python base64将编码图像解码为PIL并将其另存为png

您好，我想解码一个Base64字符串，这是一个我用我编码的方式编码的图像，我将其转换为位图，然后对位图进行编码，现在我正在try 用Python对其进行解码，这就是我所做的.我有一个包含Base64数据的hash.txt文件，我复制该文件，将其放在变量定义中，它起作用了，然后我try f.read()，但失败了，这是代码

import base64
from PIL import Image
from io import BytesIO

def decode_base64_to_bitmap_and_save(base64_string, output_file_path):
    try:
        # Decode the base64 string to bytes
        decoded_bytes = base64.b64decode(base64_string)

        # Create a BytesIO stream from the decoded bytes
        byte_stream = BytesIO(decoded_bytes)

        # Open the image using Pillow (PIL)
        decoded_bitmap = Image.open(byte_stream)

        # Save the decoded bitmap as a PNG file
        decoded_bitmap.save(output_file_path, "PNG")

        return True  # Successful save
    except Exception as e:
        print(f"Error: {e}")
        return False  # Saving failed

# Example usage:
file_path = "hash.txt"
with open(file_path, "r") as file:

    base64_string = file.read()

output_file_path = "output.png"

if decode_base64_to_bitmap_and_save(base64_string, output_file_path):
    print(f"Image saved as {output_file_path}")
else:
    print("Failed to decode and save the image.")

我try 了f.read我try 了f.read的+"=="以添加填充我try 用""删除\n所以我从Base64中删除了所有\n

这是编码文件

import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Base64;

Bitmap imageBitmap = (Bitmap) extras.get("data");
String encodedString = bitMapToBase64(imageBitmap);
AfterPictureBase64(encodedString);

this是Base64文件