Merging dictionaries is a common operation in Python.
It allows you to combine two or more dictionaries into one.
In this tutorial, we will discuss how to merge two dictionaries in Python.
A dictionary is a collection of key-value pairs.
In Python, dictionaries are represented using curly braces {} and are separated by commas.
To merge two dictionaries, we can use the update() method or the ** operator.
Using the update() method
The update() method merges the key-value pairs from one dictionary into another.
If a key already exists in the destination dictionary, its value is updated with the value from the source dictionary.
If the key does not exist in the destination dictionary, it is added along with its value.
Here’s an example:
dict1 = {'a': 1, 'b': 2}
dict2 = {'c': 3, 'd': 4}
dict1.update(dict2)
print(dict1)Output:
{'a': 1, 'b': 2, 'c': 3, 'd': 4}Using the ** operator
The ** operator can also be used to merge dictionaries.
It unpacks the key-value pairs from one dictionary and adds them to another.
If a key already exists in the destination dictionary, its value is updated with the value from the source dictionary.
If the key does not exist in the destination dictionary, it is added along with its value.
Here’s an example:
dict1 = {'a': 1, 'b': 2}
dict2 = {'c': 3, 'd': 4}
merged_dict = {**dict1, **dict2}
print(merged_dict)Output:
{'a': 1, 'b': 2, 'c': 3, 'd': 4}In the above example, we created a new dictionary merged_dict by unpacking the key-value pairs from dict1 and dict2.
Conclusion
In this tutorial, we discussed two ways to merge dictionaries in Python: using the update() method and the ** operator.
Both methods have their own advantages, and you can choose the one that suits your needs.
Merging dictionaries is a common operation in Python, and you can use it to combine two or more dictionaries into one.
