pythonWatermarker

from pdfrw import PdfReader, PdfWriter, PageMerge
import StringIO
import os

output = PdfWriter()
marca = "_lf"

for i in os.listdir(os.getcwd()):
	if i.endswith(".pdf"):
		if (not marca in i) and (not '_backup' in i):
			#print i

			ipdf = PdfReader(i)
			PdfWriter().write('.' + i[:-4] + '_backup' + '.pdf', ipdf)
			wpdf = PdfReader("logo.pdf")
			wmark = PageMerge().add(wpdf.pages[0])[0]

			for page in ipdf.pages:
				PageMerge(page).add(wmark).render()

			# finally, write "output" to document-output.pdf
			PdfWriter().write(i[:-4] + marca + '.pdf', ipdf)
			file_path = os.path.join(os.getcwd(), i)
			try:
				if os.path.isfile(file_path):
					os.unlink(file_path)
					#elif os.path.isdir(file_path): shutil.rmtree(file_path)
			except Exception, e:
				print e