在Django中输出matplotlib生成的图片方法

from django.shortcuts import renderfrom django.http import HttpResponsefrom matplotlib.figure import Figure      from matplotlib.backends.backend_agg import FigureCanvasAggfrom matplotlib.dates import DateFormatterimport matplotlib.pyplot as pltimport randomimport datetime# Create your views here.def gen_mat(request): fig=Figure(figsize=(6,6)) ax=fig.add_subplot(111) x=[] y=[] now=datetime.datetime.now() delta=datetime.timedelta(days=1) for i in range(10):  x.append(now)  now+=delta  y.append(random.randint(0, 1000)) ax.plot_date(x, y, '-') ax.xaxis.set_major_formatter(DateFormatter('%Y-%m-%d')) fig.autofmt_xdate() canvas=FigureCanvasAgg(fig) response=HttpResponse(content_type='image/png') canvas.print_png(response) plt.close(fig) return response