The story
pandas, numpy, seaborn, matplotlib are installed on the system without errors. I took this code example from http://seaborn.pydata.org/examples/many_pairwise_correlations.html
Snippet
from string import letters
import numpy as np
import pandas as pd
import seaborn as sns
import matplotlib.pyplot as plt
sns.set(style="white")
# Generate a large random dataset
rs = np.random.RandomState(33)
d = pd.DataFrame(data=rs.normal(size=(100, 26)),
columns=list(letters[:26]))
# Compute the correlation matrix
corr = d.corr()
# Generate a mask for the upper triangle
mask = np.zeros_like(corr, dtype=np.bool)
mask[np.triu_indices_from(mask)] = True
# Set up the matplotlib figure
f, ax = plt.subplots(figsize=(11, 9))
# Generate a custom diverging colormap
cmap = sns.diverging_palette(220, 10, as_cmap=True)
# Draw the heatmap with the mask and correct aspect ratio
sns.heatmap(corr, mask=mask, cmap=cmap, vmax=.3,
square=True, xticklabels=5, yticklabels=5,
linewidths=.5, cbar_kws={"shrink": .5}, ax=ax)
It results in the following error:
Traceback (most recent call last):
File "seaborn-example.py", line 4, in <module>
import seaborn as sns
File "/usr/local/lib/python2.7/site-packages/seaborn/__init__.py", line 6, in <module>
from .rcmod import *
File "/usr/local/lib/python2.7/site-packages/seaborn/rcmod.py", line 8, in <module>
from . import palettes, _orig_rc_params
File "/usr/local/lib/python2.7/site-packages/seaborn/palettes.py", line 12, in <module>
from .utils import desaturate, set_hls_values, get_color_cycle
File "/usr/local/lib/python2.7/site-packages/seaborn/utils.py", line 12, in <module>
import matplotlib.pyplot as plt
File "/usr/local/lib/python2.7/site-packages/matplotlib/pyplot.py", line 115, in <module>
_backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
File "/usr/local/lib/python2.7/site-packages/matplotlib/backends/__init__.py", line 32, in pylab_setup
globals(),locals(),[backend_name],0)
File "/usr/local/lib/python2.7/site-packages/matplotlib/backends/backend_tkagg.py", line 6, in <module>
from six.moves import tkinter as Tk
File "/usr/local/lib/python2.7/site-packages/six.py", line 203, in load_module
mod = mod._resolve()
File "/usr/local/lib/python2.7/site-packages/six.py", line 115, in _resolve
return _import_module(self.mod)
File "/usr/local/lib/python2.7/site-packages/six.py", line 82, in _import_module
__import__(name)
File "/usr/local/lib/python2.7/lib-tk/Tkinter.py", line 39, in <module>
import _tkinter # If this fails your Python may not be configured for Tk
ImportError: No module named _tkinter
Referred Install tkinter for Python for installing tkinter
yum install -y tkinter tk-devel
Then I followed this for rebuilding Python
https://github.com/h2oai/h2o-2/wiki/installing-python-2.7-on-centos-6.3.-follow-this-sequence-exactly-for-centos-machine-only
And got this when I tried the rebuilding - still some issue with tkinter:
Traceback (most recent call last):
File "seaborn-example.py", line 22, in <module>
f, ax = plt.subplots(figsize=(11, 9))
File "/usr/local/lib/python2.7/site-packages/matplotlib/pyplot.py", line 1203, in subplots
fig = figure(**fig_kw)
File "/usr/local/lib/python2.7/site-packages/matplotlib/pyplot.py", line 535, in figure
**kwargs)
File "/usr/local/lib/python2.7/site-packages/matplotlib/backends/backend_tkagg.py", line 81, in new_figure_manager
return new_figure_manager_given_figure(num, figure)
File "/usr/local/lib/python2.7/site-packages/matplotlib/backends/backend_tkagg.py", line 89, in new_figure_manager_given_figure
window = Tk.Tk()
File "/usr/local/lib/python2.7/lib-tk/Tkinter.py", line 1745, in __init__
self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)
_tkinter.TclError: no display name and no $DISPLAY environment variable
What is wrong here?
