Isolated development in python
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The document outlines steps for isolated Python development using pip and virtualenv, including package installation commands and requirements management. It describes unit testing with the Nose framework and provides examples of test functions and setup. Additionally, it details packaging Python projects into eggs with setup.py scripts, emphasizing dependency management and project structure.
![Python eggs: complex setup.py
import re
from setuptools import setup, find_packages
from os import path
def parse_requirements(file_name):
requirements = []
for line in open(file_name, 'r').read().split('n'):
if re.match(r'(s*#)|(s*$)', line):
continue
if re.match(r's*-es+', line):
requirements.append(re.sub(r's*-es+.*#egg=(.*)$', r'1', line))
elif re.match(r's*-fs+', line):
pass
else:
requirements.append(line)
return requirements
.... continue ....](https://image.slidesharecdn.com/isolateddevelopmentinpython-130411101837-phpapp02/85/Isolated-development-in-python-30-320.jpg)
![Python eggs: complex setup.py
def parse_dependency_links(file_name):
dependency_links = []
for line in open(file_name, 'r').read().split('n'):
if re.match(r's*-[ef]s+', line):
dependency_links.append(re.sub(r's*-[ef]s+', '', line))
return dependency_links
def get_file_contents(filename):
fd = file(path.join(path.dirname(__file__), filename), "r")
content = fd.read()
fd.close()
return content
.... continue ....](https://image.slidesharecdn.com/isolateddevelopmentinpython-130411101837-phpapp02/85/Isolated-development-in-python-31-320.jpg)
![Python eggs: complex setup.py
setup(
name = "mico",
version = "0.1",
description = "A monkey driven cloud management",
long_description=get_file_contents("README.rst"),
author='Andres J. Diaz',
author_email='ajdiaz@connectical.com',
url='http://ajdiaz.github.com/mico',
packages=find_packages(),
install_requires = parse_requirements('requirements.txt'),
dependency_links = parse_dependency_links('requirements.txt'),
entry_points={
'console_scripts': [
'mico = mico.scripts.cmdline:main',
]
},
classifiers=[
'Development Status :: 4 - Beta',
'Intended Audience :: Developers',
'License :: OSI Approved :: GNU General Public License (GPL)',
'Operating System :: OS Independent',
'Programming Language :: Python',
],
)](https://image.slidesharecdn.com/isolateddevelopmentinpython-130411101837-phpapp02/85/Isolated-development-in-python-32-320.jpg)
![Python eggs: complex setup.py
setup(
name = "mico",
version = "0.1",
description = "A monkey driven cloud management",
long_description=get_file_contents("README.rst"),
author='Andres J. Diaz',
author_email='ajdiaz@connectical.com',
url='http://ajdiaz.github.com/mico',
packages=find_packages(),
install_requires = parse_requirements('requirements.txt'),
dependency_links = parse_dependency_links('requirements.txt'),
entry_points={
'console_scripts': [
'mico = mico.scripts.cmdline:main',
]
},
classifiers=[
'Development Status :: 4 - Beta',
'Intended Audience :: Developers',
'License :: OSI Approved :: GNU General Public License (GPL)',
'Operating System :: OS Independent',
'Programming Language :: Python',
],
)](https://image.slidesharecdn.com/isolateddevelopmentinpython-130411101837-phpapp02/85/Isolated-development-in-python-33-320.jpg)
Isolated development in python
- 1. Isolated Development in Python
- 3. pip installer $ pip install <package>
- 4. pip installer $ pip install <package> Download package from pypi.python.org
- 5. pip installer $ pip install <package> Download package from pypi.python.org $ pip install <directory> $ pip install <tar.gz>
- 6. pip installer $ pip install <gitrepo>
- 7. pip installer $ pip install <gitrepo> GREAT!!
- 8. pip installer $ pip install <gitrepo> GREAT!! $ pip install git+git://github.com/ajdiaz/mole $ pip install git+ssh://github.com/ajdiaz/mole $ pip install git+git://github.com/ajdiaz/mole@840d25 $ pip install git+git://github.com/ajdiaz/mole@devel-branch $ pip install git+git://....@devel-branch#egg=Mole
- 9. pip installer $ pip freeze
- 10. pip installer $ pip freeze Fabric==1.5.2 GitPython==0.3.2.RC1 Jinja2==2.6 Pygments==1.6 Sphinx==1.2b1 Create requirements.txt argparse==1.2.1 async==0.6.1 boto==2.7.0 cuisine==0.5.1 distribute==0.6.24 docutils==0.10 gitdb==0.5.4 mico==0 paramiko==1.9.0 pycrypto==2.6 smmap==0.8.2 wsgiref==0.1.2
- 11. 2. Virtualenv: a jail for python
- 12. Virtualenv: the python jail $ virtualenv --python=/usr/bin/python2.7 mynewenvironment
- 13. Virtualenv: the python jail $ virtualenv --python=/usr/bin/python2.7 mynewenvironment OR EVEN BETTER
- 14. Virtualenv: the python jail $ virtualenv --python=/usr/bin/python2.7 mynewenvironment OR EVEN BETTER $ mkvirtualenv --python=/usr/bin/python2.7 mynewenvironment
- 15. Virtualenv: the python jail $ virtualenv --python=/usr/bin/python2.7 mynewenvironment OR EVEN BETTER $ mkvirtualenv --python=/usr/bin/python2.7 mynewenvironment mkvirtualenvwrapper
- 17. Virtualenvwrapper $ mkvirtualenv test New python executable in test/bin/python Installing distribute...................................................................................................................... .......................................................................done. Installing pip...............done. virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/predeactivate virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/postdeactivate virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/preactivate virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/postactivate virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/get_env_details (test) $
- 18. Virtualenvwrapper $ mkvirtualenv test New python executable in test/bin/python Installing distribute...................................................................................................................... .......................................................................done. Installing pip...............done. virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/predeactivate virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/postdeactivate virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/preactivate virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/postactivate virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/get_env_details (test) $ which python /home/ajdiaz/env/test/bin/python
- 19. Virtualenvwrapper $ mkvirtualenv test New python executable in test/bin/python Installing distribute...................................................................................................................... .......................................................................done. Installing pip...............done. virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/predeactivate virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/postdeactivate virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/preactivate virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/postactivate virtualenvwrapper.user_scripts creating /home/ajdiaz/env/test/bin/get_env_details (test) $ which python /home/ajdiaz/env/test/bin/python yep, these are hooks!
