add files

.circleci/config.yml

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+version: 2
+jobs:
+  test-2.7: &test-template
+    docker:
+      - image: circleci/python:2.7-jessie
+
+    working_directory: ~/repo
+
+    steps:
+      - checkout
+
+      - run:
+          name: create virtualenv
+          command: |
+            python -m virtualenv env
+
+      - run:
+          name: install python dependencies
+          command: |
+            . env/bin/activate
+            python --version
+            pip install -r requirements.txt
+
+      - run:
+          name: run unittests
+          command: |
+            . env/bin/activate
+            python --version
+            coverage run -m unittest discover
+
+      - run:
+          name: codecov
+          command: |
+            . env/bin/activate
+            # todo: uncomment below when the repository becomes public
+            #codecov
+
+  test-3.4:
+    <<: *test-template
+    docker:
+      - image: circleci/python:3.4-jessie
+
+  test-3.5:
+    <<: *test-template
+    docker:
+      - image: circleci/python:3.5-jessie
+
+  test-3.6:
+    <<: *test-template
+    docker:
+      - image: circleci/python:3.6-jessie
+
+  test-3.7:
+    <<: *test-template
+    docker:
+      - image: circleci/python:3.7-stretch
+
+  test-doc:
+    docker:
+      - image: circleci/python:3.6-jessie
+
+    working_directory: ~/repo
+
+    steps:
+      - run:
+          name: install graphviz and pandoc
+          command: |
+            sudo apt-get install graphviz
+            sudo apt-get install pandoc
+
+      - checkout
+
+      - run:
+          name: create virtualenv
+          command: |
+            python -m virtualenv env
+
+      - run:
+          name: install sphinx and dependencies
+          command: |
+            . env/bin/activate
+            pip install -r requirements.txt
+            pip install sphinx
+            pip install sphinx_rtd_theme
+
+      - run:
+          name: test doc build
+          command: |
+            . env/bin/activate
+            sphinx-build -W -b html docs docs/_build/html
+
+      - run:
+          name: run doctest
+          command: |
+            . env/bin/activate
+            make doctest
+
+workflows:
+  version: 2
+  tests:
+    jobs:
+      - test-2.7
+      - test-3.4
+      - test-3.5
+      - test-3.6
+      - test-3.7
+      - test-doc

.coveragerc

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+[run]
+# omit virtualenv
+omit = venv/*
+source=pyqubo

.gitignore

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+# PyCharm
+.idea/
+
+### macOS ###
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+.pytest_cache/
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+docs/.doctrees/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+
+### Python.VirtualEnv Stack ###
+# Virtualenv
+# http://iamzed.com/2009/05/07/a-primer-on-virtualenv/
+[Bb]in
+[Ii]nclude
+[Ll]ib
+[Ll]ib64
+[Ll]ocal
+[Ss]cripts
+pyvenv.cfg
+pip-selfcheck.json