called_once in py35
-futures>=3.1; python_version == "2.7"
-enum34>=1.1; python_version == "2.7"
 -r requirements.txt

README.rst

@@ -42,14 +42,13 @@ Pros:
 
 ::
 
-    Python 2.7
-    Python 3.4
     Python 3.5
     Python 3.6
     Python 3.7
-    PyPy
     PyPy3 3.5+
 
+.. note:: For Python 2.7, 3.4 and PyPy please use versions 1.x.x
+
 This package includes:
 
 * `SSHClient` - historically the first one helper, which used for SSH connections and requires memorization

appveyor.yml

@@ -4,22 +4,6 @@ environment:
     secure: TCKGf77kkVeo2Pbd+lQY5Q==
 
   matrix:
-    - PYTHON: "C:\\Python27"
-      PYTHON_VERSION: "2.7.x" # currently 2.7.11
-      PYTHON_ARCH: "32"
-
-    - PYTHON: "C:\\Python27-x64"
-      PYTHON_VERSION: "2.7.x" # currently 2.7.11
-      PYTHON_ARCH: "64"
-
-    - PYTHON: "C:\\Python34"
-      PYTHON_VERSION: "3.4.x" # currently 3.4.3
-      PYTHON_ARCH: "32"
-
-    - PYTHON: "C:\\Python34-x64"
-      PYTHON_VERSION: "3.4.x" # currently 3.4.3
-      PYTHON_ARCH: "64"
-
     - PYTHON: "C:\\Python35"
       PYTHON_VERSION: "3.5.x" # currently 3.5.1
       PYTHON_ARCH: "32"

exec_helpers/__init__.py

@@ -14,8 +14,6 @@
 
 """Execution helpers for simplified usage of subprocess and ssh."""
 
-from __future__ import absolute_import
-
 from .proc_enums import ExitCodes
 
 from .exceptions import (
@@ -48,7 +46,7 @@
     'ExecResult',
 )
 
-__version__ = '1.3.6'
+__version__ = '2.0.0'
 __author__ = "Alexey Stepanov"
 __author_email__ = 'penguinolog@gmail.com'
 __maintainers__ = {

exec_helpers/_log_templates.py

@@ -16,10 +16,6 @@
 
 """Text templates for logging."""
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
-
 CMD_EXEC = "Executing command:\n{cmd!r}\n"
 
 CMD_WAIT_ERROR = (