PIL不会第二次在图像上写入文本

Question

我正在尝试为 discord 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。 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，function经过，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 class img()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 function 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 function 中，您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，但再次保存具有旧版本的z.open_shell 。

你需要

    self.open_shell = inp_img

像这样

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")