Python

Question

我的变量中存储了两个坐标 points : [(100, 50)] 我试图用 pyautogui.moveTo(points) 移动鼠标，但出现错误：

pyautogui.PyAutoGUIException: The supplied sequence must have exactly 2 or exactly 4 elements (0 were received).

我假设这意味着我传递的是单个列表对象而不是坐标。

表达式 [(100, 50)] 是什么意思，我如何将 x 和 y 转换为两个元素。

我从中获取 points 的源代码：

import cv2 as cv
import numpy as np

class Vision:

# properties
needle_img = None
needle_w = 0
needle_h = 0
method = None

# constructor
def __init__(self, needle_img_path, method=cv.TM_CCOEFF_NORMED):
    self.needle_img = cv.imread(needle_img_path, cv.IMREAD_UNCHANGED)

    # Save the dimensions of the needle image
    self.needle_w = self.needle_img.shape[1]
    self.needle_h = self.needle_img.shape[0]

    self.method = method

def find(self, haystack_img, threshold=0.5, debug_mode=None):
    # run the OpenCV algorithm
    result = cv.matchTemplate(haystack_img, self.needle_img, self.method)
    # Get the all the positions from the match result that exceed our threshold
    locations = np.where(result >= threshold)
    locations = list(zip(*locations[::-1]))

    for loc in locations:
        rect = [int(loc[0]), int(loc[1]), self.needle_w, self.needle_h]
        # Add every box to the list twice in order to retain single (non-overlapping) boxes
        rectangles.append(rect)
        rectangles.append(rect)
    # Apply group rectangles
    rectangles, weights = cv.groupRectangles(rectangles, groupThreshold=1, eps=0.5)

    points = []
    if len(rectangles):

        line_color = (0, 255, 0)
        line_type = cv.LINE_4
        marker_color = (255, 0, 255)
        marker_type = cv.MARKER_CROSS

        # Loop over all the rectangles
        for (x, y, w, h) in rectangles:

            # Determine the center position
            center_x = x + int(w/2)
            center_y = y + int(h/2)
            # Save the points
            points.append((center_x, center_y))

            if debug_mode == 'rectangles':
                # Determine the box position
                top_left = (x, y)
                bottom_right = (x + w, y + h)
                # Draw the box
                cv.rectangle(haystack_img, top_left, bottom_right, color=line_color, 
                            lineType=line_type, thickness=2)
            elif debug_mode == 'points':
                # Draw the center point
                cv.drawMarker(haystack_img, (center_x, center_y), 
                            color=marker_color, markerType=marker_type, 
                            markerSize=40, thickness=2)

    if debug_mode:
        cv.imshow('Matches', haystack_img)

    return points

Answer 1

What does the expression [(100, 50)] mean and how I can I transform x and y into two elements.

[...] 创建一个列表，其中包含您放入其中的任何内容。 (100, 50) 创建一个包含整数 100 和 50 的元组。所以你有一个列表，其中包含一个包含两个数字的元组。

I assume this means I'm passing a single list object rather than the coordinates.

你是对的，有点。问题不在于您要传递单个列表对象，您需要传递单个列表^{，或者更确切地说，序列} 对象。问题是该列表对象仅包含 一个元素：元组。

您可以通过查看列表的 len 来检查：

>>> l = [(100, 50)]
>>> len(l)
1

按照您打算使用它的方式，pyautogui.moveTo(points) 想要一个包含两个元素的序列（列表或元组）。这些元素就是你要移动到的点的坐标。

列表里面的元组就是这个二元序列，所以需要传的就是：

pyautogui.moveTo(points[0])

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pyautogui