Accessing values of a dictionary in Python

In Python, a dictionary is a data structure that's used to store key-value pairs. Dictionaries are incredibly helpful, as they enable you to easily store and retrieve data. In this tutorial, you'll learn how to access the values of a dictionary in Python. Whether you're new to Python or have some experience, this tutorial will provide you with a fundamental knowledge of how to manipulate values in a dictionary. So, let's dive in and learn how to access the values of a dictionary using Python!

Accessing values of a dictionary : 

• We can access the values of a dictionary by using : 
  • square brackets
  • get() method.

Accessing values Using square bracket notation :

• The basic syntax of accessing values from dictionary using square brackets is :  value = d[key] 
• If we try to access a key that does not exist, then python interpreter will raise an error.
• Code Sample : 

quantities = {
    "apple": 10,
    "oranges": 20,
    "banana": 25,
    "Mangoes": 35
}

print("Printing Quantities of fruits :")
print("Quantity of apples = ", quantities["apple"])
print("Quantity of oranges = ", quantities["oranges"])
print("Quantity of banana = ", quantities["banana"])
print("Quantity of Mangoes = ", quantities["Mangoes"])


# Output
# Printing Quantities of fruits :
# Quantity of apples =  10
# Quantity of oranges =  20
# Quantity of banana =  25
# Quantity of Mangoes =  35

Accessing values using the get() method :

• The basic syntax of accessing values from dictionary using  get()  method is :  value = d.get(key) 
• If we try to access a key that does not exist, then  get()  method will return  None .
• We can also pass a second argument to the  get()  method which will be used as the default value.
• In other words this second parameter will be returned if the key does not exist in the dictionary.
• Code Sample : 

quantities = {
    "apple": 10,
    "oranges": 20,
    "banana": 25,
    "Mangoes": 35
}

print("Printing Quantities of fruits :")
print("Quantity of apples = ", quantities.get("apple"))
print("Quantity of oranges = ", quantities.get("oranges"))
print("Quantity of banana = ", quantities.get("banana"))
print("Quantity of Mangoes = ", quantities.get("Mangoes"))

print("Quantity of Guavas = ", quantities.get("Guavas"))
print("Quantity of Guavas = ", quantities.get("Guavas", "Zero"))


# Output
# Printing Quantities of fruits :
# Quantity of apples =  10
# Quantity of oranges =  20
# Quantity of banana =  25
# Quantity of Mangoes =  35
# Quantity of Guavas =  None
# Quantity of Guavas =  Zero