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heebers
Python Development Techdegree Student 1,835 PointsQuestion Regarding what exactly is being returned from course.items()
Hello,
from W3 Documentation (and also the lecture from Ashley) states that the items method from a dictionary: "Returns a list containing a tuple for each key value pair"
course = {"teacher":'Ashley', "title":'Introducing Dictionaries', "level":'Beginner'}
result = course.items()
print(result)
print(type(result)) #This returns 'dict_items', shouldn't it the return type be list
#print(result[0]) produces TypeError: 'dict_items' object is not subscriptable
Since it is a list, why is the type not a list, but instead 'dict_items' Also if it is a list shouldn't the individual key:value pairs(stored as a single tuple) be accessible by index values in the list, such as course[0] would return ("teacher":"Ashley")
However, when I try to do that i receive print(result[0]) produces TypeError: 'dict_items' object is not subscriptable.
2 Answers
Chris Freeman
Treehouse Moderator 68,457 PointsHey heebers, great question!
The result is a Dict view object. They are dynamic views into a dictionary. If the courses were to change, then view object result would dynamically see the change!!
To get a regular list of (key, value) tuples, convert to a list using list(result).
Post back if you have more questions. Good luck!!
Leah Kelly
4,141 PointsThe key and the value of the key.