





from cva import COLOR_BGR2GRAY, cvtColor, imread, imshow, waitKey
from numpy import array, dot, pad, ravel, uinta, zeros







def      A__				(       SCREAMING_SNAKE_CASE__   ,   SCREAMING_SNAKE_CASE__)  ->       str:
  __snake_case    ,  __snake_case:		Optional[int]					    =		image.shape
  __snake_case:		Any					    =		cols - block_size[1] + 1
  __snake_case:		Tuple					    =		rows - block_size[0] + 1
  __snake_case:		List[Any]					    =		zeros((dst_height * dst_width, block_size[1] * block_size[0]))
  __snake_case:		Union[str, Any]					    =		0
  for i in range(0   ,   SCREAMING_SNAKE_CASE__):
    for j in range(0   ,   SCREAMING_SNAKE_CASE__):
      __snake_case:		int					    =		ravel(image[i : i + block_size[0], j : j + block_size[1]])
      __snake_case:		int					    =		window
      row += 1

  return image_array







def      A__				(       SCREAMING_SNAKE_CASE__   ,   SCREAMING_SNAKE_CASE__)  ->       Any:
  __snake_case    ,  __snake_case:		List[Any]					    =		image.shape[0], image.shape[1]
  __snake_case:		List[str]					    =		filter_kernel.shape[0]
  __snake_case:		Tuple					    =		k_size // 2
  # Pads image with the edge values of array.
  __snake_case:		Optional[Any]					    =		pad(SCREAMING_SNAKE_CASE__   ,   SCREAMING_SNAKE_CASE__   ,   mode="""edge""")

  # im2col, turn the k_size*k_size pixels into a row and np.vstack all rows
  __snake_case:		List[str]					    =		imacol(SCREAMING_SNAKE_CASE__   ,   (k_size, k_size))

  #  turn the kernel into shape(k*k, 1)
  __snake_case:		Tuple					    =		ravel(SCREAMING_SNAKE_CASE__)
  # reshape and get the dst image
  __snake_case:		List[Any]					    =		dot(SCREAMING_SNAKE_CASE__   ,   SCREAMING_SNAKE_CASE__).reshape(SCREAMING_SNAKE_CASE__   ,   SCREAMING_SNAKE_CASE__)
  return dst


if __name__ == "__main__":
      # read original image
      __UpperCAmelCase			:  List[str]										=				imread(R"../image_data/lena.jpg")
      # turn image in gray scale value
      __UpperCAmelCase			:  str										=				cvtColor(img, COLOR_BGR2GRAY)
      # Laplace operator
      __UpperCAmelCase			:  List[Any]										=				array([[0, 1, 0], [1, -4, 1], [0, 1, 0]])
      __UpperCAmelCase			:  List[str]										=				img_convolve(gray, Laplace_kernel).astype(uinta)
      imshow("Laplacian", out)
      waitKey(0)













from .balanced_parentheses import balanced_parentheses
from .stack import Stack







def      A__				(       SCREAMING_SNAKE_CASE__)  ->       int:
  return {"+": 1, "-": 1, "*": 2, "/": 2, "^": 3}.get(SCREAMING_SNAKE_CASE__   ,   -1)







def      A__				(       SCREAMING_SNAKE_CASE__)  ->       str:
  if not balanced_parentheses(SCREAMING_SNAKE_CASE__):
    raise ValueError("""Mismatched parentheses""")
  __snake_case:		Stack[str]					    =		Stack()
  __snake_case:		Any					    =		[]
  for char in expression_str:
    if char.isalpha() or char.isdigit():
      postfix.append(SCREAMING_SNAKE_CASE__)
    elif char == "(":
      stack.push(SCREAMING_SNAKE_CASE__)
    elif char == ")":
      while not stack.is_empty() and stack.peek() != "(":
        postfix.append(stack.pop())
      stack.pop()
    else:
      while not stack.is_empty() and precedence(SCREAMING_SNAKE_CASE__) <= precedence(stack.peek()):
        postfix.append(stack.pop())
      stack.push(SCREAMING_SNAKE_CASE__)
  while not stack.is_empty():
    postfix.append(stack.pop())
  return " ".join(SCREAMING_SNAKE_CASE__)


if __name__ == "__main__":
      from doctest import testmod

      testmod()
      __UpperCAmelCase			:  Optional[int]										=				"a+b*(c^d-e)^(f+g*h)-i"

      print("Infix to Postfix Notation demonstration:\n")
      print("Infix notation: " + expression)
      print("Postfix notation: " + infix_to_postfix(expression))






