图片64base转码与解码
场景一：图片转码成base64，传输，接收后解码成png等格式图片
import base64
# 读取图片，转换为base64编码格式
with open("F:\Archer\picture\yunyun.jpg", "rb") as f:
content = f.read()
base64_data = base64.b64encode(content) # 转换为base64编码
# 写入图片，将base64格式解码写入图片（存在覆盖，不存在创建）
with open("F:\Archer\picture\yunyun2.png", "wb") as file:
content = base64.b64decode(base64_data) # 将base64编码解码
file.write(content)场景二：图片转码成base64，加到邮件的Html里面，邮件的接受者直接可查看（解决问题：邮件里的图片地址为本地的，邮件接受者显示不出来）
import base64
with open("F:\Archer\picture\yunyun.jpg", "rb") as f:
# b64encode是编码，b64decode是解码
base64_data = base64.b64encode(f.read()) # 编码
# base64.b64decode(base64data)
base64_data_str = str(base64_data, encoding="utf-8")
html_str = "data:image/jpg;base64," + base64_data_str
print(base64_data_str)
htmlBody = f"""
<body>
<img src="{html_str}">
</body>
"""场景三：本地图片转换为base64格式编码，传递到前端展示
view部分：
import base64
from django.shortcuts import render
from django.core.paginator import Paginator
def images(request, pictureFile_list):
image_list = []
for file in pictureFile_list:
with open(file, "rb") as f:
base64_data = base64.b64encode(f.read())
base64_data_str = "data:image/jpg;base64," + str(base64_data, encoding="utf-8")
image_list.append(base64_data_str)
paginator = Paginator(image_list, 1) # 实例化Paginator, 每页显示1条数据
page = paginator.page(paginator.num_pages) # 传递当前页的实例对象到前端
# print(page.paginator, page.object_list)
content = {"page": page}
return render(request, 'images.html', content)template部分：
{% for img in page %}
<div>
<img src="{{ img }}" />
</div>
{% endfor %}
