YASS to Python linear search

function linearSearch($item_list, $search_item) : number | boolean {
  $found = false
  $index = 0 
  $position = -1 
  while ($index < count($item_list) and $found == false){ 
      if ($item_list[$index] == $search_item){ 
       $found = true 
         $position = $index 
      }
      $index++ 
    } 
  if($found){ 
      print("Item found at position", $position)  
  } else{ 
      print("Item not found")  
  } 
} 
    
function main(){ 
  $l = [3, 5, 7] 
  linearSearch($l, 6) 
} 

def linearSearch(item_list, search_item):
  found = False
  index = 0
  position = -1
  while index < len(item_list) and found == False:
    if item_list[index] == search_item:
      found = True
      position = index

    index += 1

  if found:
    print("Item found at position", position)
  else:
    print("Item not found")


def main():
  l = [3, 5, 7]
  linearSearch(l, 5)


main()