Python说：AttributeError：'_ io.TextIOWrapper'对象没有属性'

Question

我正在用Python编写一个程序，它将计算文件中的频繁字符。它所计算的字符由用户决定。我一直在收到这条消息，而且我一直在努力争取最长的时间来解决这个问题：

filename = open('all-Names.txt', 'r')
character = input("Enter character: ")
x = filename.count(character) 
print(x)
filename.close()

Answer 1

文件对象上没有count()方法。您应该遍历文件行并总结每行的计数：

character = input("Enter character: ")

with open('all-Names.txt', 'r') as f:
    print(sum(line.count(character) for line in f))

演示：

$ cat all-Names.txt 
test
test2
test3
test4
test5
$ python
...
>>> character = input("Enter character: ")
Enter character: t
>>> with open('all-Names.txt', 'r') as f:
...    print(sum(line.count(character) for line in f))
... 
10