Using custom colors

Using the recolor method and custom coloring functions.

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import numpy as np
from PIL import Image
from os import path
import matplotlib.pyplot as plt
import os
import random

from wordcloud import WordCloud, STOPWORDS


def grey_color_func(word, font_size, position, orientation, random_state=None,
                    **kwargs):
    return "hsl(0, 0%%, %d%%)" % random.randint(60, 100)


# get data directory (using getcwd() is needed to support running example in generated IPython notebook)
d = path.dirname(__file__) if "__file__" in locals() else os.getcwd()

# read the mask image taken from
# http://www.stencilry.org/stencils/movies/star%20wars/storm-trooper.gif
mask = np.array(Image.open(path.join(d, "stormtrooper_mask.png")))

# movie script of "a new hope"
# http://www.imsdb.com/scripts/Star-Wars-A-New-Hope.html
# May the lawyers deem this fair use.
text = open(path.join(d, 'a_new_hope.txt')).read()

# pre-processing the text a little bit
text = text.replace("HAN", "Han")
text = text.replace("LUKE'S", "Luke")

# adding movie script specific stopwords
stopwords = set(STOPWORDS)
stopwords.add("int")
stopwords.add("ext")

wc = WordCloud(max_words=1000, mask=mask, stopwords=stopwords, margin=10,
               random_state=1).generate(text)
# store default colored image
default_colors = wc.to_array()
plt.title("Custom colors")
plt.imshow(wc.recolor(color_func=grey_color_func, random_state=3),
           interpolation="bilinear")
wc.to_file("a_new_hope.png")
plt.axis("off")
plt.figure()
plt.title("Default colors")
plt.imshow(default_colors, interpolation="bilinear")
plt.axis("off")
plt.show()