add new library

README.md

+# diff
+
+python library
+
+[![Circle CI](https://circleci.com/gh/littichai/fas/tree/develop.svg?style=svg)](https://circleci.com/gh/littichai/fas/tree/develop)

circle.yml

+# CircleCI Configuration file
+
+machine:
+  python:
+      version: 2.7.11
+
+general:
+  artifacts:
+     - "dist"
+     - "cover"
+
+dependencies:
+  override:
+    - pip install tox tox-pyenv
+    - pyenv local 2.7.11 3.5.1  # Should correspond to pre-installed Python versions on CircleCI
+
+test:
+  override:
+     - tox
+
+deployment:
+  pypi:
+    tag: /[0-9]+(\.[0-9]+)*/
+    owner: littichai
+    commands:
+      - echo "[distutils]" > ~/.pypirc
+      - echo "index-servers =" >> ~/.pypirc
+      - echo "    pypi" >> ~/.pypirc
+      - echo >> ~/.pypirc
+      - echo "[pypi]" >> ~/.pypirc
+      - echo "username:$PYPI_USERNAME" >> ~/.pypirc
+      - echo "password:$PYPI_PASSWORD" >> ~/.pypirc
+      - echo >> ~/.pypirc
+      - python setup.py register -r pypi
+      - python setup.py sdist upload -r pypi

diff/diff.py

+from math import e
+def f(x):return e**(-x)
+def second (f,x=1,h=0.001):
+    return (f(x+h)-2*f(x)+f(x-h))/(h**2)

diff/tests/test_example.py

+"""
+Example test.
+
+"""
+from hamcrest import (
+    assert_that,
+    equal_to,
+    is_,
+)
+
+
+def test_math():
+    assert_that(1 + 1, is_(equal_to(2)))

setup.cfg

+[flake8]
+max-line-length = 120
+max-complexity = 15

setup.py

+#!/usr/bin/env python
+from setuptools import find_packages, setup
+
+project = "diff"
+version = "0.1.0"
+
+setup(
+    name=project,
+    version=version,
+    description="python library",
+    author="littichai",
+    author_email="littichai.bu.59@ubu.ac.th",
+    url="https://github.com/littichai/fas",
+    packages=find_packages(exclude=["*.tests", "*.tests.*", "tests.*", "tests"]),
+    include_package_data=True,
+    zip_safe=False,
+    install_requires=[
+    ],
+    setup_requires=[
+        "nose>=1.3.6",
+    ],
+    dependency_links=[
+    ],
+    entry_points={
+    },
+    tests_require=[
+        "coverage>=3.7.1",
+        "mock>=1.0.1",
+        "PyHamcrest>=1.8.5",
+    ],
+)

tox.ini

+[tox]
+envlist = py27, py35, lint
+
+[testenv]
+commands =
+    python setup.py nosetests --with-coverage --cover-package=diff --cover-erase --cover-html
+    python setup.py sdist
+deps =
+    setuptools>=17.1
+
+[testenv:lint]
+commands=flake8 diff
+basepython=python2.7
+deps=
+    flake8
+    flake8-print