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Execute GameFbxExporter Maya with Python

I need to export thousand of files with the GameFbXExporter Plugin from Maya, and I was wondering if there was any way to script those exports, knowing that the parameters are fine in every files. All I need to do is fill the path section and the name of the exported file in FBX, then launching the export itself with the plugin.
I'm kind of lost and doesn't know how to do this. Could someone help me understand how to reach that please?
Thank you

The game exporter is written in MEL, so you can interact with it from Python using the maya.mel module. This will open the dialog, for example:
import maya.mel as mel
mel.eval("gameFbxExporter();")
Unfortunately a quick look at the actual game exporter scripts (which are in your maya install directory in the scripts/others directory -- they all start with the prefix "gameFBX") make it look like the UI is hopelessly entangled with the actual act of exporting; it doesn't seem to expose anything which actually just exports the current file in a batch friendly way.
The operative procedure is called gameExp_FBXExport, defined in "gameFbxExporter.mel." It appears like the actual business of exporting is actually delegated to the regular FBX plugin -- all the other stuff in the game exporter is just managing fbx presets, selecting parts of the scene to export (if you have the scenes set that way) and then calling the fbx plugin. So, you may be able to batch the process using Python by looping over your files and calling FBXExport() from Python. This will export file to FBX:
import maya.cmds as cmds
cmds.FBXExport('-file', 'path/to/file.fbx')
It will just use whatever FBX settings are currently active, so you will need to be confident that the files are correctly set up. You'll be tempted to write it as cmds.FBXExport(f='path/to/file') but that won't work -- the FBX plugin commands don't use regular python syntax.
If your current settings rely on the export-selected functionality you'll need to figure out how to cache the correct selections -- if you're using the "export selections set" functionality you should be able to have your exporter find the set by name and the select it before exporting.
cmds.select("name_of_selection_set")
cmds.FBXExport('-file', 'path/to/file.fbx')
You can use the other FBX plugin commands -- documented here to inspect and manipulate the settings in your files as you go along.
Most professional users don't use the GameExport pipeline precisely because it's very opaque and not batch friendly. In the long run you'll probably want to write a simple system that provides standard settings for different file types and exports the FBXes directly without the GameExporter - while it's a not-trivial project it's going to be easier to maintain and expand than hacking your way around the edges of Autodesk's version which is, frankly, pretty lame.
If you're not already familiar with it http://tech-artists.org/ is a great place to look for pipeline help and advice.

Running python code from a text file into your python program

I Want to save my python code as a text file then make a python launcher that once you log in the program starts executing code from the text file. Is This possible to do and if so can someone please help

The request is a bit obscure but if I got it right you want create a python script that is able to launch other python scripts.
I do not understand the use of this but here's a possible solution, keeping in mind that your "text file" was saved as "yourscript.py":
from subprocess import call
call(["python", "yourscript.py"])
This code will act like if you'd run the saved "yourscript.py" from the command line.

Consider using runpy, e.g.:
import runpy
runpy.run_path("yourscript.py", init_globals={'global_name':some_value})
With optional init_globals parameter you can control global objects within the runtime of the script you are calling.

Python watchdog event not returning entire src_path

I'm using python watchdog to keep track of what files have been changed locally. Because I'm not keeping track of an entire directory but specific files, I'm using watchdog's event.src_path to check if the changed file is the one I'm looking for.
I'm using the FileSystemEventHandler and on_modified, printing the src_path. However, when I edit a file that should have the path /home/user/project/test in gedit, I get two paths, one that looks like /home/user/project/.goutputstream-XXXXXX and one that looks something like this: home/user/project/. I never get the path I'm expecting. I thought there may have been something wrong with watchdog or my own code, but I tested the exact same process in vi, nano, my IDE (PyCharm), Sublime Text, Atom...and they all gave me the src_path I'm expecting.
I'm wondering if there is a workaround for gedit, since gedit is the default text editor for many Linux distributions...Thanks in advance.

