Sequence classifier Python Codewars

A series or sequence of numbers is usually the product of a function and can either be infinite or finite.

Task:

In this kata we will only consider finite series and you are required to return a code according to the type of sequence:

Code Example

0 unordered [3,5,8,1,14,3]

1 strictly increasing [3,5,8,9,14,23]

2 not decreasing [3,5,8,8,14,14]

3 strictly decreasing [14,9,8,5,3,1]

4 not increasing [14,14,8,8,5,3]

5 constant [8,8,8,8,8,8]

You can expect all the inputs to be non-empty and completely numerical arrays/lists - no need to validate the data; do not go for sloppy code, as rather large inputs might be tested.

Solution:

def sequence_classifier(arr):
    if len(set(arr)) == 1: return 5
    elif sorted(arr) == arr and len(arr) == len(set(arr)): return 1
    elif sorted(arr) == arr: return 2
    elif sorted(arr[::-1]) == arr[::-1] and len(arr) == len(set(arr)): return 3
    elif sorted(arr[::-1]) == arr[::-1]: return 4
    else: return 0

print(sequence_classifier([3,5,8,8,14,23]))

Sequence classifier Solutions | Codewars

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