[PYTHON] A note about doing the Pyramid tutorial

I wanted to know a little more about Pyramid and [Tutorial](http://docs.pylonsproject.org/projects/ pyramid / en / latest / quick_tutorial / index.html) I tried. It is a memo of the stumbled part.

Prelude: Quick Project Startup with Scaffolds

I intended to follow the procedure, but I got an error.

% pserve development.ini --reload
Starting subprocess with file monitor
Traceback (most recent call last):
  File "/usr/local/bin/pserve", line 9, in <module>
    load_entry_point('pyramid', 'console_scripts', 'pserve')()
  File "/usr/local/lib/python2.7/site-packages/pyramid/scripts/pserve.py", line 60, in main
    return command.run()
  File "/usr/local/lib/python2.7/site-packages/pyramid/scripts/pserve.py", line 371, in run
    global_conf=vars)
  File "/usr/local/lib/python2.7/site-packages/pyramid/scripts/pserve.py", line 406, in loadapp
    return loadapp(app_spec, name=name, relative_to=relative_to, **kw)
  File "/usr/local/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 247, in loadapp
    return loadobj(APP, uri, name=name, **kw)
  File "/usr/local/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 271, in loadobj
    global_conf=global_conf)
  File "/usr/local/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 296, in loadcontext
    global_conf=global_conf)
  File "/usr/local/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 320, in _loadconfig
    return loader.get_context(object_type, name, global_conf)
  File "/usr/local/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 454, in get_context
    section)
  File "/usr/local/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 476, in _context_from_use
    object_type, name=use, global_conf=global_conf)
  File "/usr/local/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 406, in get_context
    global_conf=global_conf)
  File "/usr/local/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 296, in loadcontext
    global_conf=global_conf)
  File "/usr/local/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 328, in _loadegg
    return loader.get_context(object_type, name, global_conf)
  File "/usr/local/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 620, in get_context
    object_type, name=name)
  File "/usr/local/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 640, in find_egg_entry_point
    pkg_resources.require(self.spec)
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 968, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 854, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'scaffolds' distribution was not found and is required by the application

The cause was that something other than pyramid installed in virtualenv was used.

% which pserve
/usr/local/bin/pserve

Once I uninstalled the pyramid that was installed on my system and the virtualenv one was used, the above error no longer occurred. See also

% which pserve
/Users/mkisono/.pyenv/shims/pserve