Python converts a picture in a folder into a PDF

Import OS
Import string
From PIL import Image
From reportlab.lib.pagesizes import A4, landscape
From Reportlab.pdfgen import Canvas
Import Sys

def file_name (file_dir, suffix = ". jpg"):
L=[]
For root, dirs, files in Os.walk (File_dir):
For file in Files:
If Os.path.splitext (file) [1] = = suffix:
L.append (Os.path.join (root, file))
Return L

#f_pdf PDF file path, include filename
#filedir pic file path
#suffix pic file suffix examples:. jpg
def CONP DF (f_pdf, Filedir, suffix):
(w, h) = Landscape (A4)
C = Canvas. Canvas (f_pdf, pagesize = Landscape (A4))
FileList = file_name (filedir, suffix)

for F in fileList:
(Xsize, ysize) = Image.open (f). Size

Ratx = xsize/w
Raty = ysize/h
Ratxy = xsize/(1.0 * ysize)
If RATX > 1 :
Ratx = 0.99
If Raty > 1:
Raty = 0.99

Rat = Ratx

If Ratx < raty:
Rat = Raty
Widthx = w * Rat
Widthy = h * Rat
Widthx = widthy * Ratxy
Posx = (w-widthx)/2
If posx < 0:
Posx = 0
Posy = (h-widthy)/2
If posy < 0:
pos = 0

C.drawimage (F, Posx, Posy, Widthx, widthy)
C.showpage ()
C.sav E ()
print "Image to PDF success!"

if __name__ = = ' __main__ ':
If Len (sys.argv) = = 4:
Conpdf (Sys.argv[1], sys.argv[2], sys.argv[3])
Elif len (sys.argv) = = 3:
#default. jpg
Conpdf (Sys.argv[1], sys.argv[2])
Else
Conpdf ("C:\\users\\pzf\\test.pdf", "C:\\magn", ". jpg")

Python converts a picture in a folder into a PDF