What's the Pythonic way to go about reading files line by line of the two methods below?

with open('file', 'r') as f:for line in f:print line

or

with open('file', 'r') as f:for line in f.readlines():print line

Or is there something I'm missing?

File handles are their own iterators (specifically, they implement the iterator protocol) so

with open('file', 'r') as f:for line in f:# code

Is the preferred usage. f.readlines() returns a list of lines, which means absorbing the entire file into memory -> generally ill advised, especially for large files.

It should be pointed out that I agree with the sentiment that context managers are worthwhile, and have included one in my code example.