Cannot install flexer in new virtualenv - Missing module "six"

[HelloKashif]

There has been some changes in setuptools causing this issue.

Steps

1. Create a new virtualenv: $ virtualenv --no-site-packages .env
2. Source env: source .env/bin/activate
3. Try pip installing flexer: pip install flexer

Result: ImportError: No module named six

Trace:
Collecting flexer
Downloading flexer-1.2.2.tar.gz
Collecting click (from flexer)
Using cached click-6.7-py2.py3-none-any.whl
Collecting jinja2>=2.9.4 (from flexer)
Using cached Jinja2-2.9.6-py2.py3-none-any.whl
Collecting jsonschema==2.4.0 (from flexer)
Downloading jsonschema-2.4.0-py2.py3-none-any.whl
Collecting requests (from flexer)
Downloading requests-2.17.3-py2.py3-none-any.whl (87kB)
100% |████████████████████████████████| 92kB 4.8MB/s
Collecting pyyaml (from flexer)
Collecting MarkupSafe>=0.23 (from jinja2>=2.9.4->flexer)
Collecting certifi>=2017.4.17 (from requests->flexer)
Using cached certifi-2017.4.17-py2.py3-none-any.whl
Collecting chardet<3.1.0,>=3.0.2 (from requests->flexer)
Downloading chardet-3.0.3-py2.py3-none-any.whl (133kB)
100% |████████████████████████████████| 143kB 3.6MB/s
Collecting urllib3<1.22,>=1.21.1 (from requests->flexer)
Using cached urllib3-1.21.1-py2.py3-none-any.whl
Collecting idna<2.6,>=2.5 (from requests->flexer)
Using cached idna-2.5-py2.py3-none-any.whl
Building wheels for collected packages: flexer
Running setup.py bdist_wheel for flexer ... error
Complete output from command /Users/kashif/Projects/CMP/ServiceCatalog/.env/bin/python2.7 -u -c "import setuptools, tokenize;file='/private/var/folders/n4/23kvlbpn77v8mg1fg3k72f580000gn/T/pip-build-HovhxP/flexer/setup.py';f=getattr(tokenize, 'open', open)(file);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, file, 'exec'))" bdist_wheel -d /var/folders/n4/23kvlbpn77v8mg1fg3k72f580000gn/T/tmpZsV68vpip-wheel- --python-tag cp27:
/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py:251: UserWarning: 'licence' distribution option is deprecated; use 'license'
warnings.warn(msg)
running bdist_wheel
running build
running build_py
creating build
creating build/lib
creating build/lib/flexer
copying flexer/init.py -> build/lib/flexer
copying flexer/cli.py -> build/lib/flexer
copying flexer/commands.py -> build/lib/flexer
copying flexer/config.py -> build/lib/flexer
copying flexer/context.py -> build/lib/flexer
copying flexer/module_template.py -> build/lib/flexer
copying flexer/runner.py -> build/lib/flexer
copying flexer/utils.py -> build/lib/flexer
creating build/lib/flexer/clients
copying flexer/clients/init.py -> build/lib/flexer/clients
copying flexer/clients/cmp.py -> build/lib/flexer/clients
copying flexer/clients/nflex.py -> build/lib/flexer/clients
creating build/lib/flexer/connector_tests
copying flexer/connector_tests/init.py -> build/lib/flexer/connector_tests
copying flexer/connector_tests/test_base.py -> build/lib/flexer/connector_tests
creating build/lib/flexer/validation
copying flexer/validation/init.py -> build/lib/flexer/validation
running egg_info
writing requirements to flexer.egg-info/requires.txt
writing flexer.egg-info/PKG-INFO
writing top-level names to flexer.egg-info/top_level.txt
writing dependency_links to flexer.egg-info/dependency_links.txt
writing entry points to flexer.egg-info/entry_points.txt
reading manifest file 'flexer.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'flexer.egg-info/SOURCES.txt'
creating build/lib/flexer/templates
creating build/lib/flexer/templates/metric_connector
copying flexer/templates/metric_connector/main.py.j2 -> build/lib/flexer/templates/metric_connector
copying flexer/templates/metric_connector/test-data.json.j2 -> build/lib/flexer/templates/metric_connector
creating build/lib/flexer/templates/resource_connector
copying flexer/templates/resource_connector/main.py.j2 -> build/lib/flexer/templates/resource_connector
creating build/lib/flexer/templates/test
copying flexer/templates/test/main.py.j2 -> build/lib/flexer/templates/test
copying flexer/validation/get_logs.json -> build/lib/flexer/validation
copying flexer/validation/get_metrics.json -> build/lib/flexer/validation
copying flexer/validation/get_resources.json -> build/lib/flexer/validation
copying flexer/validation/monitors.json -> build/lib/flexer/validation
installing to build/bdist.macosx-10.12-x86_64/wheel
running install
running install_lib
creating build/bdist.macosx-10.12-x86_64
creating build/bdist.macosx-10.12-x86_64/wheel
creating build/bdist.macosx-10.12-x86_64/wheel/flexer
copying build/lib/flexer/init.py -> build/bdist.macosx-10.12-x86_64/wheel/flexer
copying build/lib/flexer/cli.py -> build/bdist.macosx-10.12-x86_64/wheel/flexer
creating build/bdist.macosx-10.12-x86_64/wheel/flexer/clients
copying build/lib/flexer/clients/init.py -> build/bdist.macosx-10.12-x86_64/wheel/flexer/clients
