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Python turtle 图章在 turtle 形状的图像处理后神秘消失

转载 作者:太空狗 更新时间:2023-10-30 01:13:26 39 4
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方向:

我创建了以下函数以允许用户将 turtle 更改为他/她选择的图像,然后随时将其标记到 Canvas 上:

def TurtleShape():
try:
# Tkinter buttons related to turtle manipulation
manipulateimage.config(state = NORMAL)
flipButton.config(state = NORMAL)
mirrorButton.config(state = NORMAL)
originalButton.config(state = NORMAL)
resetturtle.config(state = NORMAL)
rotateButton.config(state = NORMAL)
# Ask user for file name from tkinter file dialog, and return file name as `klob`
global klob
klob = filedialog.askopenfilename()
global im
# Open `klob` and return as `im`
im = Image.open(klob)
# Append `im` to pictures deque
pictures.append(im)
# Clear `edited` deque
edited.clear()
# Save `im` as an image, then register image as shape, and finally set image as turtle shape
im.save(klob + '.gif', "GIF")
register_shape(klob + '.gif')
shape(klob + '.gif')
update()
except:
# If user selects cancel in file dialog, then pass
pass

def StampPic():
stamp()
draw_space() # Go forward 100 pixels with pen up after every stamp
update()

还可以通过以下其他功能根据用户的选择操作图像:

调整大小功能 – 此功能可以作为第一或次要功能。第一个意思是它最初被调用,第二个意思是它编辑一个已经编辑过的图像。因此,如果仅首先调用,此函数将获取附加到 pictures 的图像。 deque,调整大小,并将编辑后的图像输出为 .gif图像,这将是 turtle 的新形状。但是,如果连续调用两次或更多次,由于多次调整同一图片的大小会导致图像失真的问题,我不得不创建另一个双端队列 jiop它保存了 pictures 中的原始项目deque,每当此函数被连续调用一次以上时,每次都会调整原始图像的大小,而不是每次都调整相同的图像。但是,如果仅作为辅助函数调用,则该函数将简单地从 edited 中获取当前图像。 deque,调整该图像的大小,然后将其设置为 turtle 的新形状:
def TurtleImageResize():
if not hasattr(TurtleImageResize, "counter"):
TurtleImageResize.counter = 0
TurtleImageResize.counter += 1
# width = original size of image
width = im.size[0]
# height = original height of image
height = im.size[1]
# Allow user to enter new width for image
NewOne2 = numinput('Width of Image', 'Set the width of the image: ', minval = 1)
# Allow user to enter new height for image
NewOne = numinput('Height of Image', 'Set the height of your image: ', minval = 1)
# Set width to user input if user input is NOT nothing. Otherwise, use `width` as picture width.
Picwidth = NewOne2 if NewOne2 != None else width
# Set height to user input if user input is NOT None. Otherwise, use `height` as picture height.
Picheight = NewOne if NewOne != None else height
try:
# Secondary Step: Take ORIGINAL image appended to `jiop` (from `except:` code block succeeding `try:` code block) and resize THAT image each time this function is called twice in a row. Otherwise, if ONLY called as a secondary step, take previously edited image from `edited` deque, resize that, and append newly edited image to the `edited` deque.
try:
# `jiop` is a deque
hye = jiop.pop()
jiop.append(hye)
print("Jiop")
except:
hye = edited.pop()
jiop.append(hye)
print("Edited")
# Resize Image to Picwidth and Picheight
editpic = hye.resize((int(Picwidth), int(Picheight)), Image.ANTIALIAS)
edited.append(editpic)
print("Hooplah!")
except:
# Intial step: Take image appended to `pictures` deque from `TurtleShape` function, then edit that and append newly edited image to both `editpic` and `pictures`
geer = pictures.pop()
# Resize Image to Picwidth and Picheight
editpic = geer.resize((int(Picwidth), int(Picheight)), Image.ANTIALIAS)
jiop.append(geer)
edited.append(editpic)
pictures.append(editpic)
print("Normal")
# Save image as `.gif`
editpic.save(klob + str(TurtleImageResize.counter) + '.gif', 'GIF')
# Register image as a shape, and use it as shape of turtle
register_shape(klob + str(TurtleImageResize.counter) + '.gif')
shape(klob + str(TurtleImageResize.counter) + '.gif')
update()

