[Python] Why wont the NASA pictures display?

The pictures are not displaying. The code executes just fine. I took out the api key.

def gimmePictures(num):
for n in range(0,num):
now = datetime.datetime.now()
day4Pictures= now - datetime.timedelta(days = n)
data = {'api_key':'',
'date':day4Pictures.date()}
print(data)
# using the paramas argument in our request
result = requests.get('https://api.nasa.gov/planetary/apod',params=data)
# create a dictionary for yesterday's picture
dict_day = result.json()
print(dict_day['date'])
Image(dict_day['url'])
gimmePictures(10)

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