Free python database software for linux

python-gastables includes Python modules for compressible gas flow calculations.

The project includes Python modules for isentropic relations, normal shock relations, oblique shock relations, Fanno flow, isothermal flow, Rayleigh flow, and Prandtl Meyer functions.

Python milter module provides a python interface to Sendmails libmilter that exploits all its features. Milters can run on the same machine as sendmail, or another machine.
The milter can even run with a different operating system or processor than sendmail. Sendmail talks to the milter via a local or internet socket, and keeps the milter informed of events as it processes a mail connection.
At any point, the milter can cut the conversation short by telling sendmail to ACCEPT, REJECT, or DISCARD the message. After receiving a complete message from sendmail, the milter can again REJECT or DISCARD it, but it can also ACCEPT it with changes to the headers or body.
Enhancements:
- The spf module has been moved to the pyspf package.
- This will cause some confusion when upgrading, since 0.8.6 still has the module and will conflict with pyspf, whereas 0.8.7 does not have spf by itself, and will stop doing SPF if you dont install pyspf.

Python is an interpreted, interactive, object-oriented programming language. Python is often compared to Perl, Tcl, Scheme or Java.

Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems (X11, Motif, Tk, Mac, MFC). New built-in modules are easily written in C or C++. Python is also usable as an extension language for applications that need a programmable interface.

The Python implementation is portable: it runs on many brands of UNIX, on Windows, OS/2, Mac, Amiga, and many other platforms. If your favorite system isnt listed here, it may still be supported, if theres a C compiler for it.

The Python implementation is copyrighted but freely usable and distributable, even for commercial use.

Python is an interpreted, object-oriented, high-level programming language with dynamic semantics. Its high-level built in data structures, combined with dynamic typing and dynamic binding, make it very attractive for Rapid Application Development, as well as for use as a scripting or glue language to connect existing components together.

Pythons simple, easy to learn syntax emphasizes readability and therefore reduces the cost of program maintenance. Python supports modules and packages, which encourages program modularity and code reuse. The Python interpreter and the extensive standard library are available in source or binary form without charge for all major platforms, and can be freely distributed.

Often, programmers fall in love with Python because of the increased productivity it provides. Since there is no compilation step, the edit-test-debug cycle is incredibly fast. Debugging Python programs is easy: a bug or bad input will never cause a segmentation fault. Instead, when the interpreter discovers an error, it raises an exception.

When the program doesnt catch the exception, the interpreter prints a stack trace. A source level debugger allows inspection of local and global variables, evaluation of arbitrary expressions, setting breakpoints, stepping through the code a line at a time, and so on.

The debugger is written in Python itself, testifying to Pythons introspective power. On the other hand, often the quickest way to debug a program is to add a few print statements to the source: the fast edit-test-debug cycle makes this simple approach very effective.

PyMM is an MP3 Manager written in Python. With it you can easily create playlists, edit ID3 tags and search your collection.
I used to use the windows program MP3 Manager to manage my MP3s. I have since migrated my MP3 collection to Unix, and I therefore needed something similar on that platform. The project also gave me an opportunity to get aquainted with wxPython, which I must say is a quite suberb windowing toolkit.
You can use the program to manage your collection, create playlists, control the XMMS player, edit ID3 tags and so forth.
You can install the program in two ways:
1. run "python setup.py install". This requires write access to the python installation tree. It will install a startup script in the python bin directory. Then just type "pymm" to start the program.
This requires Python 2.0/1.6 or that you have Distutils installed.
2. Just put this directory somewhere and start the program with "python pymm.py". I made a link to the pymm.py script in a bin directory (i.e something like "ln -s /pymm.py /usr/local/bin/pymm").
Enhancements:
- pymm.py (Timer.Notify): Added total time of track to statusbar.
- xmms.py (Xmms): Added get_playlist_time(pos).

Python lambda calculus module project is a simple but full-featured module for exploring lambda calculus.
It understands the different types of lambda expressions, can extract lists of variables (both free and bound) and subterms, and can simplify complicated expressions by means of application.
Notations for lambda expressions vary slightly, so it is instructive to detail the precise notation used by this module. A variable is expressed with a string of alphanumeric characters, e.g., x or abc1.
Enhancements:
- Initial release.

Python XHTML is a simple Python module for the generation of valid XHTML.

ToDo:

* include tests for all methods in xhtml_test.py
* ensure that all text that is added to the document is xml safe
* include methods for added w3.org validation link buttons
* complete support for XHTML 1.1 specification

pythondr project is a simple python library for parsing the TV-channel info at http://dr.dk.

Python Call Graph (pycallgraph) is a Python library that creates call graphs for Python programs

pycallgraph is quite new. It seems to work well and I will most likely improve it in the near future!