PIL不会第二次在图像上写入文本

Question

我正在尝试为一个不和谐的机器人制作一个有点雄心勃勃的刽子手游戏，为此我需要 PIL 以文本形式编写。在将一些文本写入图像后，然后尝试再次将文本写入同一图像，而不是发送添加了第二个文本的图像，它只发送带有第一个文本的图像。奇怪的是，函数通过，它将它保存为一个具有不同名称但没有文本的新文件（即第二组）。是什么赋予了？我在这里做错了什么？

import random, discord
from requests import get as reGet
from io import BytesIO
from PIL import Image, ImageDraw, ImageFont

# Just a random image I found off google, not actually using it
inp_shell = reGet("https://upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Circle_-_black_simple.svg/1200px-Circle_-_black_simple.svg.png")

# Yes, I know, probably not the best place to put the font, I'll change it later
fnt = ImageFont.truetype("modules/Roboto-Regular.ttf", size= 40)

# Opens a list of words that it can get from; The file here is just a stub
with open('words_alpha.txt') as words_file:
    word_list = words_file.read().splitlines()


class img():

    def __init__(self):
        self.open_shell = Image.open(BytesIO(inp_shell.content))

    # Text in the top left
    async def tLeft(self, txt, inp_img):
        image = ImageDraw.Draw(inp_img)
        image.text((10,10), txt, font=fnt, fill=(0, 0, 0))
        self.open_shell.save("tLeft.png")
    
    async def main_text(self, txt, inp_img):
        image = ImageDraw.Draw(inp_img)

        # Used to position the text in the center but currently is not being used
        x, y = inp_img.size 
        pos = x/2

        # I've tried changing the fill and position, and still nothing.
        # This is probably the source of the problem
        image.text((20,20), txt, font=fnt, fill=(255, 255, 255))
        print(txt)
        self.open_shell.save("mainText.png")


# Creates a dictionary with the length of the words assigned as they keys,
# I think anyways, I didn't write this
by_length = {}
for word in word_list:
    by_length.setdefault(len(word), []).append(word)

# Retrieves a random word with a certain length
async def word_finder(wordlength):
    global word
    word = random.choice(by_length[wordlength])
    print(word)
  
# Main function
async def hanggMan(message): #double g in hang is intentional

    content = message.clean_content[11:] 
    print(content) # Just used to make sure it's going through

    # For now I'm using a word length of 5
    if content.lower() == "5":
        z = img() # Calls an instance of the img class

        # Puts the image in an embed; ignore t his
        embed = discord.Embed(title="testtest                                 testtesttesttest") 
        embed.type = "rich"
        embed.colour = discord.Color.gold() 

        await word_finder(5) # Tells the word_finder function to find a random word with a length of 5
        await z.tLeft(txt="tLeft", inp_img= z.open_shell) # Calls the tLeft function and tells it to write "tLeft"

        # Calls the main_text function and tells it to write the word on top of
        # "tLeft.png". There is a print statement in the function and it actually
        # does print the word, so this is not likely to be the source of the problem
        await z.main_text(txt=word, inp_img=Image.open("tLeft.png")) 
        
        embed.set_image(url="attachment://mainText.png")

        # The interesting thing about this is that it actually does save it as "mainText.png"
        # and sends the file properly, but the word is nowhere to be found
        await message.channel.send(embed=embed, file=discord.File("mainText.png"))

Answer 1

我无法运行它，但是当我开始删除不重要的代码时，我看到您在 img() 类中以错误的方式使用图像。

你总是保存你在self.open_shell中的图像

在第一个函数中，您发送与参数相同的图像

 z.tLeft(txt="tLeft", inp_img=z.open_shell)

所以将文本添加到z.open_shell 并保存z.open_shell

但是在函数中你发送不同的图像作为参数

 z.main_text(txt=word, inp_img=Image.open("tLeft.png"))

因此您将文本添加到新图像但您再次保存 z.open_shell 具有旧版本。

你需要

    self.open_shell = inp_img

这样

def main_text(self, txt, inp_img):

    self.open_shell = inp_img

    image = ImageDraw.Draw(inp_img)
    image.text((20,20), txt, font=fnt, fill=(255, 255, 255))

    self.open_shell.save("mainText.png")