Question

我正在尝试测试Matplotlib是否在Ubuntu上的PyQt中工作。我一直在使用PyQt，我想在Pyqt中嵌入Matplotlib。我按照http://eli.thegreenplace.net/2009/01/20/matplotlib-with-pyqt-guis/给出的代码进行了操作，但在导入matplotlib时会产生一些错误。

from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
  File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_qt4agg.py", line 9, in <module>
    from matplotlib.figure import Figure
  File "/usr/lib/pymodules/python2.6/matplotlib/figure.py", line 18, in <module>
    from axes import Axes, SubplotBase, subplot_class_factory
  File "/usr/lib/pymodules/python2.6/matplotlib/axes.py", line 2, in <module>
    import math, sys, warnings, datetime, new
  File "/home/kasa/Desktop/new.py", line 25, in <module>
    from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
ImportError: cannot import name FigureCanvasQTAgg

我从终端运行这些导入命令，它工作正常。有人可以弄清楚我的安装有什么问题。

Answer 1

阅读追溯。

您尝试从FigureCanvasQTAgg导入backend_qt4agg：

from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas

它尝试从Figure导入figure：

  File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_qt4agg.py", line 9, in <module>
    from matplotlib.figure import Figure

试图从axes导入几件事：

  File "/usr/lib/pymodules/python2.6/matplotlib/figure.py", line 18, in <module>
    from axes import Axes, SubplotBase, subplot_class_factory

它也导入了几个模块。注意最后一个，new：

  File "/usr/lib/pymodules/python2.6/matplotlib/axes.py", line 2, in <module>
    import math, sys, warnings, datetime, new

它在哪里寻找它？而不是内置模块，它转到

  File "/home/kasa/Desktop/new.py", line 25, in <module>

，我想这是你的档案，它又回来了：

    from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas

Python意识到它无法导入FigureCanvasQTAgg，因为它发现自己处于循环导入地狱，因此错误：

ImportError: cannot import name FigureCanvasQTAgg

长话短说

您的文件会屏蔽内置new module。解决方案很简单：重命名文件（并从文件夹中删除new.pyc）。

在PyQt中嵌入Matplotlib

1 个答案: