Sometimes, we want to convert a list of lists into a Python NumPy array.
In this article, we’ll look at how to convert a list of lists into a Python NumPy array.
How to convert a list of lists into a Python NumPy array?
To convert a list of lists into a Python NumPy array, we can create an array of arrays with the numpy.array method.
For instance, we write:
import numpy
x = [[1, 2], [1, 2, 3], [1]]
y = numpy.array([numpy.array(xi) for xi in x], dtype=object)
print(y)
We call numpy.array with a list that converts the lists inside x to array with numpy.array(xi) for xi in x.
And we set dtype to object.
As a result, we see that y is [array([1, 2]) array([1, 2, 3]) array([1])].
Conclusion
To convert a list of lists into a Python NumPy array, we can create an array of arrays with the numpy.array method.
