How to use the pynput.mouse.Button.left function in pynput

def test_itemscanvas_select(self):
        canvas = ItemsCanvas()
        canvas.pack()
        canvas.add_item("item", font=("default", 16))
        self.window.wm_geometry("+0+0")
        self.window.update()
        mouse_controller = Controller()
        mouse_controller.position = (30, 40)
        self.window.update()
        mouse_controller.press(Button.left)
        self.window.update()
        mouse_controller.release(Button.left)
        self.window.update()

def swipe(self, p1, p2, duration=0.5, steps=5, fingers=1, button='left'):
        if button is "middle":
            button = Button.middle
        elif button is "right":
            button = Button.right
        elif button is "left":
            button = Button.left
        else:
            raise ValueError("Unknow button: " + button)
        x1, y1 = p1
        x2, y2 = p2
        x1 = x1 + self.monitor["left"]
        x2 = x2 + self.monitor["left"]
        y1 = y1 + self.monitor["top"]
        y2 = y2 + self.monitor["top"]
        ratio_x = self.monitor["width"] / self.singlemonitor["width"]
        ratio_y = self.monitor["height"] / self.singlemonitor["height"]
        x2 = x1 + (x2 - x1) / ratio_x
        y2 = y1 + (y2 - y1) / ratio_y
        m = Controller()
        interval = float(duration) / (steps + 1)
        m.position = (x1, y1)
        m.press(button)

def swipe(self, p1, p2, duration=0.5, steps=5, fingers=1, button='left'):
        set_foreground_window(self.window)

        if button is "middle":
            button = Button.middle
        elif button is "right":
            button = Button.right
        elif button is "left":
            button = Button.left
        else:
            raise ValueError("Unknow button: " + button)

        x1, y1 = p1
        x2, y2 = p2
        # 设置坐标时相对于整个屏幕的坐标:
        x1 = x1 + self.monitor["left"]
        x2 = x2 + self.monitor["left"]
        y1 = y1 + self.monitor["top"]
        y2 = y2 + self.monitor["top"]
        # 双屏时，涉及到了移动的比例换算:
        if len(self.screen.monitors) > 2:
            ratio_x = (
                self.monitor["width"] + self.monitor["left"]) / self.singlemonitor["width"]
            ratio_y = (
                self.monitor["height"] + self.monitor["top"]) / self.singlemonitor["height"]

lastYPos = evDevValue  # X is Y
		elif evDevCode == WACOM_EVCODE_YPOS:
			lastXPos = evDevValue  # Y is X
		elif evDevCode == WACOM_EVCODE_XTILT:
			lastXTilt = evDevValue
		elif evDevCode == WACOM_EVCODE_YTILT:
			lastYTilt = evDevValue
		elif evDevCode == WACOM_EVCODE_DISTANCE:
			lastDistance = evDevValue
		elif evDevCode == WACOM_EVCODE_PRESSURE:
			if not ONLY_DEBUG:
				if not mouseButtonPressed and evDevValue > SCREEN_DRAW_BUTTON_PRESSURE:
					mouse.press(Button.left)
					mouseButtonPressed = True
				elif mouseButtonPressed and evDevValue <= SCREEN_DRAW_BUTTON_PRESSURE:
					mouse.release(Button.left)
					mouseButtonPressed = False

			lastPressure = evDevValue

		if ONLY_DEBUG:
			print('XPos: %5d | YPos: %5d | XTilt: %5d | YTilt: %5d | Distance: %3d | Pressure: %4d' % (lastXPos, lastYPos, lastXTilt, lastYTilt, lastDistance, lastPressure))
		else:
			screenX = SCREEN_DRAW_AREA_FROM_X + round(lastXPos * ratioX)                   # (X doesn't need to invert)
			screenY = SCREEN_DRAW_AREA_FROM_Y + round((WACOM_HEIGHT - lastYPos) * ratioY)  # (Y has to be inverted)
			mouseMoveAbs(screenX, screenY)

print('---------------------')

mouse_listener = mouse.Listener(
    on_move=on_move,
    on_scroll=on_scroll,
    on_click=on_click
)
mouse_listener.start()

time.sleep(1)


