input: from typing import List, Any
  
  def linearSearch(array: List[Any], search_item: Any) -> int:
      """ Perform a linear search through a given array and return the position of the search item if found, otherwise return -1.
      
      >>> linearSearch(['school', 'hospital', 'bookstore', 'mall', 'theatre'], 'bookstore')
      2
      >>> linearSearch(['school', 'hospital', 'bookstore', 'mall', 'theatre'], 'airport')
      -1
      """
      # Loop through array
      for i in range(len(array)):
          # If search item is found, return its position
          if array[i] == search_item:
              return i
      # If item is not found, return -1
      return -1
output:     # Loop through array
      for i in range(len(array)):
          # If search item is found, return its position
          if array[i] == search_item:
              return i
      # If item is not found, return -1
      return -1