How to use the py4web.Field function in py4web

import os
import time
import unittest
import uuid

import mechanize

from py4web import action, DAL, Field, Session, Cache
from py4web.core import bottle, request, error404

os.environ["PY4WEB_APPS_FOLDER"] = os.path.sep.join(
    os.path.normpath(__file__).split(os.path.sep)[:-2]
)

db = DAL("sqlite://storage_%s" % uuid.uuid4(), folder="/tmp/")
db.define_table("thing", Field("name"))
session = Session(secret="my secret")
cache = Cache()

action.app_name = "tests"


@action("index")
@cache.memoize(expiration=1)
@action.uses(db, session)
@action.requires(lambda: True)
def index():
    db.thing.insert(name="test")
    session["number"] = session.get("number", 0) + 1
    return "ok %s %s" % (session["number"], db(db.thing).count())

import os
from py4web import action, request, DAL, Field, Session, Cache, user_in

# define session and cache objects
session = Session(secret="some secret")
cache = Cache(size=1000)

# define database and tables
db = DAL(
    "sqlite://storage.db", folder=os.path.join(os.path.dirname(__file__), "databases")
)
db.define_table("todo", Field("info"))
db.commit()

# example index page using session, template and vue.js
@action("index")  # the function below is exposed as a GET action
@action.uses("index.html")  # we use the template index.html to render it
@action.uses(session)  # action needs a session object (read/write cookies)
def index():
    session["counter"] = session.get("counter", 0) + 1
    session["user"] = {"id": 1}  # store a user in session
    return dict(session=session)


# example of GET/POST/DELETE RESTful APIs


@action("api")  # a GET API function

[Field("name", requires=IS_NOT_EMPTY()), Field("insane", "boolean")],
            form_name="4",
            formstyle=FormStyleBulma,
        ),
        Form(
            [
                Field("name", requires=IS_NOT_EMPTY()),
                Field("color", requires=IS_IN_SET(["red", "blue", "green"])),
            ],
            form_name="5",
            formstyle=FormStyleBulma,
        ),
        Form(
            [
                Field("name", requires=IS_NOT_EMPTY()),
                Field(
                    "favorite_hero", requires=IS_IN_DB(db, "person.id", "person.name")
                ),
            ],
            form_name="6",
            formstyle=FormStyleBulma,
        ),
    ]
    messages = []
    for form in forms:
        if form.accepted:
            messages.append("form %s accepted with: %s " % (form.form_name, form.vars))
        elif form.errors:
            messages.append("form %s has errors: %s " % (form.form_name, form.errors))
    return dict(forms=forms, messages=messages)

form_name="1",
            formstyle=FormStyleBulma,
        ),
        Form(
            [Field("name", requires=IS_NOT_EMPTY())],
            form_name="2",
            keep_values=True,
            formstyle=FormStyleBulma,
        ),
        Form(
            [Field("name", requires=IS_NOT_EMPTY()), Field("age", "integer")],
            form_name="3",
            formstyle=FormStyleBulma,
        ),
        Form(
            [Field("name", requires=IS_NOT_EMPTY()), Field("insane", "boolean")],
            form_name="4",
            formstyle=FormStyleBulma,
        ),
        Form(
            [
                Field("name", requires=IS_NOT_EMPTY()),
                Field("color", requires=IS_IN_SET(["red", "blue", "green"])),
            ],
            form_name="5",
            formstyle=FormStyleBulma,
        ),
        Form(
            [
                Field("name", requires=IS_NOT_EMPTY()),
                Field(
                    "favorite_hero", requires=IS_IN_DB(db, "person.id", "person.name")

formstyle=FormStyleBulma,
        ),
        Form(
            [Field("name", requires=IS_NOT_EMPTY()), Field("age", "integer")],
            form_name="3",
            formstyle=FormStyleBulma,
        ),
        Form(
            [Field("name", requires=IS_NOT_EMPTY()), Field("insane", "boolean")],
            form_name="4",
            formstyle=FormStyleBulma,
        ),
        Form(
            [
                Field("name", requires=IS_NOT_EMPTY()),
                Field("color", requires=IS_IN_SET(["red", "blue", "green"])),
            ],
            form_name="5",
            formstyle=FormStyleBulma,
        ),
        Form(
            [
                Field("name", requires=IS_NOT_EMPTY()),
                Field(
                    "favorite_hero", requires=IS_IN_DB(db, "person.id", "person.name")
                ),
            ],
            form_name="6",
            formstyle=FormStyleBulma,
        ),
    ]
    messages = []

import os
from py4web import DAL, Field
db = DAL('sqlite://test', folder=os.path.join(os.path.dirname(__file__), 'databases'))
db.define_table('thing', Field('name'))

def example_multiple_forms():
    name = Field("name", requires=IS_NOT_EMPTY())
    forms = [
        Form(
            [Field("name", requires=IS_NOT_EMPTY())],
            form_name="1",
            formstyle=FormStyleBulma,
        ),
        Form(
            [Field("name", requires=IS_NOT_EMPTY())],
            form_name="2",
            keep_values=True,
            formstyle=FormStyleBulma,
        ),
        Form(
            [Field("name", requires=IS_NOT_EMPTY()), Field("age", "integer")],
            form_name="3",
            formstyle=FormStyleBulma,

def example_multiple_forms():
    name = Field("name", requires=IS_NOT_EMPTY())
    forms = [
        Form(
            [Field("name", requires=IS_NOT_EMPTY())],
            form_name="1",
            formstyle=FormStyleBulma,
        ),
        Form(
            [Field("name", requires=IS_NOT_EMPTY())],
            form_name="2",
            keep_values=True,
            formstyle=FormStyleBulma,
        ),
        Form(
            [Field("name", requires=IS_NOT_EMPTY()), Field("age", "integer")],
            form_name="3",
            formstyle=FormStyleBulma,
        ),
        Form(
            [Field("name", requires=IS_NOT_EMPTY()), Field("insane", "boolean")],
            form_name="4",
            formstyle=FormStyleBulma,
        ),
        Form(
            [
                Field("name", requires=IS_NOT_EMPTY()),
                Field("color", requires=IS_IN_SET(["red", "blue", "green"])),
            ],
            form_name="5",
            formstyle=FormStyleBulma,
        ),