为什么我的 Python window 变黑了？ Python 街机库

Question

我正在尝试这样做 example。所以，我将整个代码复制并粘贴到 Pycharm:

"""
Example "Arcade" library code.

This example shows the drawing primitives and how they are used.
It does not assume the programmer knows how to define functions or classes
yet.

API documentation for the draw commands can be found here:
http://arcade.academy/quick_index.html#id1

A video explaining this example can be found here:
https://vimeo.com/167158158

If Python and Arcade are installed, this example can be run from the command line with:
python -m arcade.examples.drawing_primitives
"""

# Import the Arcade library. If this fails, then try following the instructions
# for how to install arcade:
# http://arcade.academy/installation.html
import arcade
import os

# Open the window. Set the window title and dimensions (width and height)
arcade.open_window(600, 600, "Drawing Primitives Example")

# Set the background color to white
# For a list of named colors see
# http://arcade.academy/arcade.color.html
# Colors can also be specified in (red, green, blue) format and
# (red, green, blue, alpha) format.
arcade.set_background_color(arcade.color.WHITE)

# Start the render process. This must be done before any drawing commands.
arcade.start_render()

# Draw a grid
# Draw vertical lines every 120 pixels
for x in range(0, 601, 120):
arcade.draw_line(x, 0, x, 600, arcade.color.BLACK, 2)

# Draw horizontal lines every 200 pixels
for y in range(0, 601, 200):
arcade.draw_line(0, y, 800, y, arcade.color.BLACK, 2)

# Draw a point
arcade.draw_text("draw_point", 3, 405, arcade.color.BLACK, 12)
arcade.draw_point(60, 495, arcade.color.RED, 10)

# Draw a set of points
arcade.draw_text("draw_points", 123, 405, arcade.color.BLACK, 12)
point_list = ((165, 495),
(165, 480),
(165, 465),
(195, 495),
(195, 480),
(195, 465))
arcade.draw_points(point_list, arcade.color.ZAFFRE, 10)

# Draw a line
arcade.draw_text("draw_line", 243, 405, arcade.color.BLACK, 12)
arcade.draw_line(270, 495, 300, 450, arcade.color.WOOD_BROWN, 3)

# Draw a set of lines
arcade.draw_text("draw_lines", 363, 405, arcade.color.BLACK, 12)
point_list = ((390, 450),
(450, 450),
(390, 480),
(450, 480),
(390, 510),
(450, 510)
)
arcade.draw_lines(point_list, arcade.color.BLUE, 3)

# Draw a line strip
arcade.draw_text("draw_line_strip", 483, 405, arcade.color.BLACK, 12)
point_list = ((510, 450),
(570, 450),
(510, 480),
(570, 480),
(510, 510),
(570, 510)
)
arcade.draw_line_strip(point_list, arcade.color.TROPICAL_RAIN_FOREST, 3)

# Draw a polygon
arcade.draw_text("draw_polygon_outline", 3, 207, arcade.color.BLACK, 9)
point_list = ((30, 240),
(45, 240),
(60, 255),
(60, 285),
(45, 300),
(30, 300))
arcade.draw_polygon_outline(point_list, arcade.color.SPANISH_VIOLET, 3)

# Draw a filled in polygon
arcade.draw_text("draw_polygon_filled", 123, 207, arcade.color.BLACK, 9)
point_list = ((150, 240),
(165, 240),
(180, 255),
(180, 285),
(165, 300),
(150, 300))
arcade.draw_polygon_filled(point_list, arcade.color.SPANISH_VIOLET)

# Draw an outline of a circle
arcade.draw_text("draw_circle_outline", 243, 207, arcade.color.BLACK, 10)
arcade.draw_circle_outline(300, 285, 18, arcade.color.WISTERIA, 3)

# Draw a filled in circle
arcade.draw_text("draw_circle_filled", 363, 207, arcade.color.BLACK, 10)
arcade.draw_circle_filled(420, 285, 18, arcade.color.GREEN)

# Draw an ellipse outline, and another one rotated
arcade.draw_text("draw_ellipse_outline", 483, 207, arcade.color.BLACK, 10)
arcade.draw_ellipse_outline(540, 273, 15, 36, arcade.color.AMBER, 3)
arcade.draw_ellipse_outline(540, 336, 15, 36,
arcade.color.BLACK_BEAN, 3, 45)

# Draw a filled ellipse, and another one rotated
arcade.draw_text("draw_ellipse_filled", 3, 3, arcade.color.BLACK, 10)
arcade.draw_ellipse_filled(60, 81, 15, 36, arcade.color.AMBER)
arcade.draw_ellipse_filled(60, 144, 15, 36,
arcade.color.BLACK_BEAN, 45)

# Draw an arc, and another one rotated
arcade.draw_text("draw_arc/filled_arc", 123, 3, arcade.color.BLACK, 10)
arcade.draw_arc_outline(150, 81, 15, 36,
arcade.color.BRIGHT_MAROON, 90, 360)
arcade.draw_arc_filled(150, 144, 15, 36,
arcade.color.BOTTLE_GREEN, 90, 360, 45)

# Draw an rectangle outline
arcade.draw_text("draw_rect", 243, 3, arcade.color.BLACK, 10)
arcade.draw_rectangle_outline(295, 100, 45, 65,
arcade.color.BRITISH_RACING_GREEN)
arcade.draw_rectangle_outline(295, 160, 20, 45,
arcade.color.BRITISH_RACING_GREEN, 3, 45)

# Draw a filled in rectangle
arcade.draw_text("draw_filled_rect", 363, 3, arcade.color.BLACK, 10)
arcade.draw_rectangle_filled(420, 100, 45, 65, arcade.color.BLUSH)
arcade.draw_rectangle_filled(420, 160, 20, 40, arcade.color.BLUSH, 45)

# Load and draw an image to the screen
# Image from kenney.nl asset pack #1
arcade.draw_text("draw_bitmap", 483, 3, arcade.color.BLACK, 12)
texture = arcade.load_texture(":resources:images/space_shooter/playerShip1_orange.png")
scale = .6
arcade.draw_scaled_texture_rectangle(540, 120, texture, scale, 0)
arcade.draw_scaled_texture_rectangle(540, 60, texture, scale, 45)

# Finish the render.
# Nothing will be drawn without this.
# Must happen after all draw commands
arcade.finish_render()

# Keep the window up until someone closes it.
arcade.run()

然后，我单击按钮“运行”，以便运行我的代码和 Python window 打开并且一切正常：

但是，在我最小化 Python window 之后，它变暗了：

我正在编码： Windows 10/ Pycharm2021.2（社区版）/ Python3.8.5/ 街机 2.5.7

Answer 1

我能够用这个简单的例子重现它：

import arcade
arcade.open_window(600, 400, 'Drawing Primitives Example')
arcade.start_render()
arcade.draw_rectangle_filled(300, 200, 300, 200, arcade.color.RED)
arcade.finish_render()
arcade.run()

arcade 似乎有问题。您可以使用 class 方法避免这种情况：

import arcade

class Game(arcade.Window):
    def __init__(self):
        super().__init__(600, 400)

    def on_draw(self):
        arcade.start_render()
        arcade.draw_rectangle_filled(300, 200, 300, 200, arcade.color.RED)

Game()
arcade.run()

为什么我的 Python window 变黑了？ Python 街机库

Why my Python window gets dark? Python Arcade Library

arcade