Install packages from most PPA's (via launchpad) on Debian and other Debian based distros. This won't work for everything as some packages require Ubuntu specific dependencies but it's always worth a try.NOTE: If the PPA you are downloading from has more than one package, this will download the latest one.

ppapt.py

#!/usr/bin/python2.7
#Install packages from most PPA's (via launchpad) on Debian and other Debian based distros.

#Usage:
#./ppapt ppa:user/package

#NOTE: This is written for Python 2.7.5. Feel free to run it on older/newer versions but don't expect stuff to work

#Imports
import os, sys, urllib2

def launchpadParser(url, user, package):
	launchpadHTMLRequest = urllib2.urlopen(url)
	launchpadHTML = launchpadHTMLRequest.read()
	launchpadHTMLRequest.close()
	launchpadHTML = launchpadHTML.split("\n")
	searchTerms = ['href="+sourcepub/']
	searchResults = []

	#Search for link to deb file deatail page in HTML
	for line in launchpadHTML:
		if any(word in line for word in searchTerms):
			searchResults.append(line.strip())

	packageDetailsURL = searchResults[0]
	packageID = packageDetailsURL.split("/")[1]
	packageDetailsURL = "https://launchpad.net/~"+user+"/+archive/"+package+"/+sourcepub/"+packageID+"/+listing-archive-extra"
	launchpadHTMLRequest = urllib2.urlopen(packageDetailsURL)
	launchpadHTML = launchpadHTMLRequest.read()
	launchpadHTMLRequest.close()
	launchpadHTML = launchpadHTML.split("\n")
	searchTerms = ['.deb']
	searchResults = []
	for line in launchpadHTML:
		if any(word in line for word in searchTerms):
			searchResults.append(line.strip())

	debFileURL = searchResults[0]
	debFileURL = debFileURL.split('"')[1]
	return debFileURL

def install(user, package):
	#Find the package on launchpad
	launchpadURL = "https://launchpad.net/~"+user+"/+archive/"+package+"/+packages"
	print("Finding package...")
	debFileURL = launchpadParser(launchpadURL, user, package)

	#Download the package
	print("Downloading package...")
	debFile = urllib2.urlopen(debFileURL)
	fileSys = open('package.deb', 'wb')
	fileSys.write(debFile.read())
	fileSys.close()
	debFile.close()

	#Install the package
	print("Installing package...")
	#If possible use gdebi, but if that isn't installed use dpkg
	if any([os.path.exists(os.path.join(p,"gdebi")) for p in os.environ["PATH"].split(":")]):
		os.system('sudo gdebi package.deb')
	else:
		os.system('sudo dpkg -i package.deb')
	os.remove('package.deb')

ppa = sys.argv[1]

#Decode the PPA
ppa = ppa.split(":")
ppa = ppa[1]
user = ppa.split("/")[0]
package = ppa.split("/")[1]

install(user, package)