python中的二维数组索引

我想计算一个数组中的每个单词在文本文件中出现的次数。如果在shell中编写print语句，我将获得输出。但当我把它作为文件运行时就不是了。我遇到了一个错误“indexer-ror:list-index-out-range”。我是python初学者，请帮助我解决这个问题

from collections import Counter
from array import *
import string
cnt=Counter()
file = open('output.txt', 'r')
word =[ ]
c=[ ]
count =0
first_word =[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
word_count = [ ]
new_array =['CC','CD','DT','EX','FW','IN','JJ','JJR','JJS','LS','MD','NN','NNS','NNP','NNPS','PDT',
                       'POS','PRP','PRP$','RB','RBR','RBS','RP','SYM','TO','UH','VB','VBD','VBZ','WDT','WP$','WP','WRB']
for line in file:
      words = line.split()
      word.append(words)
for i in range(0,30):
      for j in range(0,33):
            if(new_array[j] in word[i][0]):
                  first_word[j]+=1
            else:
                  continue
print first_word

---

当您不想迭代

列表时，不要对
范围
使用显式值，而是使用正在迭代的列表长度。这样就不会出现索引错误。因此，替换：

for i in range(0,30):
      for j in range(0,33):

与：

我想它会解决这个问题。此外，当您必须使用类似的值初始化列表时，例如：

first_word =[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]

python中有一种简单的方法可以实现这一点：

>>> first_word = [0]*33
>>> first_word 
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]

我认为下面的代码应该可以得到您需要的结果：

wordsFromFile = []    
f = open("output.txt", 'r')
for each_line in f:
    wordsFromFile.extend(each_line.strip().split(" "))
f.close()

print wordsFromFile

new_array = ['CC','CD','DT','EX','FW','IN','JJ','JJR','JJS','LS','MD','NN','NNS','NNP','NNPS','PDT',
                       'POS','PRP','PRP$','RB','RBR','RBS','RP','SYM','TO','UH','VB','VBD','VBZ','WDT','WP$','WP','WRB']
first_word = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]

for eachWordFromFile in wordsFromFile:
    if eachWordFromFile in new_array: 
        first_word[new_array.index(eachWordFromFile)] += 1

#output results: 
for i in range(0,33):
    print str(new_array[i]) + ": " + str(first_word[i])

显示您的
output.txt
。我明确地设置了范围，但仍然显示相同的错误
wordsFromFile = []    
f = open("output.txt", 'r')
for each_line in f:
    wordsFromFile.extend(each_line.strip().split(" "))
f.close()

print wordsFromFile

new_array = ['CC','CD','DT','EX','FW','IN','JJ','JJR','JJS','LS','MD','NN','NNS','NNP','NNPS','PDT',
                       'POS','PRP','PRP$','RB','RBR','RBS','RP','SYM','TO','UH','VB','VBD','VBZ','WDT','WP$','WP','WRB']
first_word = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]

for eachWordFromFile in wordsFromFile:
    if eachWordFromFile in new_array: 
        first_word[new_array.index(eachWordFromFile)] += 1

#output results: 
for i in range(0,33):
    print str(new_array[i]) + ": " + str(first_word[i])