如何使用python一次从文件中读取两行 [英] How do I read two lines from a file at a time using python

问题描述

我正在编写一个解析文本文件的 python 脚本.这个文本文件的格式是这样的，文件中的每个元素都使用两行，为了方便起见，我想在解析之前阅读这两行.这可以在 Python 中完成吗?

I am coding a python script that parses a text file. The format of this text file is such that each element in the file uses two lines and for convenience I would like to read both lines before parsing. Can this be done in Python?

我想要一些类似的东西:

I would like to some something like:

f = open(filename, "r")
for line in f:
    line1 = line
    line2 = f.readline()

f.close

但是这打破了:

ValueError:混合迭代和读取方法会丢失数据

ValueError: Mixing iteration and read methods would lose data

相关:

• 什么是以块为单位迭代列表的最pythonic"方式?

推荐答案

类似问题这里.您不能混合使用迭代和 readline，因此您需要使用其中之一.

Similar question here. You can't mix iteration and readline so you need to use one or the other.

while True:
    line1 = f.readline()
    line2 = f.readline()
    if not line2: break  # EOF
    ...

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