How to retrieve images from a url in a pandas dataframe and store them as PIL object in a new column

Question

I'm trying to store as a PIL object in a new column of a dataframe pictures that are located in a column of the same dataframe in the form of URL's.

I've tried the following code:

import pandas as pd
from PIL import Image
import requests
from io import BytesIO

pictures = [None] * 2

df = pd.DataFrame({'project_id':["1", "2"], 
                    'image_url':['http://www.personal.psu.edu/dqc5255/gl-29.jpg',
                                'https://www.iprotego.com/wp-content/uploads/google.jpg']})

df.insert(2, "pictures", pictures, True)

for i in range(2):
    r = requests.get(df.iloc[i,1]) 
    df.iloc[i,2] = Image.open(BytesIO(r.content))

df

I expected to get a dataframe with this structure but including both training examples:

    project_id                  image_url                                  pictures
0       1    http://www.personal.psu.edu/dqc5255/gl-29.jpg <PIL.JpegImagePlugin.JpegImageFile image mode=RGB size=400x300 at 0x116EF9AC8>

But instead got the following error:

OSError: cannot identify image file <_io.BytesIO object at 0x116ec2f10>
```