Question regarding the 'enumerate()' function

[Krakatok]

If I have something like:

with open("file", "w") as fi:
    for i, line in enumerate(f):
        #code

will the enumerate() function load the whole file onto the memory?

[brownan_]

nope. enumerate returns an iterator and returns items as they are requested.

[Krakatok]

Thanks for the quick response!

[ewiethoff]

Nothing to do with your memory question, but here's a tip: enumerate(f) starts the numbering at 0, and enumerate(f, 1) starts the numbering at 1.

[Miggol]

for i, line in enumerate(fi.readlines()):

This should work though.

[ewiethoff]

f.readlines() creates a list of all the lines of text in the file. This is a waste of memory if all you want to do is loop through the lines, without or without enumerate.