翻转、旋转和镜像功能 - 这些工作比上面的调整大小功能更简单。如果最初被调用,他们每个人都会从 pictures 中获取图像。 deque,操作它,将编辑后的图像附加到 edited deque,然后将 turtle “形状”更改为该新图像。但是,如果调用第二个,他们每个人都会从 edited 中获取图像。 deque,操纵它,将操纵的图像重新附加回 edited deque,然后将其设置为 turtle 的新“形状”。这些功能如下所示:
def flippic():
if not hasattr(flippic, "counter"):
flippic.counter = 0
flippic.counter += 1
try:
# Secondary step: Take previously edited image from `edited` deque, manipulate that, and append newly edited image to the `edited` deque
jiop.clear()
ghy = edited.pop()
# Flip image over horizontal line
kpl = ImageOps.flip(ghy)
edited.append(kpl)
print("Jlop")
except:
# Initial step: Take image appended to `pictures` deque from `TurtleShape` function, then edit that and append newly edited image to both `editpic` and `pictures`
neer = pictures.pop()
# Flip image over horizontal line
kpl = ImageOps.flip(neer)
pictures.append(kpl)
edited.append(kpl)
print("Yup")
# Save image as `.gif`
kpl.save(klob + str(flippic.counter) + '.gif', "GIF")
# Register image as a shape, and use it as shape of turtle
register_shape(klob + str(flippic.counter) + '.gif')
shape(klob + str(flippic.counter) + '.gif')
update()

def mirror():
if not hasattr(mirror, "counter"):
mirror.counter = 0
mirror.counter += 1
try:
jiop.clear()
jui = edited.pop()
# Flip image over vertical line
fgrt = ImageOps.mirror(jui)
edited.append(fgrt)
except:
bbc = pictures.pop()
# Flip image over vertical line
fgrt = ImageOps.mirror(bbc)
pictures.append(fgrt)
edited.append(fgrt)
fgrt.save(klob + str(mirror.counter) + ".gif")
register_shape(klob + str(mirror.counter) + ".gif")
shape(klob + str(mirror.counter) + ".gif")
update()

def rotatePic():
if not hasattr(rotatePic, "counter"):
rotatePic.counter = 0
rotatePic.counter += 1
try:
jiop.clear()
lmcb = edited.pop()
# Rotate image 90º right
fetch = lmcb.rotate(-90, expand = True)
edited.append(fetch)
except:
bolt = pictures.pop()
# Rotate image 90º right
fetch = bolt.rotate(-90, expand = True)
pictures.append(fetch)
edited.append(fetch)
fetch.save(klob + str(rotatePic.counter) + ".gif")
register_shape(klob + str(rotatePic.counter) + ".gif")
shape(klob + str(rotatePic.counter) + ".gif")
update()

这样,所有的编辑功能都可以在本质上相同的基本图像上协同工作。

问题:

现在,考虑用户想要获取 turtle 图像,然后将其调整为大小,例如 800x400,并将其标记到 Canvas 上的特定位置。之后,用户决定将 turtle 图像移动到 Canvas 上的另一个位置,翻转图像,然后在那里标记图像。现在应该有两个图像吧​​?一个盖章,另一个翻转?但是,在我的程序中,出于某种原因, 事实并非如此 .相反,盖章图像 消失 用户翻转 turtle 图像的那一刻,即使没有 clear()任何地方都可以找到的函数(为了向您展示我的意思,请参阅下面的 编辑 )。 显然这个问题只发生在 TurtleImageResize 之后函数被调用。

我的 TurtleImageResize 出了什么问题导致此问题的功能? 我已经将 turtle 形状的图像管理过程完全修改为现在的样子,希望它能解决我在之前的设置中也遇到的这个问题,但显然,情况仍然并非如此。因此,非常感谢对此问题的任何帮助!

