Shell callable from Python

First off I have very bad C/C++ abilities so take it easy and please comment any code you post.

I'm trying to create a BASH free version of Python that has all the capablities of BASH. So all I need is a C extension module that has some file execution and manipulation abilities. I would appreciate it if anyone could give me a list of features a shell scripting launguage needs or if someone would write some functions that did things like execute files or read/write files. However, if someone could give me some urls of websites that have source code examples or shell programming tutorial that would be even better.

Thanks.

What exactly is a "BASH free version of Python" ? Python is... BASH free? The two are unrelated.

If you're trying to write a scripting language, it's a little more involved that "a C extension module that has some file execution and manipulation abilities." You'll need to define the grammar of your language, write a parser, etc. Let alone write whatever functionality it might come with.

I should've stated the original question better, I am not trying to write a scripting laungauge, I'm trying to write a C extension module for Python. The question is how to write functions that execute files, read/write files, list all the files in a directory, check if the file/folder exists, etc. (bonus to anybody who can think up a full list) The reason I need this is because Python relies on BASH heavily to do a lot of file processing. (please don't ask why I don't want BASH, just take my word for it)

Thanks for the quick response.

Well there pretty much _are_ functions that execute, read and write files, etc... Since that kind of a thing depends on your system. they're supplied by your operating system, either as part of the standard library, or extensions thereof.

Under linux, you execute files with exec(). You read and write files on any system with fopen, fgetc, fputc, fclose, etc... (all part of the standard library). And the list goes on. If you learn C, you'll learn how to do what you're talking about.

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The reason I need this is because Python relies on BASH heavily to do a lot of file processing.

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I am almost certain that Python and Bash are in no way tied together - I use Python on Windows, which has no Bash. (None that Python knows about.)
Quickly glacing at the Python source code, it would appear it does the IO directly. What makes you think it uses Bash?

It only uses BASH on Linux, it uses the windows shell on windows. The os module is the part that uses BASH.