input: from typing import List, Tuple
  
  def explain_list_tuple_difference(category: str) -> str:
      """
      Explain the difference between a list and a tuple in Python based on the given category.
      The possible categories are: 'mutability', 'syntax', and 'usage'.
  
      >>> explain_list_tuple_difference('mutability')
      'The difference in mutability between a list and a tuple in Python is that a list is mutable, meaning its contents can be changed, while a tuple is immutable, meaning its contents cannot be changed.'
  
      >>> explain_list_tuple_difference('syntax')
      'The difference in syntax between a list and a tuple in Python is that a list has square brackets around it, while a tuple has parentheses around it.'
  
      >>> explain_list_tuple_difference('usage')
      'The difference in usage between a list and a tuple in Python is that lists are used when the data needs to be changed, while tuples are used when the data is fixed and cannot be changed.'
      """
      differences = {
          'mutability': "The difference in mutability between a list and a tuple in Python is that a list is mutable, meaning its contents can be changed, while a tuple is immutable, meaning its contents cannot be changed.",
          'syntax': "The difference in syntax between a list and a tuple in Python is that a list has square brackets around it, while a tuple has parentheses around it.",
          'usage': "The difference in usage between a list and a tuple in Python is that lists are used when the data needs to be changed, while tuples are used when the data is fixed and cannot be changed."
      }
      return differences.get(category, "Invalid category.")
output:     differences = {
          'mutability': "The difference in mutability between a list and a tuple in Python is that a list is mutable, meaning its contents can be changed, while a tuple is immutable, meaning its contents cannot be changed.",
          'syntax': "The difference in syntax between a list and a tuple in Python is that a list has square brackets around it, while a tuple has parentheses around it.",
          'usage': "The difference in usage between a list and a tuple in Python is that lists are used when the data needs to be changed, while tuples are used when the data is fixed and cannot be changed."
      }
      return differences.get(category, "Invalid category.")