The NotFound and InternalError handlers are special... which is confusing when you want to use some of the other error handlers (like Forbidden or Unauthorized) in the same way.

I propose making them all a little more uniform. Here's an untested patch to illustrate my intent:
https://pastebin.com/TgB6LH5q

Cf: https://groups.google.com/group/webpy/browse_thread/thread/ea49983d0d839fa6?pli=1

from web import form
from web.utils import storify
f = form.Form(
        form.Checkbox('contact_me', checked=True,
description='spam_me')
)
f.fill(kw=dict()) # no adding.
assert '''checked="checked"''' in f.render()
f = form.Form(
        form.Checkbox('contact_me', checked=False,
description='spam_me')
)
f.fill(kw=dict()) # no adding.
assert '''checked="checked"''' not in f.render()
f.fill(kw=dict(contact_me=True)) # add it.
assert '''checked="checked"''' in f.render(), "didn't fill in"

'fill' is just a shorthand to 'valididates()', which doesn't know how to
do much except set the 'value' attribute.

I observe in my tests that indeed, submitted forms don't "stay"
checked. Validators just seem to look at the 'value' attribute, and
that is it. (cf. the _validate method).

The hackish solution is to wire in that "checked means value is valid"
thing yourself. Ugly though!

The reloader does not appear to reload external modules under lighttpd. The reloader works as expected under the dev server although you must ensure that the modules are imported as "import x" and not as "from y import x".

When using subapplications regexes, the top level url definitions behave differently then regexes in subapplications. This is an example based on code in https://webpy.org/cookbook/subapp.

blog.py:

import web
urls = (
  "", "reblog",
  "/(blog|Blog)", "blog"  #change from original
)
class reblog:
    def GET(self): raise web.seeother('/')
class blog:
    def GET(self, path):
        return "blog " + path
app_blog = web.application(urls, locals())

code.py

import web
import blog
urls = (
  "/(blog|Blog)", blog.app_blog,  #change from original
   #  "/blog", blog.app_blog,
  "/(.*)", "index"
)
class index:
    def GET(self, path):
        return "hello " + path
app = web.application(urls, locals())
if __name__ == "__main__":
    app.run()

The regex /(blog|Blog) is the same in blog.py and code.py however request GET https://localhost:1111/blog/Blog does not return the expected result. If the regex is commented out in code.py and replaced with the line below it GET request returns an expected result.

If the value attribute of a dropdown or radio button element is set to an integer and validation of the form containing that element fails the element's state is lost in the redisplayed form.

If the following form was submitted with the textbox left blank and the first radio button selected the form displayed after validation would show an empty textbox and no radio button selected.

simple_form = form.Form(
  form.Textbox('test',
    form.notnull,
  ),
  form.Radio('example',
    [1,2,3,4],
  )
)    

I think this happens because the form post is u/str and thus the value checks fail. Maybe this could be fixed by converting the values to strings for the test of equality in the render functions for these elements.

243c243
<             if self.value == value: select_p = ' selected="selected"'
---
>             if self.value == str(value): select_p = ' selected="selected"'
266c266
<             if self.value == arg:
---
>             if self.value == str(arg):

I used this example code to reproduce the error:

in the forms.py

result = data.all_categories() # this method return all records of table category in GAE/big table format.
args = [(row.key().id(), row.title) for row in result]
new_post = form.Form(

form.Dropdown('category', args), 
form.Textbox('title'), 
form.Textarea('text'), 
form.Dropdown('language', [('pt', 'Portuguese'), ('en', 

'English')]),

form.Button('Submit!') 

in code.py

class Post:

def GET(self): 
    frm = forms.new_post() 
    return render.full(render.form(frm)) 
def POST(self): 
    global last_updated 
    frm = forms.new_post() 
    if frm.validates(): # in this point the error.
        data.save_entry(frm.d) 
        last_updated = data.last_updated() 
        raise web.seeother('/') 
    else: 
        return render.full(render.form(frm)) 

IMHO the root cause of the problem is the 'big table' format, I say this because the form generated by the GET method is correct(It has the Category A, Category B) but when I submit the form and the forms.validates() is called the error occurs.

