How can I read large text files in Python, line by line, without loading it into memory?

Question

I need to read a large file, line by line. Lets say that file has more than 5GB and I need to read each line, but obviously I do not want to use readlines() bec

Answer 1

I provided this answer because Keith's, while succinct, doesn't close the file explicitly

with open("log.txt") as infile:
    for line in infile:
        do_something_with(line)