magic-list 2.0.0

Magic List is a module that extends the built-in list type.

Magic List

Magic List is a module that extends the built-in list type.

[!NOTE] Its development is entirely test-driven: it is battery-tested and requires a test coverage of 100%. It also provides typing stub files.

User-friendly documentation is hopefully coming soon.

Examples

Fibonacci sequence

In the functional programming spirit, let's write a function that given an integer n, returns the fibonacci sequence up to the n-th member.

For example, fibonacci_sequence(10) would return [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55].

import operator

from magic_list import L, list

def fibonacci_sequence(n: int) -> list[int]:
    # let's start by creating a list with the first two members, 0 and 1.
    base = L[0, 1]

    # we define a function that we will use to generate the next members of
    # the sequence
    def next_member(current: list[int]) -> int:
        return current.take_right(2).sum()

    return base.fill_right(next_member, n - 1)

[!NOTE]
The L[0, 1] notation is a way to construct magic lists nicely.

[!IMPORTANT]
list is from magic_list as a drop-in replacement of the built-in!

Fibonacci n-th member

Wanted to define a function that returns the n-th member of the Fibonacci sequence for a laugh? We have that: it is called fibonacci_sequence(n).last!