编辑:下面是一个 最小、完整且可验证 重现我遇到的问题的方法 (必须安装 PIL(或 Pillow)和 GhostScript 才能使其正常工作) :
import os,shutil,subprocess, sys
her = sys.platform
if her == "win32":
print("Windows is your Operating System")
win_gs = ["gs","gswin32c","gswin64c"]
if all( shutil.which(gs_version) is None for gs_version in win_gs ):
paths = ["C:\\Program Files\\gs\\gs9.18\\bin","C:\\Program Files (x86)\\gs\\gs9.18\\bin"]
for path in (x for x in paths if os.path.exists(x)):
os.environ["PATH"] += ";" + path
break
if any( shutil.which(gs_version) for gs_version in win_gs ):
print("GhostScript 9.18 for Windows found and utilized")
else:
print("You do not have GhostScript 9.18 installed for Windows. Please install it.")
sys.exit(0)
else:
print("GhostScript 9.18 for Windows found and utilized")
elif her == 'darwin':
print("Macintosh is your Operating System")
if shutil.which("gs") is None:
os.environ["PATH"] += ":/usr/local/bin"
if shutil.which("gs") is None:
print("You do not have GhostScript installed for Macintosh. Please install it.")
sys.exit(0)
else:
print("GhostScript for Macintosh found and utilized")

from turtle import *
from tkinter import *
try:
import tkinter.filedialog as filedialog
except ImportError:
pass
import collections
from PIL import Image, ImageEnhance, ImageOps


jiop = collections.deque()
pictures = collections.deque()
edited = collections.deque()
picwidth = collections.deque()
picheight = collections.deque()

def draw_space():
# Draw a space 200 pixels wide.
penup()
forward(200)
pendown()

def TurtleShape():
try:
manipulateimage.config(state = NORMAL)
flipButton.config(state = NORMAL)
mirrorButton.config(state = NORMAL)
rotateButton.config(state = NORMAL)
global klob
klob = filedialog.askopenfilename()
global im
im = Image.open(klob)
pictures.append(im)
edited.clear()
im.save(klob + '.gif', "GIF")
register_shape(klob + '.gif')
shape(klob + '.gif')
update()
except AttributeError:
pass

def TurtleImageResize():
if not hasattr(TurtleImageResize, "counter"):
TurtleImageResize.counter = 0
TurtleImageResize.counter += 1
width = im.size[0]
height = im.size[1]
NewOne2 = numinput('Width of Image', 'Set the width of the image: ', minval = 1)
NewOne = numinput('Height of Image', 'Set the height of your image: ', minval = 1)
Picwidth = NewOne2 if NewOne2 != None else width
picwidth.append(Picwidth)
Picheight = NewOne if NewOne != None else height
picheight.append(Picheight)
try:
try:
hye = jiop.pop()
jiop.append(hye)
except:
hye = edited.pop()
jiop.append(hye)
editpic = hye.resize((int(Picwidth), int(Picheight)), Image.ANTIALIAS)
edited.append(editpic)
pictures.append(editpic)
except:
geer = pictures.pop()
editpic = geer.resize((int(Picwidth), int(Picheight)), Image.ANTIALIAS)
jiop.append(geer)
edited.append(editpic)
pictures.append(editpic)
editpic.save(klob + str(TurtleImageResize.counter) + '.gif', 'GIF')
register_shape(klob + str(TurtleImageResize.counter) + '.gif')
shape(klob + str(TurtleImageResize.counter) + '.gif')
update()

