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Emily Sue
1,769 Pointsintroduction of dictionaries
in the introduction of dictionaries Kenneth's code in the workspace looks like this:
course = {"title": "Python Collections", "teacher": {"first_name": "Kenneth", "last_name": "Love"}
>>> course
{"teacher': {'last_name': 'Love', 'first_name': 'Kenneth'}, 'title': 'Python Collections', 'videos': 22}
I did the exact same thing and my code came out like this:
>>> course = {"title": "Python Collections", "teacher": "Kenneth Love", "videos": 22}
>>> course = {"title": "Python Collections", "teacher":{"first_name": "Kenneth", "last_name": "Love"}
... course
File "<stdin>", line 2 course
^
SyntaxError: invalid syntax
I tried a 2nd time because I saw that it was missing a } and this was my code:
>>> course = {"title": "Python Collections", "teacher": "Kenneth Love", "videos": 22}
>>> course["videos"]
22
>>> course = {"title": "Python Collections", "teacher":{"first_name": "Kenneth", "last_name": "Love"}}
>>> course
{'title': 'Python Collections', 'teacher': {'first_name': 'Kenneth', 'last_name': 'Love'}}
>>>
the code doesn't print out with 'teacher' first but instead it starts with 'title'.
my question is why isn't it working and why does it work for Kenneth when he should have another } at the end of the code instead of one }
[MOD: added ```python formatting -cf]
2 Answers
Chris Freeman
Treehouse Moderator 68,423 PointsThe order of dict key / value pairs printed is dependent on an internal hashing of the key values. This order is not predictable and might even change as more keys are added to the dictionary. The order may even change for different versions of python due to changes in internal dict organization and hashing changes.
You are correct, in that the closing curly bracket should be required. I can't say why the REPL version Kenneth was using allowed the missing curly bracket. Perhaps, his version assumed auto closing of brackets. This is not standard.
Emily Sue
1,769 PointsAlso, in his video "videos": 22 show up at the end of the dictionary but he doesn't call for it at all. how does that come about
Chris Freeman
Treehouse Moderator 68,423 PointsI believe he was only trying to show the different types of objects that can be used for a dict item value, and to show the different types of objects that can be used as a dict key.