Change Default Fade In/Out in OpenShot

#!/usr/bin/python
#/home/<username>/bin/fadeinouthack.py

# Released under a GPLv3 Licence by Clockwork PC 2012
# www.clockworkpc.com.au

# You are entitled to the following four freedoms:
# Freedom 0: To run this program for any purpose
# Freedom 1: To study how this program works and change it to make it do what you wish
# Freedom 2: To redistribute copies so you can help your neighbour
# Freedom 3: To distribute copies of your modified version to others

import os
import fileinput

#Location of MainGTK.py, which is where the Fade In and Fade Out defaults are set
mainGTKFile = os.getenv("HOME") + "/usr/share/pyshared/openshot/windows/MainGTK.py"

#Location of dummy MainGTK.py
mainGTKDummyFile = os.getenv("HOME") + "/bin/MainGTK.py"
mainGTKDummyFileTemp = os.getenv("HOME") + "/bin/MainGTK_temp.txt"

#Make a backup of MainGTK (of course!)
os.system("cp " + mainGTKFile + " " + mainGTKDummyFileTemp)

#These are the default fade speeds in OpenShot.  I haven't work out how to get the default speeds from MainGTK, but maybe someone can work that out.
oldFadeFast = "2.0"
oldFadeSlow = "4.0"

#Get the new fade speeds and make sure they have one decimal place.  Because these numbers are being used as strings rather than data I've gone with the clumsy concatenation rather than taking integer input and using %1.f to supply the decimal place.
newFadeFast = raw_input("How many seconds do you want the Fast Fade In/Out to be? ") + ".0"
newFadeSlow = raw_input("How many seconds do you want the Slow Fade In/Out to be? ") + ".0"

#Just to be on the safe side, not necessary.
print "newFadeFast is... " + newFadeFast
print "newFadeSlow is... " + newFadeSlow

#Audio Fade Fast Old
audioFadeInFastOld = "self.selected_clip.audio_fade_in_amount = " + oldFadeFast
audioFadeOutFastOld = "self.selected_clip.audio_fade_out_amount = " + oldFadeFast

#Audio Fade Slow Old
audioFadeInSlowOld = "self.selected_clip.audio_fade_in_amount = " + oldFadeSlow
audioFadeOutSlowOld = "self.selected_clip.audio_fade_out_amount = " + oldFadeSlow

#Video Fade Fast Old
videoFadeInFastOld = "self.selected_clip.video_fade_in_amount = " + oldFadeFast
videoFadeOutFastOld = "self.selected_clip.video_fade_out_amount = " + oldFadeFast

#Video Fade Slow Old
videoFadeInSlowOld = "self.selected_clip.video_fade_in_amount = " + oldFadeSlow
videoFadeOutSlowOld = "self.selected_clip.video_fade_out_amount = " + oldFadeSlow

#Audio Fade Fast New
audioFadeInFastNew = "self.selected_clip.audio_fade_in_amount = " + newFadeFast
audioFadeOutFastNew = "self.selected_clip.audio_fade_out_amount = " + newFadeFast

print "audioFadeInFastNew: " + audioFadeInFastNew
print "audioFadeOutFastNew: " + audioFadeOutFastNew

#Audio Fade Slow New
audioFadeInSlowNew = "self.selected_clip.audio_fade_in_amount = " + newFadeSlow
audioFadeOutSlowNew = "self.selected_clip.audio_fade_out_amount = " + newFadeSlow

print "audioFadeInSlowNew: " + audioFadeInSlowNew
print "audioFadeOutSlowNew: " + audioFadeOutSlowNew

#Video Fade Fast New
videoFadeInFastNew = "self.selected_clip.video_fade_in_amount = " + newFadeFast
videoFadeOutFastNew = "self.selected_clip.video_fade_out_amount = " + newFadeFast

print "videoFadeInFastNew: " + videoFadeInFastNew
print "videoFadeOutFastNew: " + videoFadeOutFastNew

#Video Fade Slow New
videoFadeInSlowNew = "self.selected_clip.video_fade_in_amount = " + newFadeSlow
videoFadeOutSlowNew = "self.selected_clip.video_fade_out_amount = " + newFadeSlow

print "videoFadeInSlowNew: " + videoFadeInSlowNew
print "videoFadeOutSlowNew: " + videoFadeOutSlowNew

# Replace Audio Fast Fade In
for line in fileinput.FileInput(mainGTKDummyFile, inplace=1):
    string_found = False
    if (not string_found) and (audioFadeInFastOld in line):
            line=line.replace(audioFadeInFastOld,audioFadeInFastNew)
            string_found = True
            print line,
    else:
            print line,

# Replace Audio Fast Fade Out
for line in fileinput.FileInput(mainGTKFile, inplace=1):
    string_found = False
    if (not string_found) and (audioFadeOutFastOld in line):
            line=line.replace(audioFadeOutFastOld,audioFadeOutFastNew)
            string_found = True
            print line,
    else:
            print line,

# Replace Video Fast Fade In
for line in fileinput.FileInput(mainGTKFile, inplace=1):
    string_found = False
    if (not string_found) and (videoFadeInFastOld in line):
            line=line.replace(videoFadeInFastOld,videoFadeInFastNew)
            string_found = True
            print line,
    else:
            print line,

# Replace Video Fast Fade Out
for line in fileinput.FileInput(mainGTKFile, inplace=1):
    string_found = False
    if (not string_found) and (videoFadeOutFastOld in line):
            line=line.replace(videoFadeOutFastOld,videoFadeOutFastNew)
            string_found = True
            print line,
    else:
            print line,

# Replace Audio Slow Fade In
for line in fileinput.FileInput(mainGTKFile, inplace=1):
    string_found = False
    if (not string_found) and (audioFadeInSlowOld in line):
            line=line.replace(audioFadeInSlowOld,audioFadeInSlowNew)
            string_found = True
            print line,
    else:
            print line,

# Replace Audio Slow Fade Out
for line in fileinput.FileInput(mainGTKFile, inplace=1):
    string_found = False
    if (not string_found) and (audioFadeOutSlowOld in line):
            line=line.replace(audioFadeOutSlowOld,audioFadeOutSlowNew)
            string_found = True
            print line,
    else:
            print line,

# Replace Video Slow Fade In
for line in fileinput.FileInput(mainGTKFile, inplace=1):
    string_found = False
    if (not string_found) and (videoFadeInSlowOld in line):
            line=line.replace(videoFadeInSlowOld,videoFadeInSlowNew)
            string_found = True
            print line,
    else:
            print line,

# Replace Video Slow Fade Out
for line in fileinput.FileInput(mainGTKFile, inplace=1):
    string_found = False
    if (not string_found) and (videoFadeOutSlowOld in line):
            line=line.replace(videoFadeOutSlowOld,videoFadeOutSlowNew)
            string_found = True
            print line,
    else:
            print line,