Скачать или смотреть Converting List of String Coordinates into List of Lists without Strings in Python

Learn how to efficiently convert a list of string coordinates into a list of lists of coordinates in Python. This guide provides a step-by-step solution.
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Converting List of String Coordinates into List of Lists Without Strings in Python

Working with coordinates in Python is a common scenario for developers and data scientists alike. However, when dealing with coordinates represented as strings, it can get cumbersome if you want to manipulate them numerically. In this post, we will explore how to convert a list of string coordinates into a list of lists containing numerical coordinates, making them easier to work with in your applications.

The Problem

Imagine you have a list of coordinates formatted as strings, like this:

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

Your goal is to convert this list of strings into a list where each coordinate string is processed into a list of floats or integers. The desired output would look like this:

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

The Initial Attempt

You might be tempted to use a construct like this to achieve the conversion:

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

However, merely using map here will not yield the intended output. Instead, you’ll get a <map object> which doesn’t directly give you the lists of numbers you are aiming for.

The Solution

To achieve the conversion from a list of string coordinates to a list of list coordinates, you can use a combination of map() and list(). Here’s the effective way to rewrite your original attempt:

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

This single line of code does the following:

Splitting: For each string in my_list, the split(",") method divides the string into individual components based on the comma separator.

Mapping to Floats: Then map(float, ...) converts those string components into floats.

Converting to List: Finally, list(...) groups those floats into a list.

Step-by-Step Breakdown

Split each string into a list of two parts using split(",").

Convert each part from a string to a float using map(float, ...).

Group the resulting floats into a list using list(...).

Full Code Example

Putting it all together, your final code to convert string coordinates into numerical lists looks like this:

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

Expected Output

If you run the code above, the output will be:

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

Conclusion

By using the map and list functions together, you can seamlessly convert a list of string coordinates into a more usable list of numerical coordinates. This small adjustment in your code can simplify the handling of coordinate data significantly!

Now you're equipped with the knowledge to transform string coordinates into a usable format. Happy coding!