python通过PyGame绘制图像并保存为图片文件的代码

把开发过程中常用的一些内容片段记录起来，下边内容是关于python通过PyGame绘制图像并保存为文件的内容，希望对大伙有较大好处。

''' pg_draw_circle_save101py

draw a blue solid circle on a white background

save the drawing to an image file

tested with Python 27 and PyGame 192 by vegaseat  16may2013

'''

import pygame as pg

# pygame uses (r, g, b) color tuples

white = (255, 255, 255)

blue = (0, 0, 255)

width = 300

height = 300

# create the display window

win = pgdisplayset_mode((width, height))

# optional title bar caption

pgdisplayset_caption("Pygame draw circle and save")

# default background is black, so make it white

winfill(white)

# draw a blue circle

# center coordinates (x, y)

radius = min(center)

# width of 0 (default) fills the circle

# otherwise it is thickness of outline

width = 0

# drawcircle(Surface, color, pos, radius, width)

pgdrawcircle(win, blue, center, radius, width)

# now save the drawing

# can save as bmp tga png or jpg

fname = "circle_bluepng"

pgimagesave(win, fname)

print("file {} has been saved"format(fname))

# update the display window to show the drawing

pgdisplayflip()

# event loop and exit conditions

# (press escape key or click window title bar x to exit)

while True:

    for event in pgeventget():

        if eventtype == pgQUIT:

            # most reliable exit on x click

            pgquit()

            raise SystemExit

        elif eventtype == pgKEYDOWN:

            # optional exit with escape key

            if eventkey == pgK_ESCAPE:

                pgquit()

                raise SystemExit

黑屏可能是因为更新屏幕的方法有问题。代码中的两行设置屏幕大小的代码重复了，并且最后一行调用的是 selfbg_color 而不是 selfsettingsbg_color，这也可能是导致黑屏的原因。请尝试更改代码：
import sys
import pygame
from settings import Settings
from ship import Ship
class AlienInvasion:
def __init__(self):
pygameinit()
selfsettings=Settings()
selfscreen=pygamedisplayset_mode((selfsettingsscreen_width, selfsettingsscreen_height))
pygamedisplayset_caption("Alien Invasion")
selfship=Ship(self)
def run_game(self):
while True:
self_check_events()
self_update_screen()
def _check_events(self):
for event in pygameeventget():
if eventtype == pygameQUIT:
sysexit()
elif eventtype == pygameKEYDOWN:
if eventkey == pygameK_RIGHT:
selfshiprectx+=1
def _update_screen(self):
selfscreenfill(selfsettingsbg_color)
selfshipblitme()
pygamedisplayflip()
if __name__ == '__main__':
ai = AlienInvasion()
airun_game()

要用Python画五一海报，需要用到Python的绘图库，比如matplotlib、Pillow等。以下是一个简单的例子，演示如何使用Python和Pillow库来制作五一海报：
from PIL import Image, ImageDraw, ImageFont
# 创建一个空白的画布，大小为800x600，背景色为白色
canvas = Imagenew('RGB', (800, 600), (255, 255, 255))
# 在画布上添加五一节日祝福语
font = ImageFonttruetype('arialttf', 48) # 设置字体样式和大小
draw = ImageDrawDraw(canvas)
drawtext((200, 100), '五一快乐！', fill=(0, 0, 0), font=font) # 设置文字位置、颜色和字体
# 在画布上添加五星红旗图案
flag = Imageopen('flagpng') # 读取五星红旗
flag = flagresize((200, 133)) # 设置大小为200x133
canvaspaste(flag, (300, 300)) # 将粘贴到画布上
# 保存并展示画布
canvassave('maydaypng')
canvasshow()
在这个例子中，我们首先使用Pillow库创建了一个800x600大小的空白画布，并在画布上添加了五一节日祝福语和五星红旗图案。最后使用save()方法将画布保存为PNG格式的，并使用show()方法展示。在实际 *** 作中，您需要根据自己的需求来修改代码，比如更换祝福语、调整字体大小和颜色、更换等。

---