From the Watchdog GitHub readme:
Vim does not modify files unless directed to do so. It creates backup files
and then swaps them in to replace the files you are editing on the
disk. This means that if you use Vim to edit your files, the
on-modified events for those files will not be triggered by watchdog.
You may need to configure Vim to appropriately to disable this
feature.
As the quote says your issue is due to how these text editors modify files. Basically rather than directly modifying the file, then create "buffer" files that store the edited data. In your case this file is probably .goutputstream-XXXXXX. When you hit save your original file is deleted and a the buffer file is renamed into its place. So your second path is probably the result of the original file being deleted. Sometimes these files serve as backups instead, but still cause similar issues..
By far the easiest method to solve this issue is to disable the weird way of saving in your chosen text editor. In gedit this is done by unchecking the "Create a backup copy of file before saving" option within preferences. This will stop those backup files from being created and simplify life for watchdog.
Image and preference info shamelessly stolen from this AskUbuntu question
For more information (and specific information for solving vim/vi) see this issue on the watchdog GitHub.
Basically for Vim you need to run these commands to disable the backup/swapping in feature:
:set nobackup
:set nowritebackup
You can add them to your .vimrc to automate the task

A way to "listen" for changes to a file system from Python on Linux?

I want to be able to detect whenever new files are created or existing files are modified or deleted within a given directory tree (or set of trees). The brute force way to do this would be to just rescan the tree looking for changes, but I'm looking for a more "interrupt driven" solution where the file system tells my code what changed when it changes, rather than my code having to "poll" by continuously scanning through thousands of files looking for changes.
A way to do this in Python is preferred, but if I have to write a native module in C that's ok as a last resort.

pyinotify is IMHO the only way to get system changes without scanning the directory.

twisted.internet.inotify! It's much more useful to have an event loop attached than just free-floating inotify. Using twisted also gives you filepath for free, which is a nice library for more easily manipulating file paths in python.

How do I make powerpoint play presentations/load up ppts automatically?

I was wondering how I can make a script load powerpoint file, advance slides automatically and put it on full screen. Is there a way to make windows do that? Can I just load powerpoint.exe and maybe use some sort of API/Pipe to give commands from another script.
To make a case: I'm making a script that automatically scans a folder in windows (using python) and loads up the powerpoint presentations and keeps playing them in order.

One solution for you would be to use the PowerPoint Viewer program instead. PPT Viewer is set to open a PowerPoint file straight away in Presentation mode.
Alternatively, you can use the argument /s to start Powerpoint.
"powerpoint.exe /s <filename>.ppt"
This will be equivalent to telling PowerPoint to straight away open up in Presentation mode.

As previously stated, this is more StackOverflow geared, but this can easily be achieved with Python and AutoHotkey.
On the Python side of things, as a general idea on how to go about this (I'm kind of rusty, beware!):
Find files using os.walk()
Append each to a list, then iterate over the list, opening each one with os.system("powerpoint.exe /s filename"). The next one should not open until the previous closes.
AutoHotkey wise:
Once opened, use #IfWinActive to detect an open Powerpoint window, and send mouse clicks to change slides at a set interval
I don't know what you mean by "order", you'll have to determine that in your Python script. If you want them alphabetical, sort the list alphabetically then iterate. If you want them sorted by creation date, then sort by date and iterate and so on.

Save the file with the extension ".pps". That will make powerpoint open the file in presentation mode.
The presentaion needs to designed to advance slides, else you will have to script that part.

If you want more control over the powerpoint slide, you could write something in VB.Net (or other .Net languages) according to this MS support article.
If you wanted direct control from Python, you could probably use pywin32 or comtypes to invoke directly the same interfaces as described in the MS article. My guess is this is the most powerful solution and would probably provide the smoothest transitions between presentations, but is probably a lot more work than using subprocess to call into PowerPoint.