Question

我正在尝试在raspberry pi 3B中运行scikit-rf（https://scikit-rf-web.readthedocs.io/）提供的示例代码。我安装了所有必需的库，但我一直收到如下所示的错误。

Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/matplotlib-2.2.0-py3.5-linux-armv7l.egg/matplotlib/backends/backend_cairo.py", line 24, in <module>
    import cairocffi as cairo
ImportError: No module named 'cairocffi'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/matplotlib-2.2.0-py3.5-linux-armv7l.egg/matplotlib/backends/backend_cairo.py", line 27, in <module>
    import cairo
ImportError: No module named 'cairo'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/pi/Desktop/Backup/scikit-rf-master/skrf/plotting.py", line 40, in <module>
    import matplotlib.pyplot as plb
  File "/usr/local/lib/python3.5/dist-packages/matplotlib-2.2.0-py3.5-linux-armv7l.egg/matplotlib/pyplot.py", line 115, in <module>
    _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
  File "/usr/local/lib/python3.5/dist-packages/matplotlib-2.2.0-py3.5-linux-armv7l.egg/matplotlib/backends/__init__.py", line 62, in pylab_setup
    [backend_name], 0)
  File "/usr/local/lib/python3.5/dist-packages/matplotlib-2.2.0-py3.5-linux-armv7l.egg/matplotlib/backends/backend_gtk3agg.py", line 10, in <module>
    from .backend_cairo import cairo, HAS_CAIRO_CFFI
  File "/usr/local/lib/python3.5/dist-packages/matplotlib-2.2.0-py3.5-linux-armv7l.egg/matplotlib/backends/backend_cairo.py", line 29, in <module>
    raise ImportError("cairo backend requires that cairocffi or pycairo "
ImportError: cairo backend requires that cairocffi or pycairo is installed

我确实使用

安装了cairocffi

pip install cairocffi

输入pip freeze会显示cairocff，但这似乎没什么帮助。道歉，因为我对python很新。

Answer 1

您可能遇到不同Python版本的问题。仔细检查Python版本，看看pip是否安装在正确的位置。一旦我安装了Python 3和2，并且pip在Python 2上安装了所有内容。我必须使用pip3。

ImportError：没有名为＆＃39; cairocffi＆＃39;

1 个答案: