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我正在尝试将 matplotlib 与 Pycharm Community Ed 一起使用。2019.3，Python 3.7.3，Ubuntu 19.04。

import matplotlib
import matplotlib.pyplot as plt

plt.figure()
plt.plot(3,2,'.')
plt.show()

但是得到如下错误代码：UserWarning: Matplotlib is current using agg，这是一个非GUI后端，所以无法显示图形。”

我尝试将后端更改为“NbAgg”：

import matplotlib
matplotlib.use('NbAgg')
import matplotlib.pyplot as plt

plt.figure()
plt.plot(3,2,'.')
plt.show()

但是得到以下错误代码：

 Traceback (most recent call last):
  File "/home/leo/.PyCharmCE2019.3/config/scratches/scratch_1.py", line 7, in <module>
    plt.show()
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/matplotlib/pyplot.py", line 269, in show
    return _show(*args, **kw)
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/matplotlib/backends/backend_nbagg.py", line 261, in show
    manager.show()
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/matplotlib/backends/backend_nbagg.py", line 90, in show
    self._create_comm()
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/matplotlib/backends/backend_nbagg.py", line 122, in _create_comm
    self.add_web_socket(comm)
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/matplotlib/backends/backend_webagg_core.py", line 432, in add_web_socket
    self.resize(w, h)
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/matplotlib/backends/backend_webagg_core.py", line 418, in resize
    size=(w / self.canvas._dpi_ratio, h / self.canvas._dpi_ratio))
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/matplotlib/backends/backend_webagg_core.py", line 489, in _send_event
    s.send_json(payload)
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/matplotlib/backends/backend_nbagg.py", line 199, in send_json
    self.comm.send({'data': json.dumps(content)})
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/ipykernel/comm/comm.py", line 123, in send
    data=data, metadata=metadata, buffers=buffers,
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/ipykernel/comm/comm.py", line 66, in _publish_msg
    self.kernel.session.send(self.kernel.iopub_socket, msg_type,
AttributeError: 'NoneType' object has no attribute 'session'
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/matplotlib/_pylab_helpers.py", line 73, in destroy_all
    manager.destroy()
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/matplotlib/backends/backend_nbagg.py", line 126, in destroy
    self._send_event('close')
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/matplotlib/backends/backend_webagg_core.py", line 489, in _send_event
    s.send_json(payload)
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/matplotlib/backends/backend_nbagg.py", line 199, in send_json
    self.comm.send({'data': json.dumps(content)})
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/ipykernel/comm/comm.py", line 123, in send
    data=data, metadata=metadata, buffers=buffers,
  File "/home/leo/PycharmProjects/Coursera/venv/lib/python3.7/site-packages/ipykernel/comm/comm.py", line 66, in _publish_msg
    self.kernel.session.send(self.kernel.iopub_socket, msg_type,
AttributeError: 'NoneType' object has no attribute 'session'

我知道后端和显示图不兼容，但我不明白我需要做什么来匹配后端和显示图。

4

1 回答 1

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我能够将后端更改为“TkAgg”，但我必须使用以下命令通过命令行安装 tk：

sudo apt-get install python3-tk

但是，仍然需要使用 plt.show() 来弹出图形

于 2020-01-14T02:52:33.130 回答