Dictionary Methods
Example:
Create a dictionary with 3 keys, all with the value 0:
x = (‘key1’, ‘key2’, ‘key3’)
y = 0
thisdict = dict.fromkeys(x, y)
print(thisdict)
Output:
[‘key1’: 0, ‘key2’: 0, ‘key3’: 0]
Python has a set of built-in methods that you can use on dictionaries.
| Method | Syntax | Description |
|---|---|---|
| clear() | dictionary.clear() | Removes all the elements from the dictionary |
| copy() | dictionary.copy() | Returns a copy of the dictionary |
| fromkeys() | dict.fromkeys(keys, value) | Returns a dictionary with the specified keys and value |
| get() | dictionary.get(keyname, value) | Returns the value of the specified key |
| items() | dictionary.items() | Returns a list containing a tuple for each key value pair |
| keys() | dictionary.keys() | Returns a list containing the dictionary’s keys |
| pop() | dictionary.pop(keyname, defaultvalue) | Removes the element with the specified key |
| popitem() | dictionary.popitem() | Removes the last inserted key-value pair |
| setdefault() | dictionary.setdefault(keyname, value) | Returns the value of the specified key. If the key does not exist: insert the key, with the specified value |
| update() | dictionary.update(iterable) | Updates the dictionary with the specified key-value pairs |
| values() | dictionary.values() | Returns a list of all the values in the dictionary |