# ============ mouse control ============ 
mouse_ctl = mouse.Controller()
mouse_ctl.position = (100, 200)
mouse_ctl.press(Button.left)
mouse_ctl.position = (100, 150)
mouse_ctl.release(Button.left)
# mouse_ctl.scroll(0, 2)


time.sleep(1)


# ============ keyboard hook ============ 
def on_press(key):
    print('---- keyboard hook -----')
    if isinstance(key, Key):
        print('Key:', key.name, key.value.vk)
    elif isinstance(key, KeyCode):
        print('KeyCode:', key.char, key.vk)
    else:

def bounce():
    mouse.position = (180, 350)
    mouse.click(Button.left, 1)

mouse.position = startPos				#Set mouse position	

while grayThresh < 255:

	print("GrayThresh :", grayThresh)		#Prints the current max rgb value
	print((grayThresh / 255) * 100, "%")	#Prints the percentage (%)
	
	for i in range(len(img)):				#For each row:
		mouse.position = (startPos[0], mouse.position[1])
		mouse.move(0, 1)
		for j in range(len(img[i])):		#For each column:
			if grayThresh - threshStep < img[i, j, 0] <= grayThresh:	#If pixel(i(x), j(y)) has color darker than
																		#the current max rgb value (grayThresh) and brighter
																		#than the grayThresh before:
				mouse.click(Button.left, 1)		#Click (paint)
				time.sleep(0.0005)				#Some delay (This is needed for ms paint to properly register the clicks)
			mouse.move(1, 0)					#Move mouse cursor to the next pixel
			#print(mouse.position)
			
				
	grayThresh += threshStep		#After it scanned through the whole image, increase max rgb value (grayThresh)
									#by threshStep
	
	print("GrayThresh :", grayThresh)
	
	#	<>
	# All delays (time.sleep) are needed for ms paint to register the mouse / keyboard actions
	# They can be shortened
	
	mouse.position = (1030, 80)		#SELECT COLOR Button pixel coordinates
	mouse.click(Button.left, 1)

X = int(float(x.text))
    y = sauce.find('accelerometer2')
    Y = int(float(y.text))
    #z = sauce.find('accelerometer3')
    #Z = int(float(z.text))
    #print(X)
    #print(Y)
    #Pythagoras Theorem for 3rd axis
    #h1 = int(math.sqrt(X**2 + Z**2))
    #h2 = int(math.sqrt(Y**2 + Z**2))
    single_click = sauce.find('lightintensity')
    mouse.move(-X*4,-Y*4)
    
    #left click
    if int(float(single_click.text)) <= 10:
        mouse.click(Button.left)
        mouse.release(Button.left)
        #print("Right Click")

n = (b/740)*100 

	k = (width*m)/100
	c = (height*n)/100

	#pyautogui.FAILSAFE = False
	#pyautogui.moveTo(k,c)
	
	if check == True :
		#print('h')
		#mouse.position = (int(k), int(c))
		mouse.press(Button.left)
		mouse.release(Button.left)
        
	else:
           mouse.release(Button.left)

	check = False   

	cv2.imshow('frame',frame)
	cv2.imshow('dilate',otsu)

	k=cv2.waitKey(5) & 0xFF
	if k == 27:
		break


cv2.destroyAllWindows()
cap.release()

width, height = pyautogui.size()

	m = (a/1280)*100
	n = (b/740)*100 

	k = (width*m)/100
	c = (height*n)/100

	#pyautogui.FAILSAFE = False
	#pyautogui.moveTo(k,c)
	
	if check == True :
		#print('h')
		#mouse.position = (int(k), int(c))
		mouse.press(Button.left)
		mouse.release(Button.left)
        
	else:
           mouse.release(Button.left)

	check = False   

	cv2.imshow('frame',frame)
	cv2.imshow('dilate',otsu)

	k=cv2.waitKey(5) & 0xFF
	if k == 27:
		break


cv2.destroyAllWindows()