copying build/lib/flexer/clients/cmp.py -> build/bdist.macosx-10.12-x86_64/wheel/flexer/clients
copying build/lib/flexer/clients/nflex.py -> build/bdist.macosx-10.12-x86_64/wheel/flexer/clients
copying build/lib/flexer/commands.py -> build/bdist.macosx-10.12-x86_64/wheel/flexer
copying build/lib/flexer/config.py -> build/bdist.macosx-10.12-x86_64/wheel/flexer
creating build/bdist.macosx-10.12-x86_64/wheel/flexer/connector_tests
copying build/lib/flexer/connector_tests/init.py -> build/bdist.macosx-10.12-x86_64/wheel/flexer/connector_tests
copying build/lib/flexer/connector_tests/test_base.py -> build/bdist.macosx-10.12-x86_64/wheel/flexer/connector_tests
copying build/lib/flexer/context.py -> build/bdist.macosx-10.12-x86_64/wheel/flexer
copying build/lib/flexer/module_template.py -> build/bdist.macosx-10.12-x86_64/wheel/flexer
copying build/lib/flexer/runner.py -> build/bdist.macosx-10.12-x86_64/wheel/flexer
creating build/bdist.macosx-10.12-x86_64/wheel/flexer/templates
creating build/bdist.macosx-10.12-x86_64/wheel/flexer/templates/metric_connector
copying build/lib/flexer/templates/metric_connector/main.py.j2 -> build/bdist.macosx-10.12-x86_64/wheel/flexer/templates/metric_connector
copying build/lib/flexer/templates/metric_connector/test-data.json.j2 -> build/bdist.macosx-10.12-x86_64/wheel/flexer/templates/metric_connector
creating build/bdist.macosx-10.12-x86_64/wheel/flexer/templates/resource_connector
copying build/lib/flexer/templates/resource_connector/main.py.j2 -> build/bdist.macosx-10.12-x86_64/wheel/flexer/templates/resource_connector
creating build/bdist.macosx-10.12-x86_64/wheel/flexer/templates/test
copying build/lib/flexer/templates/test/main.py.j2 -> build/bdist.macosx-10.12-x86_64/wheel/flexer/templates/test
copying build/lib/flexer/utils.py -> build/bdist.macosx-10.12-x86_64/wheel/flexer
creating build/bdist.macosx-10.12-x86_64/wheel/flexer/validation
copying build/lib/flexer/validation/init.py -> build/bdist.macosx-10.12-x86_64/wheel/flexer/validation
copying build/lib/flexer/validation/get_logs.json -> build/bdist.macosx-10.12-x86_64/wheel/flexer/validation
copying build/lib/flexer/validation/get_metrics.json -> build/bdist.macosx-10.12-x86_64/wheel/flexer/validation
copying build/lib/flexer/validation/get_resources.json -> build/bdist.macosx-10.12-x86_64/wheel/flexer/validation
copying build/lib/flexer/validation/monitors.json -> build/bdist.macosx-10.12-x86_64/wheel/flexer/validation
running install_egg_info
Copying flexer.egg-info to build/bdist.macosx-10.12-x86_64/wheel/flexer-1.2.2-py2.7.egg-info
running install_scripts
Traceback (most recent call last):
File "", line 1, in
File "/private/var/folders/n4/23kvlbpn77v8mg1fg3k72f580000gn/T/pip-build-HovhxP/flexer/setup.py", line 40, in
'Topic :: Software Development',
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 151, in setup
dist.run_commands()
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 953, in run_commands
self.run_command(cmd)
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 972, in run_command
cmd_obj.run()
File "/Users/kashif/Projects/CMP/ServiceCatalog/.env/lib/python2.7/site-packages/wheel/bdist_wheel.py", line 235, in run
self.run_command('install')
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/cmd.py", line 326, in run_command
self.distribution.run_command(command)
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 972, in run_command
cmd_obj.run()
File "/Users/kashif/Projects/CMP/ServiceCatalog/.env/lib/python2.7/site-packages/setuptools/command/install.py", line 61, in run
return orig.install.run(self)
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/command/install.py", line 575, in run
self.run_command(cmd_name)
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/cmd.py", line 326, in run_command
self.distribution.run_command(command)
File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 972, in run_command
cmd_obj.run()
File "/Users/kashif/Projects/CMP/ServiceCatalog/.env/lib/python2.7/site-packages/setuptools/command/install_scripts.py", line 17, in run
import setuptools.command.easy_install as ei
File "/Users/kashif/Projects/CMP/ServiceCatalog/.env/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 49, in
from setuptools.py27compat import rmtree_safe
File "/Users/kashif/Projects/CMP/ServiceCatalog/.env/lib/python2.7/site-packages/setuptools/py27compat.py", line 7, in
import six
ImportError: No module named six

---

Need to add six in requirements.txt

[geodimm]

Hi guys,
That's actually a change in the python setuptools package and has nothing to do with flexer. In fact, if you try installing any package on a virtual environment you'd get the same error (see pypa/setuptools#964 or pypa/setuptools#942 for reference).
As mentioned in one of the issues above, a workaround is:

pip install setuptools==33.1.1
pip install flexer