- 20. Unit testing
- 21. Unit testing: nose class A(object): def __init__(self): self.value = "Some Value" def return_true(self): return True save it in a.py def raise_exc(self, val): raise KeyError(val)
- 22. Unit testing: nose from a import A from nose.tools import assert_equal from nose.tools import assert_not_equal from nose.tools import assert_raises from nose.tools import raises class TestA(object): @classmethod def setup_class(klass): """This method is run once for each class before any tests are run""" @classmethod def teardown_class(klass): """This method is run once for each class _after_ all tests are run""" def setUp(self): """This method is run once before _each_ test method is executed""" def teardown(self): """This method is run once after _each_ test method is executed""" .... continue ....
- 23. Unit testing: nose def test_init(self): a = A() assert_equal(a.value, "Some Value") assert_not_equal(a.value, "Incorrect Value") def test_return_true(self): a = A() assert_equal(a.return_true(), True) assert_not_equal(a.return_true(), False) def test_raise_exc(self): a = A() assert_raises(KeyError, a.raise_exc, "A value") @raises(KeyError) def test_raise_exc_with_decorator(self): a = A() a.raise_exc("A message") save it in tests/testa.py
- 24. Unit testing: nose $ nosetests -v tests/
- 25. Unit testing: nose $ nosetests -v tests/ testa.TestA.test_init ... ok testa.TestA.test_raise_exc ... ok testa.TestA.test_raise_exc_with_decorator ... ok testa.TestA.test_return_true ... ok --------------------------------------------------------- Ran 4 tests in 0.002s OK
- 26. Unit testing: Bonus: code coverage $ pip install coverage $ nosetests --with-coverage .... Name Stmts Miss Cover Missing ------------------------------------- a 8 0 100% ------------------------------------- Ran 4 tests in 0.006s OK
- 28. Python eggs: basic setup.py from setuptools import setup setup( name = "example", version = "1.0", description = "An example package", author='Andres J. Diaz' )
- 29. Python eggs: basic setup.py from setuptools import setup, find_packages setup( name = "example", version = "1.0", description = "An example package", author='Andres J. Diaz', packages=find_packages() )
- 30. Python eggs: complex setup.py import re from setuptools import setup, find_packages from os import path def parse_requirements(file_name): requirements = [] for line in open(file_name, 'r').read().split('n'): if re.match(r'(s*#)|(s*$)', line): continue if re.match(r's*-es+', line): requirements.append(re.sub(r's*-es+.*#egg=(.*)$', r'1', line)) elif re.match(r's*-fs+', line): pass else: requirements.append(line) return requirements .... continue ....
- 31. Python eggs: complex setup.py def parse_dependency_links(file_name): dependency_links = [] for line in open(file_name, 'r').read().split('n'): if re.match(r's*-[ef]s+', line): dependency_links.append(re.sub(r's*-[ef]s+', '', line)) return dependency_links def get_file_contents(filename): fd = file(path.join(path.dirname(__file__), filename), "r") content = fd.read() fd.close() return content .... continue ....
- 32. Python eggs: complex setup.py setup( name = "mico", version = "0.1", description = "A monkey driven cloud management", long_description=get_file_contents("README.rst"), author='Andres J. Diaz', author_email='ajdiaz@connectical.com', url='http://ajdiaz.github.com/mico', packages=find_packages(), install_requires = parse_requirements('requirements.txt'), dependency_links = parse_dependency_links('requirements.txt'), entry_points={ 'console_scripts': [ 'mico = mico.scripts.cmdline:main', ] }, classifiers=[ 'Development Status :: 4 - Beta', 'Intended Audience :: Developers', 'License :: OSI Approved :: GNU General Public License (GPL)', 'Operating System :: OS Independent', 'Programming Language :: Python', ], )
- 33. Python eggs: complex setup.py setup( name = "mico", version = "0.1", description = "A monkey driven cloud management", long_description=get_file_contents("README.rst"), author='Andres J. Diaz', author_email='ajdiaz@connectical.com', url='http://ajdiaz.github.com/mico', packages=find_packages(), install_requires = parse_requirements('requirements.txt'), dependency_links = parse_dependency_links('requirements.txt'), entry_points={ 'console_scripts': [ 'mico = mico.scripts.cmdline:main', ] }, classifiers=[ 'Development Status :: 4 - Beta', 'Intended Audience :: Developers', 'License :: OSI Approved :: GNU General Public License (GPL)', 'Operating System :: OS Independent', 'Programming Language :: Python', ], )
- 34. Applauses & questions Not necessarily in that order.