| Python: List comprehensions | - Big data with Python

Python supports a concept called "list comprehensions". It can be used to construct lists in a very natural, easy way, like a mathematician is used to do.

The following are common ways to describe lists (or sets, or tuples, or vectors) in mathematics.

set = {x² : x in {0 ... 9}}

tuple = (1, 2, 4, 8, ..., 2¹²)

vector = {x | x in S and x even}

The best way to learn new things is to take a practical approach of the things you want to learn. Here is a fragment of code that demonstrates the use of the list comprehensions statement in Python:

ƒ python command

def fibonacci(n):

a, b = 0, 1

for _ in range(1, n):

a, b = b, a + b

return b

print([fibonacci(i) for i in range(0, 10)]

√ output

[1, 1, 1, 2, 3, 5, 8, 13, 21, 34]