Python dictionary allows you to store items as a key-value pair.
You can convert a dictionary to a list in Python using the list(yourdict.items()) method.
Basic Example
yourdict = {
"one": 1,
"two": 2,
"three": 3,
"four": 4,
"fourr": 4
}
list(yourdict.items())Output
[('one', 1), ('two', 2), ('three', 3), ('four', 4), ('fourr', 4)]This tutorial teaches you how to convert a dictionary to a list in python. You can convert dictionary keys or values to a list.
Convert Dictionary to List Of Tuples
You can convert a dictionary to a list of tuples using the list(dict.items()) method.
- The
dict.items()method returns a new view of the dictionary items as tuples. - Each tuple contains a
keyand thevalueof the dictionary. - For example,
(one,1). One tuple represents one entry in the dictionary.
When you pass these tuples to the list() constructor, the dictionary items are converted into a list of tuples.
Code
yourdict = {
"one": 1,
"two": 2,
"three": 3,
"four": 4,
"fourr": 4
}
list(yourdict.items())Output
[('one', 1), ('two', 2), ('three', 3), ('four', 4), ('fourr', 4)]Convert Dictionary Keys to List
You can use the dict.keys() method to convert dictionary keys to a list.
- The
keys()method returns a view of the dictionary keys. - Pass the view to the
list()constructor, and you’ll get a list of keys from the dictionary.
You can use this method when you just want to get the keys as a list.
Code
yourdict = {
"one": 1,
"two": 2,
"three": 3,
"four": 4,
"fourr": 4
}
list(yourdict.keys())Output
['one', 'two', 'three', 'four', 'fourr']Convert Dictionary Values To List
You can use the dict.values() method to convert dictionary values to a list.
- The
values()method returns a view of the dictionary values. - Pass the values view to the
list()constructor, and you’ll get a list of values from the dictionary.
You can use this method when you just want to get the values as a list.
Code
yourdict = {
"one": 1,
"two": 2,
"three": 3,
"four": 4,
"fourr": 4
}
list(yourdict.values())Output
[1, 2, 3, 4, 4]Using List Comprehension and Dict.items
List comprehension is a simpler syntax to iterate over an iterable and create a list.
- Use the list comprehension and
dict.items()method to convert dictionary items to alist. - You can also use list comprehension to convert keys or values alone to a list.
Use this method when you want to convert only specific keys or values to a list by specifying the condition in the list comprehension.
Code
yourdict = {
"one": 1,
"two": 2,
"three": 3,
"four": 4,
"fourr": 4
}
lst = [(k, v) for k, v in yourdict.items()]
lstOutput
All the items in the dictionary are converted to a list of tuples.
[('one', 1), ('two', 2), ('three', 3), ('four', 4), ('fourr', 4)]Converting Specific Dictionary Items to a List
To convert specific items of a dictionary to a list,
- specify the condition in the
ifstatement on the list comprehension.
Code
The following code demonstrates
- converting items with a value greater than two to a list.
- The condition is specified in the
ifstatement.
yourdict = {
"one": 1,
"two": 2,
"three": 3,
"four": 4,
"fourr": 4
}
lst = [(k, v) for k, v in yourdict.items() if v>2]
lstOutput
The dictionary items with a value greater than two are converted as a list of tuples.
[('three', 3), ('four', 4), ('fourr', 4)]Using Zip With Dict.keys and Dict.values
The zip function produces tuples with items from each iterable you pass.
- Pass the
dict.keys()anddict.values()as the iterables to zip it together and create a tuple.
The zip() accepts another parameter.
- another parameter is called
strict=False. It allows you to check the length of the iterable. - If this parameter is set to
True, aValueErrorwill be thrown when the length of the two tables is not equal.
Use this method to get the items as a list and when any of the dictionary keys doesn’t contain any value.
Code
yourdict = {
"one": 1,
"two": 2,
"three": 3,
"four": 4,
"fourr": 4
}
zip_items = zip(yourdict.keys(), yourdict.values())
lst = list(zip_items)
lstOutput
[('one', 1), ('two', 2), ('three', 3), ('four', 4), ('fourr', 4)]