python - tkinter.TclError : couldn't connect to display "localhost:18.0"

Question

我试图在中央服务器中运行模拟(用 python 编写)，模拟完成后，通过连接到我的本地 PC 将保存的图形文件/保存的数据文件移动到我的本地 PC。代码如下:

import matplotlib.pyplot as plt
import subprocess
import scipy.io
import os

#Save data file:
scipy.io.savemat(data_path + Filename_str, dict(A=board))

#Create / Save figure by using imshow (Heatmap)
p = plt.imshow(mean_map.T, cmap = plt.cm.gist_yarg_r, origin = 'lower',  extent = [0, phi, 0, Z], aspect='auto')
plt.savefig(figure_path + Filename_str + '-Homophily.pdf')

# Connect to my local host (arabian-knights) using ssh, and follow command.
ret = subprocess.call(['ssh', 'arabian-knights', 'mv Data/* /scratch/Data/'])
ret = subprocess.call(['ssh', 'arabian-knights', 'mv Figure/* /scratch/Figure/'])

从我的本地计算机(阿拉伯骑士)连接到服务器计算机后，我在服务器计算机的后台运行此模拟。即使我关闭了与服务器计算机的连接，因为模拟在后台运行，它不会停止，并且在模拟完成后数据文件会正确移动到我的本地计算机。但是，图形文件(由 matplotlib.pyplot.imshow 生成)没有保存，显示以下错误消息:

Traceback (most recent call last):
  File "./ThrHomoHeatmap-thrstep.py", line 179, in <module>
    p = plt.imshow(board.T, cmap = plt.cm.gist_yarg_r, vmin=0, vmax=n, origin = 'lower',  extent = [0, phi, 0, Z], aspect='auto')
  File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 2370, in imshow
    ax = gca()
  File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 701, in gca
    ax =  gcf().gca(**kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 369, in gcf
    return figure()
  File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 343, in figure
    **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_tkagg.py", line 80, in new_figure_manager
    window = Tk.Tk()
  File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1688, in __init__
    self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)
_tkinter.TclError: couldn't connect to display "localhost:18.0"

有没有人可以解决这个问题，将matplotlib.pyplot图形文件也从服务器移动到本地计算机？

Answer 1

问题是您正在使用一个交互式后端，它试图为您创建图形窗口，但由于您断开了启动模拟时可用的 x-server 的连接而失败。

将您的导入更改为

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