Modifying a scraped url and changing its extension - python-3.x

Question

I am new to programming and trying to download images and PDFs from a website. In the source code, the items I need are in option tags with partial urls. The site lists these items in a drop-down menu and they display in an iframe, but each item can be opened on its own page using its full url.
So far, my code finds the options, appends the partial url to the page's base address to create the full url for each option, and removes the final " / " from the .tif and .TIF urls and adds a ".pdf".
However, for the .tif and .TIF urls, I need to change "convert" to "pdf" to open them in a new page. Is there a way to do this to only the .tif.pdf and .TIF.pdf urls while leaving the others unchanged?
from urllib.request import urlopen as uReq
from bs4 import BeautifulSoup as soup
import os
my_url = 'http://example.com'
uClient = uReq(my_url)
page_html = uClient.read()
uClient.close()
page_soup = soup(page_html, "html.parser")
options = page_soup.findAll("select",{"id":"images"})[0].findAll("option")
values = [o.get("value") for o in options]
split_values = [i.split("|", 1)[0] for i in values]
# The option value is split to separate the url from its label
# <option value="/convert/ASRIMG/new/hop.TIF/|New Form"></option>
new_val = []
for val in split_values:
ext = os.path.splitext(val.rstrip('/'))[-1]
new_ext = ext
if ext.lower() == '.tif':
new_ext += '.pdf'
new_val.append(val.rstrip('/').replace(ext, new_ext))
for i in range (len(new_val)):
image_urls = ('http://example.com' + new_val[i])
My current results:
print (new_val)
/ASRIMG/good.jpg
/ASRIMG/foo/bar1.jpg
/ASRIMG/foo/bar2.jpg
/ASRIMG/foo/bar3.jpg
/convert/ASRIMG/new/hop.TIF.pdf
/convert/REG/green1.tif.pdf
/convert/REG//green2.tif.pdf
/convert/SHIP/green3.tif.pdf
/convert/SHIP/green4.tif.pdf
/convert/SHIP/green5.tif.pdf
/SKETCHIMG/001.png
/SKETCH/002.JPG
print (image_urls)
http://example.com/ASRIMG/good.jpg
http://example.com/ASRIMG/foo/bar1.jpg
http://example.com/ASRIMG/foo/bar2.jpg
http://example.com/ASRIMG/foo/bar3.jpg
http://example.com/convert/ASRIMG/new/hop.TIF.pdf
http://example.com/convert/REG/green1.tif.pdf
http://example.com/convert/REG//green2.tif.pdf
http://example.com/convert/SHIP/green3.tif.pdf
http://example.com/convert/SHIP/green4.tif.pdf
http://example.com/convert/SHIP/green5.tif.pdf
http://example.com/SKETCHIMG/001.png
http://example.com/SKETCH/002.JPG
What I need:
http://example.com/ASRIMG/good.jpg
http://example.com/ASRIMG/foo/bar1.jpg
http://example.com/ASRIMG/foo/bar2.jpg
http://example.com/ASRIMG/foo/bar3.jpg
http://example.com/pdf/ASRIMG/new/hop.TIF.pdf
http://example.com/pdf/REG/green1.tif.pdf
http://example.com/pdf/REG//green2.tif.pdf
http://example.com/pdf/SHIP/green3.tif.pdf
http://example.com/pdf/SHIP/green4.tif.pdf
http://example.com/pdf/SHIP/green5.tif.pdf
http://example.com/SKETCHIMG/001.png
http://example.com/SKETCH/002.JPG

Answer 1

After this step:
split_values = [i.split("|", 1)[0] for i in values]
This code handles both upper and lower tif:
In [48]: import os
In [49]: split_values = ['/ASRIMG/good.jpg', '/convert/ASRIMG/new/hop.TIF/', 'SK
...: ETCHIMG/001.png']
In [50]: new_val = []
In [51]: for val in split_values:
...: ext = os.path.splitext(val.rstrip('/'))[-1]
...: new_ext = ext
...: if ext.lower() == '.tif':
...: new_ext += '.pdf'
...: new_val.append(val.rstrip('/').replace(ext, new_ext))
...:
...:
This strips .tif/ from each value from split_values list from the right side and then adds .tif.pdf in the end