python

After the fine and long article about escaping from Matthias here some examples for special characters in a simple web application. This article should be only an inspiration, I will describe some code samples with python/javascript and explain why [<"@%'&_\?/:;,>কী €] is the ultimate input to test input in web applications.

The demo application offers a simple form with name and message field for an one-line guest book.Read more

After running the IP-geolocation application in the google app engine some weeks I gained some experience while fetching data and saving into the storage. Looking at the logs with the dash board some interesting errors appeared and that's why I write this article as a notepad for me (or for other python developers). If possible python snipplets will solve the problem cases of errors like "ApplicationError: 5" or "CapabilityDisabledError".Read more

Finding an IP address in text or string with python is a simpler task than in java. Only the regex is not shorter than in the java regex example!

First an example with python: build a RegExp-Object for faster matching and than loop over the result iterator.

A regex like /\d+\.\d+\.\d+\.\d+/ wont work, because there match "999.999.111.000" too. But for the usage in python - that is it! Using a regular expression is more native in python than in java. Or in javascript or in perl or asp.net... Read more

In this part I will introduce the python implementation of the ip to geolocation script. It's more object oriented and hopefully better to read. In the first part of this article I willdescribe the solution to read http resources and parse the content. The second part is the same like the php version. As conclusion I will compare the results of all five APIs with the data from the cache.Read more

• the tutorial how to use ip to geolocation provider api
• the free usage ip to geolocation aggregator script
• the php stand alone implementation
• the python google appengine implementation

To work with lists many c/c++ programmer use a simple for-loop. I will try to explain how this can be made a little bit easier. For that I use the self-explaining script language python.

Here is a simple example to filter all odd integers from a list in simple python 2.x syntax.