def flippic():
if not hasattr(flippic, "counter"):
flippic.counter = 0
flippic.counter += 1
try:
jiop.clear()
ghy = edited.pop()
kpl = ImageOps.flip(ghy)
edited.append(kpl)
pictures.append(kpl)
print("Jlop")
except:
neer = pictures.pop()
kpl = ImageOps.flip(neer)
pictures.append(kpl)
edited.append(kpl)
print("Yup")
kpl.save(klob + str(flippic.counter) + '.gif', "GIF")
register_shape(klob + str(flippic.counter) + '.gif')
shape(klob + str(flippic.counter) + '.gif')
update()

def mirror():
if not hasattr(mirror, "counter"):
mirror.counter = 0
mirror.counter += 1
try:
jiop.clear()
jui = edited.pop()
fgrt = ImageOps.mirror(jui)
edited.append(fgrt)
pictures.append(fgrt)
except:
bbc = pictures.pop()
fgrt = ImageOps.mirror(bbc)
pictures.append(fgrt)
edited.append(fgrt)
fgrt.save(klob + str(mirror.counter) + ".gif")
register_shape(klob + str(mirror.counter) + ".gif")
shape(klob + str(mirror.counter) + ".gif")
update()

def rotatePic():
if not hasattr(rotatePic, "counter"):
rotatePic.counter = 0
rotatePic.counter += 1
try:
jiop.clear()
lmcb = edited.pop()
fetch = lmcb.rotate(-90, expand = True)
edited.append(fetch)
pictures.append(fetch)
except:
bolt = pictures.pop()
fetch = bolt.rotate(-90, expand = True)
pictures.append(fetch)
edited.append(fetch)
fetch.save(klob + str(rotatePic.counter) + ".gif")
register_shape(klob + str(rotatePic.counter) + ".gif")
shape(klob + str(rotatePic.counter) + ".gif")
update()

def StampPic():
stamp()
draw_space()
update()

def move_turtle():
# Pick up the turtle and move it to its starting location.
penup()
goto(-200, 100)
pendown()

def settings():
# Tkinter buttons
turtlepic = Button(text = "Set Turtle Image", command = TurtleShape)
turtlepic.pack(side = 'left')

stampimage = Button(text = "Stamp", command = StampPic)
stampimage.pack(side = 'left')

global manipulateimage
manipulateimage = Button(text = "Resize Turtle Image", command = TurtleImageResize, state = DISABLED)
manipulateimage.pack(side = 'left')

global flipButton
flipButton = Button(text = "Flip image", command = flippic, state = DISABLED)
flipButton.pack(side = 'left')

global mirrorButton
mirrorButton = Button(text = "Mirror Image", command = mirror, state = DISABLED)
mirrorButton.pack(side = 'left')

global rotateButton
rotateButton = Button(text = "Rotate Image", command = rotatePic, state = DISABLED)
rotateButton.pack(side = 'left')

def skip(x, y):
penup()
goto(x, y)
pendown()
update()

move_turtle()
settings()
speed(0)
tracer(0, 0)
onscreenclick(skip)

if sys.platform == 'win32':
input()
else:
pass

当/如果您同时拥有 GhostScript和 PIL(或 Pillow)安装在您的系统上,要重现我的问题,请执行以下操作(所有步骤 需要 除第 4 步外):
  • 点击 Set Turtle Image窗口底部的按钮,选择您想要 turtle 的任何图像,然后按 Open . turtle 被设置为该图像。
  • Resize turtle Image 将图像调整为 800x400(或您想要的任何其他尺寸)屏幕底部的按钮。将连续弹出两个对话框。在第一个对话框中输入800的宽度(或您自己的宽度),然后在第二个对话框中输入400的高度(或您自己的高度),完成后,图像将根据提供的尺寸改变大小(或根据您是否按下取消将图像设置回原始尺寸)。
  • 选择 Stamp窗口底部的按钮。图像被标记到 Canvas 上, turtle 在标记图像“后面”向前移动 400 像素。
  • 可选:单击 Canvas 上的任意位置将 turtle 带到该位置。
  • 翻转/镜像/旋转图像。

  • 正如您所看到的,在完成所有这些操作后,就像您翻转/镜像/旋转图像一样,被标记的图像就会消失。 我的 TurtleImageResize 出了什么问题导致这种情况发生的功能?

