使用matplotlib plt.show（）看不到图

Question

我是Python和Linux的新手，我需要帮助，我尝试使用matplotlib以下列方式显示简单的情节：

from matplotlib import pyplot as plt

plt.plot([5,6,7,8], [7,3,8,3])
plt.show()

但是，当我运行python3 test.py时，我得到以下输出：

/usr/local/lib/python3.4/dist-packages/matplotlib/backends/backend_gtk3agg.py:18: UserWarning: The Gtk3Agg backend is known to not work on Python 3.x with pycairo. Try installing cairocffi.
  "The Gtk3Agg backend is known to not work on Python 3.x with pycairo. "
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/matplotlib/backends/backend_gtk3agg.py", line 69, in on_draw_event
    buf, cairo.FORMAT_ARGB32, width, height)
NotImplementedError: Surface.create_for_data: Not Implemented yet.
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/matplotlib/backends/backend_gtk3agg.py", line 69, in on_draw_event
    buf, cairo.FORMAT_ARGB32, width, height)
NotImplementedError: Surface.create_for_data: Not Implemented yet.
/usr/local/lib/python3.4/dist-packages/matplotlib/backends/backend_gtk3.py:215: Warning: Source ID 7 was not found when attempting to remove it
  GLib.source_remove(self._idle_event_id)

和没有白色画布的空图：

有什么问题？我该如何解决？

Answer 1

如你所见：

"The Gtk3Agg backend is known to not work on Python 3.x with pycairo."

因此提出的 建议 是：

Try installing cairocffi.

cairocffi的{​​{3}}非常简单。如果满足依赖 ¹ ，则只需：

pip install cairocffi

^{1）Python 3.x 的依赖关系 逻辑上应为：}

sudo apt-get install python3-dev
sudo apt-get install libffi-dev