Python - Create a List of Floats

Creating a list of floats in Python can be done in several simple ways. The easiest way to create a list of floats is to define the numbers directly. Here’s how we can do it:

a = [0.1, 2.3, 4.5, 6.7]
print(a)

[0.1, 2.3, 4.5, 6.7]

Using List Comprehension

List comprehension is a shorter way to create lists. It’s very useful when we need to perform an operation while creating the list. Here’s how we can create a list of float numbers:

a = [x * 0.5 for x in range(5)]
print(a)

[0.0, 0.5, 1.0, 1.5, 2.0]

Using range() with map and lambda

If you want to create a list of floats based on a mathematical operation, map() combined with lambda can be efficient.

a = list(map(lambda x: x * 0.5, range(10)))
print(a)

[0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5]

Using numpy (for large lists or more complex operations)

If you're dealing with a large number of floats or need specialized functionality like linspace, numpy is a highly optimized library for handling numerical operations.

import numpy as np

# List of 10 floats from 0.0 to 5.0
a = np.linspace(0.0, 5.0, num=10)
print(a)