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How-to articles, tricks, and solutions about DICTIONARY

How do I print the key-value pairs of a dictionary in python

You can use the items() method to print the key-value pairs of a dictionary in Python.

python dictionary

How do I sort a dictionary by key?

In Python, dictionaries are unordered collections of key-value pairs.

python dictionary sorting

How do I sort a dictionary by value?

You can use the sorted() function and pass it the dictionary, along with the key parameter set to a lambda function that returns the value from the dictionary.

python dictionary sorting

How do I sort a list of dictionaries by a value of the dictionary?

To sort a list of dictionaries by a value of the dictionary, you can use the sorted() function and specify the key parameter to be a lambda function that returns the value you want to sort by.

list python dictionary sorting data-structures

How do you create a dictionary in Java?

To create a dictionary (or map) in Java, you can use the Map interface and its implementing classes.

java dictionary key-value

How does collections.defaultdict work?

collections.defaultdict is a subclass of the built-in dict class in Python.

python dictionary default-value defaultdict

How to copy a dictionary and only edit the copy

There are a few ways to copy a dictionary in Python, depending on the level of copying that you need.

reference python dictionary

How to directly initialize a HashMap in Java?

To directly initialize a HashMap in Java, you can use the put() method to add elements to the map.

java collections initialization dictionary

How to print a dictionary's key?

To print the keys of a dictionary in Python, you can use the built-in keys() method.

key python dictionary

How to return dictionary keys as a list in Python?

In Python, you can use the dict.keys() method to return a view object that contains the keys of a dictionary.

list python dictionary python-3.x python-2.x