How to register your Free domain.co.cc with Google apps

After countless frustration with Plesk about how to get my domain to work.
I decided to give 'free' a try
And Co.cc is wonderful option . it just works.
This is how i did it

Go to
http://www.co.cc
Search for your domain. Register the CNAME record as :

http://www.co.cc/google_apps/google_apps.php

check it with Google apps.
You're done.


With Plesk. I also found a very helpful tutorial but it doesn't work for me yet
http://branchwire.com/support/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=1#

Simple Useful CSS tutorial

After wasting time with other website i found it

http://www.webcredible.co.uk/user-friendly-resources/css/css-forms.shtml

Dealing with float comparing in Python

Let's start.
a = 0.7
b = 0.3
a - b = 0.4
if a - b == 0.4:
print ' a - b == 0.4'
else:
print 'a - b != 0.4'

Result a - b != 0.4

OH WHAT'S...
Solution:
if str(a -b) == str(0.4):
print 'a - b == 0.4'


Read Python Doc for more information

Query with variable and AND

It is
query =db.GqlQuery("SELECT * FROM table WHERE 1st_attribute =:variable AND 2nd_attribute ='value' ", variable = data)

invalid literal for int with base 10

/?p=33
I get quite some traffic for the term “invalid literal for int with base 10″. I guess a lot people fumbling around with Python or Django are getting this error message once in a while. This happens when you try to cast a string into an integer and this string does not really contain a “digit”:
Python 2.6 (r26:66721, Oct 2 2008, 11:35:03) [MSC v.1500 32 bit (Intel)] on win32
Type “help”, “copyright”, “credits” or “license” for more information.
>>> string = “TestString”
>>>number = int(string)
Traceback (most recent call last):
File “”, line 1, in
ValueError: invalid literal for int() with base 10: ‘TestString’
>>>string = “1″
>>>number = int(string)
>>>number
1
If you work with the Django framework and get this error while trying to request a web page I would check the parameters. Since every parameter that is getting passed in a request is a string you probably cast them into integers somewhere in your source code. It can be a category id or similar. Now when that category id for whatever reason is empty or does not contain a string that can be cast into an integer, you will get the “invalid literal for int with base 10″ error message.
To avoid this error you should check if the string contains a digit:
Python 2.6 (r26:66721, Oct 2 2008, 11:35:03) [MSC v.1500 32 bit (Intel)] on win32
Type “help”, “copyright”, “credits” or “license” for more information.
>>> string = “1″
>>> if string.isdigit():
… number = int(string)
… else:
… print “The variable String contains no digit”
…
>>> number
1
str.isdigit()
Return true if all characters in the string are digits and there is at least one character, false otherwise.
For 8-bit strings, this method is locale-dependent.
More on String operations can be found in the Python documentation.

Get

keyname = firstmodel.key()
query = FirstModel.get(keyname)
print query

Count Instance method of Query Class

from google.appengine.ext import db
from google.appengine.api import users
 
class FirstModel(db.Model):
    prop = db.IntegerProperty()

class SecondModel(db.Model):
    prop2 = db.IntegerProperty()
    reference = db.ReferenceProperty(FirstModel, collection_name = "relation")



//Input data to datastore
firstmodel = FirstModel(prop = 06)
firstmodel.put()
secondmodel = SecondModel(prop2 = 1, reference = firstmodel)
secondmodel.put()
secondmodel = SecondModel(prop2 = 2, reference = firstmodel)
secondmodel.put()



//Count
query = firstmodel.relation
query_count = query.count()
print query_count

OR
query = FirstModel.all()
query_count = query.count()
print query_count

Result:
2

Google app engine simple query

from google.appengine.ext import db
from google.appengine.api import users

class FirstModel(db.Model):
prop = db.IntegerProperty()

class SecondModel(db.Model):
prop2 = db.IntegerProperty()
reference = db.ReferenceProperty(FirstModel, collection_name = "relation")


// Put data to datastore
firstmodel = FirstModel(prop = 06)
firstmodel.put()
secondmodel = SecondModel(prop2 = 1, reference = firstmodel)
secondmodel.put()
secondmodel = SecondModel(prop2 = 2, reference = firstmodel)
secondmodel.put()


Get all entity by using collection_name

query = firstmodel.relation
query = query.fetch(30)
print query



The Result
2 entity are displayed.
[<__main__.SecondModel object at 0x020736B0>, <__main__.SecondModel object at 0x02073790>]

TCAP

Prevent to create an Instance of a Class

I think it's cool


class ClassName:
def __init__( self ):
if self.__class__ == ClassName:
raise NotImplementedError, "Cannot create object of this class"

Datastore

Tkinter_Checkbutton

from Tkinter import *

master = Tk()

var = IntVar()

def value() :
print var.get()

c = Checkbutton(master, text="Expand", variable=var, command = value)
c.pack()


mainloop()


result
***************
0
1
0
1

python GUI TKINTER

Very good TKinter tutorial
http://www.ferg.org/thinking_in_tkinter/

SQlite foreign key

FOREIGN KEY constraints is not Supported
http://www.sqlite.org/omitted.html


The 'walk around' method : Use trigger
http://www.sqlite.org/cvstrac/fileview?f=sqlite/tool/genfkey.README

http://www.sqlite.org/cvstrac/wiki?p=ForeignKeyTriggers

Create foreign key with SQlite

http://www.sqlite.org/cvstrac/fileview?f=sqlite/tool/genfkey.README

How to set more than one primary key in Sqlite

Sqlite could have more than one PRIMARY KEY . Do it as the following :



CREATE TABLE ex1(
a TEXT,
b VARCHAR(10),
c FLOAT,
PRIMARY KEY(b,a)
);