where are the program that are written in python?

[Terry Reedy]

On 5/21/2010 6:21 AM, Deep_Feelings wrote:
> python is not a new programming language ,it has been there for the
> last .... 15+ years or so ? right ?
>
> however by having a look at this page http://wiki.python.org/moin/Applications
> i could not see many programs written in python (i will be interested
> more in COMMERCIAL programs written in python ). and to be honest ,i

There are two kinds of 'commercial' programs.
1. The vast majority are proprietary programs kept within a company for 
its own use. As long as these work as intended, they are mostly 
invisible to the outside world.
2. Programs sold to anyone who wants them.

Python trades programmer speed for execution speed. If a successful 
Python program is going to be run millions of times, it makes economic 
sense to convert time-hogging parts to (for instance) C.  In fact, this 
is a consideration in deciding what functions should be builtin and 
which stdlib modules are written or rewritten in C.

Programs being sold tend to be compared to competitors on speed with 
perhaps more weight than they rationally should. Speed is easier to 
measure than, for instance, lack of bugs.

Python programs can be and sometimes are distributed as .exe files. The 
users of such neither know nor care that some of the source is Python.

> tried some of the programs in that list and all the programs that i
> tried either dead projects or so buggy !
>
> 1- where are the programs that is written in python ?

Mostly kept private. For instance, GvR, Python's inventor, spent part of 
his first year at Google writing a neat-looking programmer console 
program in Python (Mondrian) designed to improve the productivity of 
Google programmers. As far as I know, Google has not released it.

> please don't mention programs where python was used as a glue ,those
> programs are not actually written in python.

A C program glues together micro-coded functions. Even a 'pure' CPython 
program glues together C-coded functions. Some are in builtins, some are 
imported from the stdlib, and some can be imported from 3rd party 
packages. The extensibility of CPython is part of its design.

Terry Jan Reedy