HTML form generator

form.py

#!/usr/bin/python
# coding: utf-8
import json
import inspect

def html_form(func):
    argspec = inspect.getargspec(func)
    default_start = len(argspec[0]) - len(argspec[3])
    index = 0
    args = {}
    for arg in argspec[0]:
        if index >= default_start:
            args[arg] = argspec[3][index - default_start]
        else:
            args[arg] = ""
        index += 1
    form = {}
    try:
        form = json.loads(func.__doc__)
        for arg,default in args.items():
            if not arg in form:
                form[arg] = {"desc": arg, "input": "text", "default": ""}
            form[arg]["default"] = default
    except ValueError:
        print 'Decoding JSON of Docstring failed, then just treat it as title'
        form["title"] = func.__doc__
        for arg,default in args.items():
            form[arg] = {"desc": arg, "input": "text", "default": ""}
            form[arg]["default"] = default

    form["name"] = func.__name__
    print json.dumps(form)
    func.__form__ = form
    return func


@html_form
def func(arg1, arg2 = 4, arg3 = "hhaa"):
    '''
    {
        "title": "title of form",
        "tip": "tip of form",
        "arg1": {
            "desc": "desc_arg1",
            "tip": "tip of arg",
            "input": "select",
            "options": {
                 "1": "activity",
                 "2": "zone",
                 "3": "rank"
            },
            "datalist": {
                 "1": "activity",
                 "2": "zone",
                 "3": "rank"
            }
        }
    }
    '''
    pass


@html_form
def docstr(arg1, arg2 = 4, arg3 = "hhaa"):
    '''test not json docstr'''
    pass

#print getattr(func, "__form__")