How Can I Convert a Nested List of Strings to a Nested List of Floats Using List Comprehensions?

Converting a Nested List to Float with List Comprehensions

To process a nested list using list comprehensions, you can employ a two-level loop structure.

Given a nested list like:

l = [['40', '20', '10', '30'], ['20', '20', '20', '20', '20', '30', '20'], ['30', '20', '30', '50', '10', '30', '20', '20', '20'], ['100', '100'], ['100', '100', '100', '100', '100'], ['100', '100', '100', '100']]

To convert each element in l to a float with a nested list comprehension, you can use the following code:

[[float(y) for y in x] for x in l]

This nested comprehension loops through the outer list x and then the inner list y to convert each element to a float, resulting in a list of lists with floats.

For a flat list, you can use:

[float(y) for x in l for y in x]

In this case, the comprehension loops through the outer list first to avoid creating a nested list.

The above is the detailed content of How Can I Convert a Nested List of Strings to a Nested List of Floats Using List Comprehensions?. For more information, please follow other related articles on the PHP Chinese website!