Python dictionary get() usage and example

Python dictionary methods

If the key is in the dictionary, the get() method returns the value of the specified key.

The syntax of get():

dict.get(key[, value])

get() parameters

The get() method can use up to two parameters:

• key -The key to be searched in the dictionary

• value(Optional)-If the key is not found, then return value. The default value is None.

get() return value

get() method returns:

• If the key is in the dictionary, the value of the key is specified.

• None - If the key is not found and no value is specified.

• value - If the key is not found and a value is specified.

Example1How to use get() in dictionaries?

person = {'name': 'Phill', 'age':　22{}
print('Name: ', person.get('name'))
print('Age: ', person.get('age'))
# No value provided
print('Salary: ', person.get('salary'))
# Provide value
print('Salary: ', person.get('salary', 0.0))

When running this program, the output is:

Name: Phill
Age:　　22
Salary: None
Salary: 0.0

Python get() method and dict [key] element access

If the key lacks the get() method, the default value is returned.

However, if the key is not found when using dict[key], a KeyError exception will be raised.

print('Salary: ', person.get('salary'))
print(person['salary'])

When running this program, the output is:

Traceback (most recent call last):
　　File '...', line　1, in <module>
　　　　print('Salary: ', person.get('salary'))
NameError: name 'person' is not defined

Python dictionary methods