NoneType in python

Question

I was trying to get some rating data from Tripadvisor but as i was trying to fetch the data i was getting

\'NoneType\' object is not subscriptable

Answer 1

Not all your <div class="rating"> tags have an <img /> tag, so rate.img is None.

Those divs look like this instead:

<div class="rating">
  <span class="rate">4.5 out of 5, </span>
  <em>2,294 Reviews</em>
  <br/>
  <div class="posted">Last reviewed 25 Sep 2015</div>
</div>

You can either test for this:

if rate.img is not None:
    # ...

or select only images under the div.rating tags with a CSS selector:

for img in soup.select('div.rating img[alt]'):

The selector here picks out <img/> tags with an alt attribute, nested inside a <div class="rating"> tag.

Answer 2

It means that not all divs with a class of rating have images with an alt attribute. You should handle this appropriately - to ignore such cases, just wrap your print (rate.img['alt']) in a try, except block, or check to see if rate.img is None first.

First option:

try:
    print(rate.img['alt'])
except TypeError:
    print('Rating error')

Second option:

for rate in soup.find_all('div',{"class":"rating"}):
    if rate.img is not None:
        print (rate.img['alt'])

The first option follows EAFP (Easier to ask for forgiveness than permission), a common Python coding style, whereas the second follows LBYL (Look before you leap). In this case, I would suggest the second.