如何计算文本文件中的元素？

Question

我正在尝试计算文本文件中的元素。 我知道我遗漏了一个明显的部分，但我无法理解它。 这就是我目前所拥有的，它只生成字母“f”的计数而不是文件：

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 infile: 
        for number in line.split(): 
            counts.update((number,))
            print("Now there are {} instances of {}".format(counts[number], number))
print(counts)