python 3 requests try-except failure - python-3.x

Question

I have a program which downloads pages from a site, finds links for pictures in them and downloads those pictures. If I try to run this program on a computer with fast and stable Internet connection - everything works perfectly for days and weeks. But if I try this program on a computer with slow or not stable Internet connection - I have one problem - the "try-except" module doesn't seem to work correctly.
--- this function downloads content - any content (page or picture)
def downl(self,addr,cook,head2,errmess):
global result
try:
result=requests.get(addr, cookies=cook, headers=head2)
except:
print(errmess) # error message
time.sleep(5)
return result
I sent to this function link to the page, then other function looks for picture_link in that page, and then I send to the same function (downl) picture_link. After this I save result of function (downl) as a .jpg file. As I told - on a computer with normal internet connection everything works fine. As a result I have 5, 10 or 5000 pictures on my HDD.
But let me show little example of what happens with bad internet connection. Suppose we have 2 pages and 1 picture in every page.
step 1) downloading 1st page (def downl)
step 2) taking picture_link from it
step 3) downloading picture (def downl)
step 4) saving 1st picture to hdd 1.jpg
step 5) downloading 2nd page (def downl)
step 6) taking picture_link from it
step 7) downloading picture (def downl) and receivind error message (errmess)
step 8) saving 2nd picture to hdd 2.jpg
just for example: 1st picture may be normal jpg with proper content. The second picture will be file with jpg extension but will have 2nd page as it's content (it will be usual html file, saved with wrong extension "jpg")
another words: there was problem with internet during downloadind of the second picture, the program printed an error about it (errmess), but INSTEAD of COUNTLESS retrying (as supposed in my function) it somehow PASSED through the try-except block and returned previous result (2nd page), which was saved as 2nd picture.
Please help! How to make this try-except (or requests) work FOREVER, UNTILL it downloads what it is supposed to download (no matter what mistakes happen with internet connection), and not pass through with previous result.
Thanks very much for youк time and attention.

Answer 1

Then you need a while True loop like this:
def downl(self,addr,cook,head2,errmess):
global result
while(True):
try:
result=requests.get(addr, cookies=cook, headers=head2)
return result
except:
print(errmess) # error message
time.sleep(5)