decisiontreeplot.py

from sklearn.externals.six import StringIO  
from sklearn.tree import export_graphviz
import pydotplus
from IPython.display import Image


dot_data = StringIO()  

export_graphviz(
    model, 
    out_file = dot_data,  
    filled=True, rounded=True, proportion=False,
    special_characters=True, 
    feature_names=X.columns,
    class_names=["cat", "dog"]
)  

graph = pydotplus.graph_from_dot_data(dot_data.getvalue())  

Image(graph.create_png())