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List Operations

EasyPython Lists

Problem Statement

Perform common list operations.

Background

Python lists support many operations:

  • Append: lst.append(item)
  • Extend: lst.extend([items])
  • Insert: lst.insert(index, item)
  • Remove: lst.remove(item)
  • Pop: lst.pop(index)
  • Slice: lst[start:end]

Your Task

Write a function list_stats(numbers) that computes statistics about a list of numbers.

Output Format

Return a dictionary with:

  • "length": Number of elements
  • "sum": Sum of all elements
  • "min": Minimum value
  • "max": Maximum value
  • "first_three": First 3 elements as list
  • "last_three": Last 3 elements as list
  • "sorted": Sorted list (ascending)

Example:

Input:
[5, 2, 8, 1, 9, 3]
Output:
{'length': 6, 'sum': 28, 'min': 1, 'max': 9, 'first_three': [5, 2, 8], 'last_three': [1, 9, 3], 'sorted': [1, 2, 3, 5, 8, 9]}
Reasoning:

len() for length, sum() for sum, min()/max() for extremes, slicing for portions

Constraints:

  • List will have at least 3 elements
  • All elements are integers
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Test Results

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