字云。代码没有显示错误，但显示wordcloud会引起名称错误。

这里是所有的安装和导入。

!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

这是上传器小工具。

from IPython.display import display
import fileupload

uploader = fileupload.FileUploadWidget()

def _handle_upload(change):
    w = change['owner']
    with open(w.filename, 'wb') as f:
        f.write(w.data)
    print('Uploaded `{}` ({:.2f} kB)'.format(
        w.filename, len(w.data) / 2**10))

uploader.observe(_handle_upload, names='data')

display(uploader)

Wordcloud程序。

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
    non_punctuation_text=""
    for char in file_contents:
        if char not in punctuations:
            non_punctuation_text=non_punctuation_text+char
    words=non_punctuation_text.split()
    clean_words=[]
    frequencies={}

    for word in words:
        if word.isalpha():
            if word not in uninteresting_words:
                clean_words.append(word)
    for alpha_word in clean_words:
        if alpha_word not in frequencies:
            frequencies[alpha_word]=1
        else:
            frequencies[alpha_word]+=1
    #wordcloud
    cloud = wordcloud.WordCloud()
    cloud.generate_from_frequencies(frequencies)
    return cloud.to_array()

显示我们的wordcloud图片。

myimage = calculate_frequencies(file_contents)
plt.imshow(myimage, interpolation = 'nearest')
plt.axis('off')
plt.show()

错误信息：

NameError                                 Traceback (most recent call last)
<ipython-input-2-fd0f708f372c> in <module>
      1 # Display your wordcloud image
      2 
----> 3 myimage = calculate_frequencies(file_contents)
      4 plt.imshow(myimage, interpolation = 'nearest')
      5 plt.axis('off')

NameError: name 'file_contents' is not defined

什么部分 file_contents 我是否缺少参数？为什么不能显示wordcloud？.txt 文件来自 uploader 小组件，但都无济于事。

 myimage = calculate_frequencies("Humpty Dumpty is a character in
 an English nursery rhyme, probably originally a riddle and one of the
 best known in the English-speaking world. He is typically portrayed 
as an anthropomorphic egg, though he is not explicitly described 
as such. ")  
plt.imshow(myimage, interpolation = 'nearest') 
plt.axis('off') plt.show()

StackOverflow

收藏 分享 链接