Javascript Dictionary Keys

Michael Zippo 04.11.2021

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You can convert a Python list to a dictionary using a dictionary comprehension method , dict.fromkeys () or zip (). The three methods create a new dictionary. They do not modify the existing list.

Lists and Python dictionaries are two structures used to store data. But what if you want to convert a list to a dictionary? You can do this if you want to assign a unique label to each value you saved. This is possible in a dictionary.

There are techniques and built-in functions that you can use in Python to convert a list to a dictionary. This programming tutorial will discuss, referring to examples, how to convert a list into a dictionary in Python.

Python lists and dictionaries

Lists and dictionaries are examples of Python collections. They allow you to store multiple similar values ‚Äã‚Äãtogether in a single data structure.

The data structure of the list allows you to store data in a specific order. Here is an example of a Python list:

Our list named takeout_prices contains four values.

Dictionaries, on the other hand, are not sorted and cannot store multiple duplicate values .

Here is an example of a Python dictionary :

Dictionaries are useful if you want labels associated with each value. Lists are best if you store similar data, such as price list or names, where each value cannot be labeled.

Python Convert List dictionary

You can convert a Python list in a dictionary using the dict.fromkeys process (), a dictionary comprehension, or the method of closure slide (). the zip () method is useful if you want to merge two lists into a dictionary

Let’s quickly summarize these methods:.

dict.fromkeys () - used to create a dictionary to from a list. You can also set a default value for all keys. You cannot set individual values ‚Äã‚Äãfor each item in the Dictionary
Understand Dictionary. Create a new dictionary from an existing list. You can specify different values ‚Äã‚Äãfor each key in the dictionary. Dictionary understandings are similar to Introducing Python Lists in the
zip () : structure. Convert two or more lists into a list of tuples. You can use the dict () method to convert the list of tuples into a dictionary

We will use each of the above three methods to show how to convert a list to a dictionary

Python list convert Dictionary: .fromkeys dict ()

Suppose we have a list of fruits that we want to turn into a dictionary. The value assigned to each fruit should be Available:

We could create this dictionary using the dict. fromkeys () method . This method accepts a list of keys that you want to turn into a dictionary. Optionally, you can specify a value that you want to assign to each key.

You can specify a single value to be assigned to each key. You can not say that one key must have a value and another key must have another value value t

Let ’s turn our list of fruits into a dictionary:.

Our code returns the objects in this list in a dictionary object:

First , we declare a Python variables called fruits which stores the names of the keys we want to use in our dictionary.

we are using dict.fromkeys () to create a dictionary that uses the key names that we have stored in the fruit array. This method assigns the value of each key as Available. Finally, we print the new dictionary to the console.

If we didn’t specify the Available Value in our code, the default for keys in our dictionary would be None.

convert Python list Dictionary: Understand Dictionary

We can also use a technique called Understand Dictionary to convert a Python list to a dictionary using the same one. The values ‚Äã‚Äã

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A dictionary understanding is similar to a list in the understanding that both methods create a new value of their respective data types. Dictionary understandings use square brackets ({}) while list understanding use square brackets ([])

Either convert our list of fruits into a dictionary using dictionary understanding:.

our code returns:

on the first, we declared a list called fruit that stores the names that we wanted to to move in a dictionary.

Next, we used the comprehension dictionary to cycle through each item in the fruit. We will add an item to our new dictionary for each fruit on our list. The value we assigned to each fruit was Available. Finally, we printed our new dictionary on the console