python - 在文件中搜索单词后读取文件的剩余行

Question

我正在尝试在找到单词后读取文件的其余部分。

我正在尝试编写一个程序来搜索文件中的单词，然后，当找到该单词时，它需要对该单词下方/之后的剩余行执行某些操作。

这是我到目前为止所拥有的，但它不起作用。请协助。谢谢。

def readFile():
    with open(“file.txt”, "r") as file:
        for line in file:
            if “Hello” in line:
                break
        nextline = file.readlines()
        for line in nextline 
            print(line)

Answer 1

您不能混合迭代(它基本上在循环中调用 file.next 方法)和 readlines。

引用一位伟人的话(和 file.next 文档):

In order to make a for loop the most efficient way of looping over the lines of a file (a very common operation), the next() method uses a hidden read-ahead buffer. As a consequence of using a read-ahead buffer, combining next() with other file methods (like readline()) does not work right

您只需使用迭代就可以做得很好:

def readFile():
    with open("file.txt", "r") as file:
        for line in file:
            if "Hello" in line:
                break
        for line in file:
            # do something with the line