Question: PYTHON PYTHON PYTHON PYTHON PYTHON PYTHON PYTHON PYTHON PYTHON Question 1: Dictionaries contain key-value pairs. Values are like a list's indexes. True False Question 2:
PYTHON PYTHON PYTHON PYTHON PYTHON PYTHON PYTHON PYTHON PYTHON
Question 1:
Dictionaries contain key-value pairs. Values are like a list's indexes.
| True | |
| False |
Question 2:
Dictionaries do not consider the key-value pairs to be in any certain order.
| True | |
| False |
Question 3:
What is the syntax for writing a dictionary in Python?
| [ key : value ] | |
| ( key, value ) | |
| { value : key } | |
| { key : value } |
Question 4:
When it comes to being able to add, remove, or change values, dictionaries are _____
| unchangeable | |
| molten | |
| mutable | |
| immutable |
Question 5:
Given this dictionary: user{'name' : 'Bob', 'username' : 'bob42' } What happens when you try to access the dictionary like this: user['age']
| A KeyError message is displayed | |
| The user is prompted to enter Bob's age | |
| Bob's age is displayed | |
| A default value is set because there is no 'age' key in the dictionary |
Question 6:
What method provides a way to avoid a KeyError message by returning a result when attempting to access keys that may not be present in a dictionary?
| items() | |
| values() | |
| has() | |
| get() |
Question 7:
What method provides a way to set a default key-value pair when wanting to access a key that may not be present in a dictionary?
| items() | |
| default() | |
| has() | |
| setdefault() |
Question 8:
What expression would give the same result as the following? if 'age' not in user: user['age'] = 'unknown'
| user.setdefault('age', 'unknown') | |
| user.add('age', 'unknown') | |
| if get('age') is False set to 'unknown' | |
| user = { 'age' : 'unknown' } |
Question 9:
What module and function can be used to "pretty print" dictionary values?
| pprint.print() | |
| pprint.pprint() | |
| pretty.print() | |
| print.pprint() |
Question 10:
What type of data does the method items() return when called on a dictionary?
| A list of the key and value | |
| A list of the only the values | |
| A list like dict_keys with the keys | |
| A collection of tuples consisting of key and value pairs |
Question 11:
Given this dictionary: user{'name' : 'Bob', 'username' : 'bob42' } What structure will allow us to loop through and access both the keys and values in the dictionary?
| for v in user.keys() | |
| for k, v in user.items(): | |
| for 'name' in user: | |
| if v in user: |
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