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In Python, a dictionary stores data values in key-value pairs. If you use the append() method to add new values to a dictionary, you will raise the AttributeError: 'dict' object has no attribute append. The append() method belongs to the list data type and not the...

To define a dictionary in Python, you need to use curly brackets with the keys and values separated by colons. If you use commas between keys and values, you create a set. Then when you try to use the dictionary method items on the set, you will raise the...

To define an empty set in Python 3, you need to use the built-in set() function. If instead, you use the curly brackets {}, you are creating an empty dictionary. Then when you try to use the set method add on the empty dictionary, you will raise the AttributeError:...

We use dictionaries to store data values in key-value pairs in Python. The dictionary method iteritems() returns an iterator of the dictionary's list as key-value tuple pairs. As of Python major version 3, the items() method replaced iteritems(). If you try to call...

We use dictionaries to store data values in key:value pairs in Python. The dictionary method has_key() returns True if a specified key is present in the dictionary. Otherwise, it returns False. As of Python major version 3, has_key was removed from the dictionary...

The built-in Python function round() returns a rounded version of a specified floating-point number to a specified number of decimal places. The round() function does not belong to the float data type. If you try to call the round() method on a floating-point number,...

In Python, the list data structure stores elements in sequential order. We can use the dictionary items() method to return a view object containing the key-value pairs of a dictionary. However, we cannot apply the items() method to a list. If you try to use...

In Python, the list data structure stores elements in sequential order. We can use the dictionary values() method to return a view object containing the dictionary's values as a list. However, we cannot apply the values() method to a list. If you try to use...

In Python, the list data structure stores elements in sequential order. We can call the dictionary get() method to return the item's value with the specified key. However, we cannot call the get() method on a list. If you try to call...