Question

我正在尝试计算长度介于1和5之间的单词数，文件大小约为4GB结束我收到内存错误。

import os 
files = os.listdir('C:/Users/rram/Desktop/') 
for file_name in files:     
    file_path = "C:/Users/rram/Desktop/"+file_name     
    f = open (file_path, 'r')    
    text = f.readlines()
    update_text = '' 
    wordcount = {}
    for line in text:         
        arr = line.split("|")
        word = arr[13]
        if 1<=len(word)<6:
            if word not in wordcount:
                wordcount[word] = 1
        else:
            wordcount[word] += 1
            update_text+= '|'.join(arr)
print (wordcount)     #print update_text
print 'closing', file_path, '\t', 'total files' , '\n\n'
f.close()

最后，我在MemoryError

这一行得到text = f.readlines()

你能帮助优化它吗？

Answer 1

正如评论中所建议的那样，你应该逐行阅读文件，而不是整个文件。

例如：

count = 0
with open('words.txt','r') as f:
    for line in f:
        for word in line.split():
          if(1 <= len(word) <=5):
              count=count+1
print(count)

编辑：

如果您只想计算第14个colomun中的单词并按＆＃34; |＆＃34;而是：

count = 0
with open('words.txt','r') as f:
    for line in f:
        iterator = 0
        for word in line.split("|"):
            if(1 <= len(word) <=5 and iterator == 13):
                count=count+1
            iterator = iterator +1
print(count)

请注意，您应该避免写这个

arr = line.split("|")
word = arr[13]

因为该行可能包含少于14个字，这可能导致分段错误。

在4GB文件上运行python脚本时出现内存错误

1 个答案: