python dictionary methods explanation and visualization

python dictionary methods

get()

• Returns the value of the specified key

fruits = {'grape': '🍇', 'Watermelon': '🍉', 'banana': '🍌', 'mango': '🥭', 'apple': '🍎'}

x = fruits.get("mango")

# output
🥭

clear()

• Removes all the elements from the dictionary

fruits = {'grape': '🍇', 'Watermelon': '🍉', 'banana': '🍌', 'mango': '🥭', 'apple': '🍎'}
fruits.clear()

# output
{}

copy()

• Returns a copy of the dictionary

fruits = {'grape': '🍇', 'Watermelon': '🍉', 'banana': '🍌', 'mango': '🥭', 'apple': '🍎'}

x = fruits.copy()

# output
{'grape': '🍇', 'Watermelon': '🍉', 'banana': '🍌', 'mango': '🥭', 'apple': '🍎'}

keys()

• Returns a list containing the dictionary's keys

fruits = {'grape': '🍇', 'Watermelon': '🍉', 'banana': '🍌', 'mango': '🥭', 'apple': '🍎'}

x = fruits.keys()

# output
dict_keys(['grape', 'Watermelon', 'banana', 'mango', 'apple'])

update()

• Updates the dictionary with the specified key-value pairs

fruits = {'grape': '🍇', 'Watermelon': '🍉', 'banana': '🍌', 'mango': '🥭', 'apple': '🍎'}
fruits.update({"strawberry":"🍓"})

# output
{'grape': '🍇', 'Watermelon': '🍉', 'banana': '🍌', 'mango': '🥭', 'apple': '🍎', 'strawberry': '🍓' }

values()

• Returns a list of all the values in the dictionary

fruits = {'grape': '🍇', 'Watermelon': '🍉', 'banana': '🍌', 'mango': '🥭', 'apple': '🍎'}
x = fruits.values()

# output
dict_values(['🍇', '🍉', '🍌', '🥭', '🍎'])

pop()

• Removes the element with the specified key

fruits = {'grape': '🍇', 'Watermelon': '🍉', 'banana': '🍌', 'mango': '🥭', 'apple': '🍎'}
fruits.pop('Watermelon')

# output
{'grape': '🍇', 'banana': '🍌', 'mango': '🥭', 'apple': '🍎'}

items()

• Returns a list containing a tuple for each key value pair

fruits = {'grape': '🍇', 'Watermelon': '🍉', 'banana': '🍌', 'mango': '🥭', 'apple': '🍎'}
x = fruits.items()

# output
dict_items([('grape', '🍇'), ('Watermelon', '🍉'), ('banana', '🍌'), ('mango', '🥭'), ('apple', '🍎' )])

fromkeys()

• Returns a dictionary with the specified keys and value

x = ['grape1', 'grape2', 'grape3']
y = '🍇'

fruits = dict.fromkeys(x, y)

# output
{'grape1': '🍇', 'grape2': '🍇', 'grape3': '🍇'}

popitem()

• Removes the last inserted key-value pair

fruits = {'grape': '🍇', 'Watermelon': '🍉', 'banana': '🍌', 'mango': '🥭', 'apple': '🍎'}
fruits.popitem()

# output
{'grape': '🍇', 'Watermelon': '🍉', 'banana': '🍌', 'mango': '🥭'}

setdefault()

• Returns the value of the specified key.
• If the key does not exist: insert the key, with the specified value.

fruits = {'grape': '🍇', 'Watermelon': '🍉', 'banana': '🍌', 'mango': '🥭', 'apple': '🍎'}

x = fruits.setdefault("grape", None)

# output
{'grape': '🍇', 'Watermelon': '🍉', 'banana': '🍌', 'mango': '🥭', 'apple': '🍎'}

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