The problem is in the forms.py in this function:
def attrget(obj, attr, value=None):

if hasattr(obj, 'has_key') and obj.has_key(attr): return obj[attr] 
if hasattr(obj, attr): return getattr(obj, attr) 
return value 

generate this error:
: 'unicode' object has no attribute
'has_key'

  args = ("'unicode' object has no attribute 'has_key'",) 
  message = "'unicode' object has no attribute 'has_key'" 

Today I'm update my Debian server and got the error:

Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/web/wsgiserver/__init__.py", line 1174, in communicate
    req.respond()
  File "/usr/lib/pymodules/python2.6/web/wsgiserver/__init__.py", line 544, in respond
    self._respond()
  File "/usr/lib/pymodules/python2.6/web/wsgiserver/__init__.py", line 556, in _respond
    response = self.wsgi_app(self.environ, self.start_response)
  File "/usr/lib/pymodules/python2.6/web/httpserver.py", line 237, in __call__
    return self.app(environ, xstart_response)
  File "/usr/lib/pymodules/python2.6/web/httpserver.py", line 212, in __call__
    return self.app(environ, start_response)
  File "/usr/lib/pymodules/python2.6/web/httpserver.py", line 237, in __call__
    return self.app(environ, xstart_response)
  File "/usr/lib/pymodules/python2.6/web/application.py", line 293, in wsgi
    start_resp(status, headers)
  File "/usr/lib/pymodules/python2.6/web/httpserver.py", line 233, in xstart_response
    out = start_response(status, response_headers, *args)
  File "/usr/lib/pymodules/python2.6/web/httpserver.py", line 234, in xstart_response
    self.log(status, environ)
  File "/usr/lib/pymodules/python2.6/web/httpserver.py", line 251, in log
    print >> outfile, utils.safestr(msg)
AttributeError: 'str' object has no attribute 'write'

It's just when I run application.
When I'm use request emulation, it's okay.

  Traceback (most recent call last):
    File "/Users/bonkabonka/pypy-1.3/site-packages/web/wsgiserver/__init__.py", line 1174, in communicate
      req.respond()
    File "/Users/bonkabonka/pypy-1.3/site-packages/web/wsgiserver/__init__.py", line 544, in respond
      self._respond()
    File "/Users/bonkabonka/pypy-1.3/site-packages/web/wsgiserver/__init__.py", line 556, in _respond
      response = self.wsgi_app(self.environ, self.start_response)
    File "/Users/bonkabonka/pypy-1.3/site-packages/web/httpserver.py", line 201, in __call__
      return self.app(environ, xstart_response)
    File "/Users/bonkabonka/pypy-1.3/site-packages/web/application.py", line 273, in wsgi
      self.load(env)
    File "/Users/bonkabonka/pypy-1.3/site-packages/web/application.py", line 372, in load
      ctx[k] = safeunicode(v)
  AttributeError: ThreadedDict instance has no attribute '__setitem__'

It is not currently possible to nest subapplications as such:

/issue -> issue.app /issue/([0-9,a-f]{8}) -> issue.app /issue/([0-9,a-f]{8})/tests -> tests.app /issue/([0-9,a-f]{8})/tests/([0-9,a-f]{8}) -> tests.app

While this doesn't fit into the model of Web.Py, since there is no mechanism to pass the first issue id to the sub-application, it could be retro-fitted by simply adding a variable to webapi.ctx.

Hi,

I am using web.py as an embedded webserver in my app. Because there is no way to set the port served programatically I have to do this

    import sys; sys.argv[1] = '8080'    #Yuck
    self.app = web.application(xxxx)
    thread.start_new_thread(self.app.run, ())

Otherwise webpy assumes the first command line argument it its port (which it is not as my app has many other command line args)