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request for comments

Here is your module code (which is saved in the file nester.py). In
the spaces provided, you were asked to use your pencil to compose
two comments: the first to describe the module and the second to
describe the function.

“““This is the “nester.py" module, and it provides one function called
print_lol() which prints lists that may or may not include nested lists.”””

Did you
remember to def print_lol(the_list):
include the triple “““This function takes a positional argument called “the_list", which is any
quotes? Python list (of, possibly, nested lists). Each data item in the provided list

is (recursively) printed to the screen on its own line.”””

for each_item in the_list:
if isinstance(each_item, list):
There are no changes to the
print_lol(each_item)
else: actual code here; you’re just
print(each_item) adding some comments.

Q: How do I know where the Python Q: Does it matter where I put my Q: Is there any other way to add a

modules are on my computer? nester.py module? comment to Python code?

A: Ask IDLE. Type import sys; A: For now, no. Just be sure to put it A: Yes. If you put a “#” symbol anywhere
sys.path (all on one line) into the IDLE somewhere where you can find it later. In on a line, everything from that point to the
prompt to see the list of locations that your a while, you’ll install your module into your end of the current line is a comment (unless
Python interpreter searches for modules. local copy of Python, so that the interpreter the “#” appears within a triple quote, in
Q: Hang on a second. I can use “;” to can find it without you having to remember of Python programmers use the “#” symbol
which case it’s part of that comment). A lot
when you actually put it.
put more than one line of code on the Q: to quickly switch on and off a single line of
same line in my Python programs? So comments are like a funny- code when testing new functionality.
looking string surrounded by quotes?
A: Yes, you can. However, I don’t
recommend that you do so. Better to give A: Yes. When a triple-quoted string is
each Python statement its own line; it makes not assigned to a variable, it’s treated like a
your code much easier for you (and others) comment. The comments in your code are
to read. surrounded by three double quotes, but you
could have used single quotes, too.
38 Chapter 2