import io
import matplotlib.pyplot as plt
from django.http import HttpResponse
from django.template import loader

# 生成图表
def generate_plot():
    # 绘制图表的代码
    plt.plot([1, 2, 3, 4])
    plt.ylabel('Some Numbers')
    plt.savefig('/path/to/plot.png')

# 将图像文件读取为二进制数据
def read_image_data():
    with open('/path/to/plot.png', 'rb') as f:
        return f.read()

# 构建HTTPResponse对象
def build_http_response():
    image_data = read_image_data()
    response = HttpResponse(content_type='image/png')
    response.write(image_data)
    return response

# 将HTTPResponse对象包含在模板中并显示在网页上
def display_plot(request):
    generate_plot()
    http_response = build_http_response()
    template = loader.get_template('plot_template.html')
    context = {'http_response': http_response}
    return HttpResponse(template.render(context, request))