Traceback (most recent call last):


 "print_html.py", line 2, in <module>

from prompt_toolkit import print_formatted_text, HTML
ImportError: cannot import name 'print_formatted_text'

Traceback (most recent call last):


 "<stdin>", line 1, in <module>


 "/usr/local/lib/python2.7/dist-packages/matplotlib/backends/backend_gtkagg.py", line 14, in <module>

from matplotlib.backends.backend_gtk import gtk, FigureManagerGTK, FigureCanvasGTK,\


 "/usr/local/lib/python2.7/dist-packages/matplotlib/backends/backend_gtk.py", line 36, in <module>

from matplotlib.backends.backend_gdk import RendererGDK, FigureCanvasGDK


 "/usr/local/lib/python2.7/dist-packages/matplotlib/backends/backend_gdk.py", line 33, in <module>

from matplotlib.backends._backend_gdk import pixbuf_get_pixels_array
ImportError: No module named _backend_gdk
