如何計算文本文件中的元素？

Question

我正在計算文本文件中的元素。我知道我錯過了一個顯而易見的部分，但我無法把它放在手指上。這是我目前有剛剛產生的字母數「F」不是文件：

filename = open("output3.txt") 
f = open("countoutput.txt", "w") 
import collections 
for line in filename: 
    for number in line.split(): 
     print(collections.Counter("f")) 
     break 

Answer 1

import collections 

counts = collections.Counter() # create a new counter 
with open(filename) as infile: # open the file for reading 
    for line in filename: 
     for number in line.split(): 
      counts.update((number,)) 
      print("Now there are {} instances of {}".format(counts[number], number)) 
print(counts)