    编辑#2:以防万一这些信息有用,我正在 Macintosh 上运行 Python 3.5.1,操作系统版本为 10.11.2 (El Capitan)。

    最佳答案

    问题似乎在于,通过为不同功能设置单独的计数器,您会覆盖先前操作创建的文件。假设您有一张名为 test.gif 的图片并应用翻转变换。结果将保存为 test.gif1.gif .如果您现在应用旋转变换,旋转后的图片也会保存为 test.gif1.gif ,覆盖现有文件,之前的图片消失。

    因此,修复此错误的一种方法是对所有图片使用一个计数器,而不是每个功能一个计数器,例如使用 itertools.count或者只是一个 int .这也会使您的代码更短一些。

    但是,还有几个问题我想指出:

  • 你有相当多的代码重复,特别是在你不同的转换函数中;您可以重构它们以将实际转换作为函数参数
  • 不要做except:一样多,少得多except: pass ;这样你就永远不会知道发生了什么,以防万一出现问题
  • 此外,恕我直言,异常应该仅用于异常行为,而您将它们用于正常行为,例如当列表仍然为空时
  • 我真的不明白所有这些有什么不同 queue s 是为了;如果您将所有图片放入一个队列,或者根本没有队列(只需将它们保存在磁盘上),代码也能正常工作;但也许你需要那些不属于你的示例代码的东西

  • 这是我的代码版本:
    import turtle
    import tkinter
    import tkinter.filedialog as filedialog
    import itertools
    from PIL import Image, ImageEnhance, ImageOps

    count = itertools.count()
    img = None

    def turtleShape():
    global img
    klob = filedialog.askopenfilename()
    img = Image.open(klob)
    saveAndUpdate(img)

    def turtleImageResize():
    def resize(img):
    picwidth = turtle.numinput('Width of Image', 'Set the width of the image: ', minval=1) or img.size[0]
    picheight = turtle.numinput('Height of Image', 'Set the height of your image: ', minval=1) or img.size[1]
    return img.resize((int(picwidth), int(picheight)), Image.ANTIALIAS)
    manipulate(resize)

    def manipulate(function):
    global img
    if img:
    img = function(img)
    saveAndUpdate(img)
    else:
    print("No picture selected")

    def flippic():
    manipulate(ImageOps.flip)

    def mirror():
    manipulate(ImageOps.mirror)

    def rotatePic():
    manipulate(lambda img: img.rotate(-90, expand=True))

    def saveAndUpdate(img):
    name = "pic_" + str(next(count)) + ".gif"
    img.save(name, 'GIF')
    turtle.register_shape(name)
    turtle.shape(name)
    turtle.update()

    def stampPic():
    turtle.stamp()
    turtle.penup()
    turtle.forward(200)
    turtle.pendown()

    def settings():
    tkinter.Button(text="Set Turtle Image", command=turtleShape).pack(side='left')
    tkinter.Button(text="Stamp", command=stampPic).pack(side = 'left')
    tkinter.Button(text="Resize Turtle Image", command=turtleImageResize).pack(side='left')
    tkinter.Button(text="Flip image", command=flippic).pack(side='left')
    tkinter.Button(text="Mirror Image", command=mirror).pack(side='left')
    tkinter.Button(text="Rotate Image", command=rotatePic).pack(side='left')

    def skip(x, y):
    turtle.penup()
    turtle.goto(x, y)
    turtle.pendown()
    turtle.update()

    skip(-200, 100)
    settings()
    turtle.speed(0)
    turtle.tracer(0, 0)
    turtle.onscreenclick(skip)
    turtle.mainloop()

    关于Python turtle 图章在 turtle 形状的图像处理后神秘消失,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34959507/

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