Скачать или смотреть Finding the Python Equivalent of JavaScript's Shorthand for Object Literals

Explore how to create dictionaries in Python using local variables, mimicking the shorthand syntax from JavaScript for concise coding.
---
This video is based on the question https://stackoverflow.com/q/76996360/ asked by the user 'ThinkingInBits' ( https://stackoverflow.com/u/324243/ ) and on the answer https://stackoverflow.com/a/76996528/ provided by the user 'Barmar' ( https://stackoverflow.com/u/1491895/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Is there a python equivalent to javascript's shorthand for setting key:value pairs where the local variable name is the same as the key name?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Finding the Python Equivalent of JavaScript's Shorthand for Object Literals

If you're familiar with JavaScript, you may have encountered the convenient shorthand method for creating object literals. This method allows you to create objects without explicitly stating the keys if they match the variable names. The question arises: Is there a similar approach in Python for creating dictionaries? Let’s delve into the details.

The Problem: JavaScript Object Literal Shorthand

In JavaScript, if you define variables like this:

[[See Video to Reveal this Text or Code Snippet]]

You can create an object using the following shorthand notation:

[[See Video to Reveal this Text or Code Snippet]]

This code effectively creates an object named person with properties name and age matching the variable names, resulting in:

[[See Video to Reveal this Text or Code Snippet]]

The simplicity and readability of this shorthand can be quite appealing, and many Python developers wonder if they can achieve similar functionality in their code.

The Solution: Creating a Function in Python

Unfortunately, Python does not offer a built-in shorthand for this functionality. However, you can mimic the behavior by defining a custom function that takes advantage of the locals() built-in function. Here’s how to do it:

Defining the Function

You can create a function called dictvars that accepts the local variables and desired names to create a dictionary in a manner similar to JavaScript.

[[See Video to Reveal this Text or Code Snippet]]

Utilizing the Function

Here’s an example of how to use this function to create a dictionary representing a person:

[[See Video to Reveal this Text or Code Snippet]]

Breaking It Down

Function Definition: dictvars takes two parameters:

l: This represents the local variables, obtained via locals().

*names: This allows for variable-length arguments corresponding to the variable names you want to include in your dictionary.

Dictionary Comprehension: The function constructs a dictionary by looping through the provided names and checking if they exist in locals(). If they do, it adds them as key-value pairs.

Local Variables Access: When calling makeperson, we can pass the age variable and create a dictionary that includes both name and age easily.

Conclusion

While Python currently does not possess a native shorthand for simplifying dictionary creation with local variables, defining a small helper function can effectively bridge the gap. By implementing the dictvars function, Python developers can achieve a level of efficiency and clarity similar to JavaScript's object literals. Embracing these coding practices can enhance your productivity and readability in your Python projects.

Now you can keep your code concise and elegant—just like in JavaScript!