將文件讀入字典以檢查重複字的數量

Question

我正在嘗試編寫python代碼來讀取文件，從內容創建字典，然後檢查重複單詞的數量。下面的代碼是關於每個步驟的註釋：

import string 

# making a dictionary from a paragraph 
def make_dict(s): 
    some_list = s.split() 
    d = dict() 
    for word in some_list:    
     d[word] = 1 + d.get(word,0) 
    print d 
    print 
    print 
    return d 

#Inverse the dictionary 
# swap between key and value 

def invert_dict(s): 
    inverse = {} 
    d = make_dict(s) 
    for key in d: 
     val = d[key] 
     if val not in inverse: 
      inverse[val] = [key] 
     else: 
      inverse[val].append(key) 
    print inverse 
    print 
    print 
    return inverse 


# Reading a file and copying just plain text in other file  
def make_text(): 
    file_name = raw_input('Enter file name: ') 
    fn = open(file_name) 
    for line in fn: 
     line = line.translate(None,"!#$%&'()*+,-./:;<=>?@[\]^_`{|}~") 
     line = line.lower() 
     some_text = open('duplicate.txt','a') 
     some_text.write(line) 
     # print some_text 
     some_text.close() 
     fn.close() 
     return some_text 


some_file = make_text() 
some_dict = invert_dict(some_file) 
for key in some_dict: 
    print key , some_dict[key] 
    print 

當我運行代碼時，出現以下錯誤。有人能幫助解釋我做錯了什麼，以及如何解決錯誤？

Traceback (most recent call last): 
    File "C:\Users\KUMAR\Desktop\Python practice\DataStructureSelectionb\string_to_dictionary.py", line 51, in <module> 
    some_dict = invert_dict(some_file) 
    File "C:\Users\KUMAR\Desktop\Python practice\DataStructureSelectionb\string_to_dictionary.py", line 22, in invert_dict 
    d = make_dict(s) 
    File "C:\Users\KUMAR\Desktop\Python practice\DataStructureSelectionb\string_to_dictionary.py", line 8, in make_dict 
    some_list = s.split() 
AttributeError: 'file' object has no attribute 'split' 

Answer 1

你make_text函數返回像你似乎期望它已經寫入，而不是一個字符串（關閉）的文件對象。也許你想要返回line？

目前還不清楚你是否真的想從循環內返回，因爲那隻會處理用戶爲你指定的文件的第一行。如果你想閱讀整個文件，而不是僅僅一行，我會打電話fn.read()而不是迭代fn（誰的名字有點誤導，因爲它是一個文件對象，而不只是一個文件名）。或者，您可能希望make_text是一個生成器函數，yield每行（但這需要對其他代碼進行重大更改）。