How do you create NLTK draw () trees that are built into iPython / Jupyter

Question

For Matplotlib plots in iPython / Jupyter, you can make laptop plot plots embedded with

%matplotlib inline 

How can I do the same for drawing NLTK () for trees? Here is the documentation http://www.nltk.org/api/nltk.draw.html

Answer 1

Based on this answer:

 import os from IPython.display import Image, display from nltk.draw import TreeWidget from nltk.draw.util import CanvasFrame def jupyter_draw_nltk_tree(tree): cf = CanvasFrame() tc = TreeWidget(cf.canvas(), tree) tc['node_font'] = 'arial 13 bold' tc['leaf_font'] = 'arial 14' tc['node_color'] = '#005990' tc['leaf_color'] = '#3F8F57' tc['line_color'] = '#175252' cf.add_widget(tc, 10, 10) cf.print_to_file('tmp_tree_output.ps') cf.destroy() os.system('convert tmp_tree_output.ps tmp_tree_output.png') display(Image(filename='tmp_tree_output.png')) os.system('rm tmp_tree_output.ps tmp_tree_output.png') 

A little slow but doing the job. If you do this remotely, remember to start the ssh session with the -X key (for example, ssh -X [e-mail] ) so that Tk can initialize itself ( no display name and no $DISPLAY environment variable -kind of error)

UPD : it seems that the latest versions of jupyter and nltk work well together, so you can just do IPython.core.display.display(tree) to get an attractive tree-like rendering built into the output.

Answer 2

2019 Update:

This works on a Jupyter laptop:

 from nltk.tree import Tree from IPython.display import display tree = Tree.fromstring('(S (NP this tree) (VP (V is) (AdjP pretty)))') IPython.core.display.display(tree) 

Requirements:

• NLTK
• Ghostscript

Answer 3

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