我正在尝试使用 matplotlib 和 mpld3 在我的 Django 报告应用程序上生成一些 html 图。
基本上我有一个如下图的 Controller :
from django.shortcuts import render
import mpld3
from matplotlib.pyplot import figure, title, bar
def cpfLogin(request):
mpl_figure = figure(1)
xvalues = (1,2,3,4,5)
yvalues = (1,2,3,4,5)
width = 0.5 # the width of the bars
title(u'Custom Bar Chart')
bar(xvalues, yvalues, width)
fig_html = mpld3.fig_to_html(mpl_figure)
context = {
'figure': fig_html,
}
return render(request, 'reports/CPFReport.html', context)
reports/CPFReport.html 的代码是:
{% load i18n %}
{% block extrahead %}
<style type="text/css">
.chart_title {
font-weight: bold;
font-size: 14px;
}
</style>
{% endblock %}
{% block content %}
<div id="content-main">
<div class="chart_title">
{% trans "Custom Bar Chart" %}
</div>
{{ figure|safe }}
</div>
{% endblock %}
代码正确执行并且绘图正确显示,但几秒钟后应用程序终止并出现以下错误:
Assertion failed: (NSViewIsCurrentlyBuildingLayerTreeForDisplay() != currentlyBuildingLayerTree), function NSViewSetCurrentlyBuildingLayerTreeForDisplay, file /BuildRoot/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit-1561.20.106/AppKit.subproj/NSView.m, line 14480.
我发现,如果我注释所有代码,则在调用任何 matplotlib 库时都会抛出此异常。
有人对此问题有解决方法或解决方案吗?
请您参考如下方法:
在我的例子中,我不得不避免导入:
import matplotlib.pyplot as plt
fig,ax = plt.subplots(figsize=(8,9))
l = plt.plot(x,s, 'y-', label="line")
并将其替换为:
from matplotlib.figure import Figure
fig = Figure()
ax = fig.add_subplot(111))
l = ax.plot(x,s, 'y-', label="line")
