python - 如何在文本文件中查找字符串，Python

Question

如何获得在文本文件中使用某个 2 个字符的次数（例如（'hi'））以及如何将总和打印为 int？

我试过这样做：

for line in open('test.txt'):
  ly = line.split()
  for i in ly:
    a = i.count('ly')
    print(sum(a))

但是失败了，先谢谢了！

Answer 1

您的程序失败，因为您的变量a是一个整数，并且您不能将sum函数应用于整数。已经提出了几个例子。这是我的：

with open("test.txt") as fp:
    a = fp.read().count('ly')
print(a)

Answer 2

不同的方法：

from collections import Counter
text = open('text.txt').read() 
word_count = Counter(text.split())
print word_count['hi']

Answer 3

你可以简单地计算每一行的“ly”：

sum(line.count('ly') for line in open('test.txt'))

Answer 4

你可以试试这样的

for line in open('test.txt'):
    ly = line.split()
        for i in ly:
        if 'word' in i:
            a = a + 1
            print (a)

Answer 5

for line in open('test.txt'):
    ly = line.split()
    alist = [i.count('hi') for i in ly]
print sum(alist)