Python matplotlib.pyplot.ginput() Examples

def preferred_board(self, old, moves, context):
        game = context
        if game.over:
            return
        game.wait_human = True

        plt.title('set down a stone')
        happy = False
        while not happy:
            pts = np.asarray(plt.ginput(1, timeout=-1, show_clicks=False))
            if len(pts) != 1:
                continue

            i, j = map(round, (pts[0, 0], pts[0, 1]))
            loc = int(i * Board.BOARD_SIZE + j)
            if old.stones[loc] == Board.STONE_EMPTY:
                return [b for b in moves if b.stones[loc] != Board.STONE_EMPTY][0]
            else:
                plt.title('invalid move')
                continue 

def click_one_polygon(self):
        """
        Open a matplotlib window to click a closed polygon to mask.
        """

        sc = self.scene

        fig = plt.figure()
        ax = fig.add_axes([0.05, 0.05, 0.9, 0.9])
        ax.imshow(sc.displacement, origin='lower')
        ax.set_title('Click to add vertex. Press ENTER to finish.')

        #  Click polygon to mask
        vertices = plt.ginput(-1)
        self.add_polygon(vertices) 

def select_start_goal_points(ax, img):
    print 'Select a starting point'
    ax.set_xlabel('Select a starting point')
    occupied = True
    while occupied:
        point = ppl.ginput(1, timeout=-1, show_clicks=False, mouse_pop=2)
        start = [int(point[0][0]), int(point[0][1])]
        if img[start[1]][start[0]]:
            print 'Starting point:', start
            occupied = False
            ax.plot(start[0], start[1], '.r')
        else:
            print 'Cannot place a starting point there'
            ax.set_xlabel('Cannot place a starting point there, choose another point')

    print 'Select a goal point'
    ax.set_xlabel('Select a goal point')
    occupied = True
    while occupied:
        point = ppl.ginput(1, timeout=-1, show_clicks=False, mouse_pop=2)
        goal = [int(point[0][0]), int(point[0][1])]
        if img[goal[1]][goal[0]]:
            print 'Goal point:', goal
            occupied = False
            ax.plot(goal[0], goal[1], '.b')
        else:
            print 'Cannot place a goal point there'
            ax.set_xlabel('Cannot place a goal point there, choose another point')

    ppl.draw()
    return start, goal 

def _get_captcha(self, lang: str):
        """
        请求验证码的 API 接口，无论是否需要验证码都需要请求一次
        如果需要验证码会返回图片的 base64 编码
        根据 lang 参数匹配验证码，需要人工输入
        :param lang: 返回验证码的语言(en/cn)
        :return: 验证码的 POST 参数
        """
        if lang == 'cn':
            api = 'https://www.zhihu.com/api/v3/oauth/captcha?lang=cn'
        else:
            api = 'https://www.zhihu.com/api/v3/oauth/captcha?lang=en'
        resp = self.session.get(api)
        show_captcha = re.search(r'true', resp.text)

        if show_captcha:
            put_resp = self.session.put(api)
            json_data = json.loads(put_resp.text)
            img_base64 = json_data['img_base64'].replace(r'\n', '')
            with open('./captcha.jpg', 'wb') as f:
                f.write(base64.b64decode(img_base64))
            img = Image.open('./captcha.jpg')
            if lang == 'cn':
                import matplotlib.pyplot as plt
                plt.imshow(img)
                print('点击所有倒立的汉字，在命令行中按回车提交')
                points = plt.ginput(7)
                capt = json.dumps({'img_size': [200, 44],
                                   'input_points': [[i[0] / 2, i[1] / 2] for i in points]})
            else:
                img_thread = threading.Thread(target=img.show, daemon=True)
                img_thread.start()
                # 这里可自行集成验证码识别模块
                capt = input('请输入图片里的验证码：')
            # 这里必须先把参数 POST 验证码接口
            self.session.post(api, data={'input_text': capt})
            return capt
        return ''