Removing testing and support for Python 2.6

.appveyor.yml

@@ -4,8 +4,7 @@ environment:
 
     # For Python versions available on Appveyor, see
     # http://www.appveyor.com/docs/installed-software#python
-    # The list here is complete (excluding Python 2.6, which
-    # isn't covered by this document) at the time of writing.
+    # The list here is complete at the time of writing.
 
     - PYTHON_VERSION: 2.7
       #PYTHON: "C:\\Python27"
@@ -78,7 +77,6 @@ install:
   - conda config --set auto_update_conda false
   #
   - "%CONDAFORGE% setuptools pip"
-  - "IF %PYTHON_VERSION%==2.6 (python -m pip install ordereddict)"
   - python -m pip install coverage
   - python -m pip install codecov
   - IF DEFINED YAML (python -m pip install pyyaml)
@@ -87,7 +85,7 @@ install:
   - python -m pip install openpyxl
   - python -m pip install sphinx_rtd_theme
   - "%ANACONDA% pandas networkx"
-  - "IF NOT %PYTHON_VERSION%==2.6 (%ANACONDA% scipy)"
+  - "%ANACONDA% scipy"
   #
   # Install GAMS
   #

.travis.yml

@@ -1,9 +1,6 @@
 language: python
 matrix:
   include:
-    # NOTE: EXTRAS is not yet supported on Python 2.6.
-    - python: '2.6'
-      env:                             CATEGORY="nightly"
     - python: '2.7'
       env:                             CATEGORY="nightly"
     - python: '3.6'
@@ -72,11 +69,6 @@ install:
   - which pip
   - pip --version
   #
-  - if [ "${TRAVIS_PYTHON_VERSION}" == "2.6" ]; then pip install 'cryptography<2.1.1'; fi
-  - if [ "${TRAVIS_PYTHON_VERSION}" == "2.6" ]; then pip install 'pyOpenSSL<17.5'; fi
-  - if [ "${TRAVIS_PYTHON_VERSION}" == "2.6" ]; then pip install urllib3; fi
-  - if [ "${TRAVIS_PYTHON_VERSION}" == "2.6" ]; then pip install ordereddict; fi
-  #
   - pip install coverage
   - pip install codecov
   - if [ -n "${YAML}" ]; then
@@ -91,7 +83,7 @@ install:
   - pip install dill
   - conda install -q -y -c anaconda pandas networkx
 
-  - if [ "${TRAVIS_PYTHON_VERSION}" != "2.6" -a -n "${EXTRAS}" ]; then
+  - if [ -n "${EXTRAS}" ]; then
        conda install -q -y -c anaconda scipy;
     fi
 
@@ -101,9 +93,9 @@ install:
   - wget https://d37drm4t2jghv5.cloudfront.net/distributions/24.8.5/linux/linux_x64_64_sfx.exe
   - chmod u+x linux_x64_64_sfx.exe
   - ./linux_x64_64_sfx.exe > /dev/null
-  # Only install GAMS API if EXTRAS is not being installed and Python is
-  # not 2.6, since those tests segfault on travis for an unknown reason.
-  - if [ "${TRAVIS_PYTHON_VERSION}" != "2.6" -a -z "${EXTRAS}" ]; then
+  # Only install GAMS API if EXTRAS is not being installed, 
+  # since those tests segfault on travis for an unknown reason.
+  - if [ -a -z "${EXTRAS}" ]; then
        bash ./.travis_install_gams_api.sh;
     fi
   - export PATH="$PATH:$PWD/gams24.8_linux_x64_64_sfx"

.travis_install_gams_api.sh

@@ -2,11 +2,6 @@
 # Install GAMS-Python API bindings
 # No explicit API version for python 3.5, use 3.4
 #
-if [ "${TRAVIS_PYTHON_VERSION}" = "2.6" ]; then
-   pushd $PWD/gams24.8_linux_x64_64_sfx/apifiles/Python/api_26;
-   python setup.py install;
-   popd;
-fi
 if [ "${TRAVIS_PYTHON_VERSION}" = "2.7" ]; then
    pushd $PWD/gams24.8_linux_x64_64_sfx/apifiles/Python/api;
    python setup.py install;

CHANGELOG.txt

@@ -6,9 +6,10 @@ Pyomo CHANGELOG
 Current Development
 -------------------------------------------------------------------------------
 
-- Resolved Python 3.4 build errors on Appveyor.
+- Resolved Python 3.4 build errors on Appveyor. (#438)
 - Wrap Vars in value() for assignment to numpy vectors (#436)
 - Adding TerminationCondition and SolverStatus to pyomo.environ (#429)
+- Removing testing for Python 2.6 (#322)
 
 -------------------------------------------------------------------------------
 Pyomo 5.5

admin/jenkins.py

@@ -12,11 +12,7 @@
 import sys
 import os
 import subprocess
-try:
-    from subprocess import check_output as _run_cmd
-except:
-    # python 2.6
-    from subprocess import check_call as _run_cmd
+from subprocess import check_output as _run_cmd
 import driver
 
 config = sys.argv[1]

doc/OnlineDocs/getting_started/index.rst

@@ -1,9 +1,58 @@
 Getting Started
 ===============
 
-Installation, pyomo command, a simple example, etc
+Installation
+------------
 
-.. doctest::
+Pyomo currently supports the following versions of Python:
+
+* CPython: 2.7, 3.5, 3.6
+
+
+Using CONDA
+~~~~~~~~~~~
+
+We recommend installation with *conda*, which is included with the Anaconda
+distribution of Python.  If you have a different Python distribution, then
+you can install *miniconda* using *pip*:
+
+.. bash::
+    pip install miniconda
+
+You can install Pyomo in your system Python installation
+by executing the following in a shell:
+
+.. bash::
+    conda install -c conda-forge pyomo
+
+Pyomo also has conditional dependencies on a variety of third-party Python packages.  These can also be installed with conda:
+
+.. bash::
+    conda install -c conda-forge pyomo.extras
+
+Optimization solvers are not installed with Pyomo, but some open source optimization solvers can be installed with conda as well:
+
+.. bash::
+    conda install -c conda-forge pyomo.solvers
+
+
+Using PIP
+~~~~~~~~~
+
+The standard utility for installing Python packages is *pip*.  You
+can install Pyomo in your system Python installation by executing
+the following in a shell:
+
+.. bash::
+    pip install pyomo
+
+However, *pip* does not support the robust installation of conditional
+dependencies (i.e. the third-party Python packages or the solvers
+that Pyomo may use).
+
+
+A Simple Example
+----------------
+
+TODO pyomo command, importing pyomo, using NEOS, etc
 
-    >>> print('Hello World')
-    Hello World

scripts/pyomo_install

@@ -22,9 +22,9 @@ except ImportError:
     from urllib import pathname2url as pathname2url
 
 
-if sys.version_info < (2, 6):
+if sys.version_info < (2, 7):
     print('ERROR: %s' % sys.exc_info()[1])
-    print('ERROR: This script requires Python 2.6 or greater.')
+    print('ERROR: This script requires Python 2.7 or greater.')
     sys.exit(1)
 
 #

setup.py

@@ -81,7 +81,6 @@ def read(*rnames):
         'Operating System :: Unix',
         'Programming Language :: Python',
         'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.4',
@@ -95,6 +94,7 @@ def read(*rnames):
       packages=packages,
       keywords=['optimization'],
       install_requires=requires,
+      python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*',
       entry_points="""
         [console_scripts]
         runbenders=pyomo.pysp.benders:Benders_main