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Here are a few title options in a question format, capturing the essence of your article: * How to Efficiently Determine Sublist Presence in Python? * Python Sublist Detection: A Concise Solution usi

Linda Hamilton
Linda HamiltonOriginal
2024-10-26 15:32:03152browse

Here are a few title options in a question format, capturing the essence of your article:

* How to Efficiently Determine Sublist Presence in Python?
* Python Sublist Detection: A Concise Solution using Functional Programming
* Sublist Hunting in Python:

Determining Sublist Presence in Python

The task at hand involves creating a function that ascertains the existence of a sublist within a larger list. Consider the following example:

<code class="python">list1 = [1,0,1,1,1,0,0]
list2 = [1,0,1,0,1,0,1]

# Expected results:
sublistExists(list1, [1,1,1]) == True
sublistExists(list2, [1,1,1]) == False</code>

Solution:

Leveraging Python's functional programming capabilities, we can define the following function:

<code class="python">def contains_sublist(lst, sublst):
    n = len(sublst)
    return any((sublst == lst[i:i+n]) for i in range(len(lst)-n+1))</code>

This solution operates by iterating through the larger list (lst) and comparing its sublists (of length equal to the sublist's length, n) to the given sublist (sublst). If a match is found, the function returns True. Otherwise, after O(m*n) operations (where m is the length of lst and n is the length of sublst), the function returns False.

This approach takes advantage of Python's efficient list slicing and functional programming constructs, providing a concise and efficient means of determining sublist presence.

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