Final Project : WordCloud | Crash Course on Python | Coursera

Programming Assignment: Crash Course on Python: Final Project: WordCloud

1. Week 6 | 

1. Crash Course on Python 

     Passed · 1/1 points

Video Explanation : https://youtu.be/x96qD6goQtU

For this project, you'll create a "word cloud" from a text by writing a script. This script needs to process the text, remove punctuation, ignore case and words that do not contain all alphabets, count the frequencies, and ignore uninteresting or irrelevant words. A dictionary is the output of the calculate_frequencies function. The wordcloud module will then generate the image from your dictionary.

For the input text of your script, you will need to provide a file that contains text only. For the text itself, you can copy and paste the contents of a website you like. Or you can use a site like Project Gutenberg to find books that are available online. You could see what word clouds you can get from famous books, like a Shakespeare play or a novel by Jane Austen. Save this as a .txt file somewhere on your computer.

Now you will need to upload your input file here so that your script will be able to process it. To do the upload, you will need an uploader widget. Run the following cell to perform all the installs and imports for your word cloud script and uploader widget. It may take a minute for all of this to run and there will be a lot of output messages. But, be patient. Once you get the following final line of output, the code is done executing. Then you can continue on with the rest of the instructions for this notebook.

Enabling notebook extension fileupload/extension...
- Validating: OK

# Final Project - Word Cloud

# Here are all the installs and imports you will need for your word cloud script and uploader widget

!pip install wordcloud

!pip install fileupload

!pip install ipywidgets

!jupyter nbextension install --py --user fileupload

!jupyter nbextension enable --py fileupload

import wordcloud

import numpy as np

from matplotlib import pyplot as plt

from IPython.display import display

import fileupload

import io

import sys

# This is the uploader widget

def _upload():

    _upload_widget = fileupload.FileUploadWidget()

    def _cb(change):

        global file_contents

        decoded = io.StringIO(change['owner'].data.decode('utf-8'))

        filename = change['owner'].filename

        print('Uploaded `{}` ({:.2f} kB)'.format(

            filename, len(decoded.read()) / 2 **10))

        file_contents = decoded.getvalue()

    _upload_widget.observe(_cb, names='data')

    display(_upload_widget)

_upload()

def calculate_frequencies(file_contents):

    # Here is a list of punctuations and uninteresting words you can use to process your text

    punctuations = '''!()-[]{};:'"\,<>./?@#$%^&*_~'''

    uninteresting_words = ["the", "a", "to", "if", "is", "it", "of", "and", "or", "an", "as", "i", "me", "my", \

    "we", "our", "ours", "you", "your", "yours", "he", "she", "him", "his", "her", "hers", "its", "they", "them", \

    "their", "what", "which", "who", "whom", "this", "that", "am", "are", "was", "were", "be", "been", "being", \

    "have", "has", "had", "do", "does", "did", "but", "at", "by", "with", "from", "here", "when", "where", "how", \

    "all", "any", "both", "each", "few", "more", "some", "such", "no", "nor", "too", "very", "can", "will", "just"]

    

    # LEARNER CODE START HERE

    required_dictionary ={} 

    dictonary_list=[]

    for words in file_contents.split():

        if words.isalpha() and words.lower() not in uninteresting_words:

            dictonary_list.append(words.lower())

    for words in dictonary_list:

        if words not in required_dictionary:

            required_dictionary[words] =1

        required_dictionary[words]+=file_contents.split().count(words)

    #print(required_dictionary)

    #wordcloud

    cloud = wordcloud.WordCloud()

    cloud.generate_from_frequencies(required_dictionary)

    return cloud.to_array()

# Display your wordcloud image

myimage = calculate_frequencies(file_contents)

plt.imshow(myimage, interpolation = 'nearest')

plt.axis('off')

plt.show()

If your word cloud image did not appear, go back and rework your calculate_frequencies function until you get the desired output. Definitely check that you passed your frequecy count dictionary into the generate_from_frequencies function of wordcloud. Once you have correctly displayed your word cloud image, you are all done with this project. Nice work!