How do I read two lines from a file at a time using python

Question

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?

I would like to some something like:

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

f.close

But this breaks saying that:

ValueError: Mixing iteration and read methods would lose data

Related:

• What is the most “pythonic” way to iterate over a list in chunks?

Answer 1

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
    ...