For example, I have the dictionary {Sam: 93, bob: 23}

And I want to know which people have got 93 % in the course.

How can I do this?

QUESTION:

There are two ways to get an item from a dict. Referencing the item with "dict[key]" or calling "dict.get(key)".

If the item doesn't exist, dict[key] raises KeyError, whereas dict.get(key) return None.

Which of these is more pythonic?

try:
    value = dict\[key\]
except KeyError as ke:
    \# Do something else

Or

value = dict.get(key)

if value == None:
   \# Do the thing
else:
   \# Do something else

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UNNECESSARY CONTEXT FOR COMPLETIONISTS:

I am writing a program that imports objects and maps their relationships as a tree.

Part of the processing involves a dict that tracks partial relationships between entities. If I have already processed the item's parent, then it's easy for me to look up the parent's entire path to the root of the tree in a dict based on the parent's identifier. Then I just create a new dict entry which is "parent's path + child". Usually, this works, but sometimes the object's parent hasn't been processed yet. I do some special processing when I detect that the parent's path hasn't been discovered.