Directory error? Mac

[jconway2190]

Hi there,

First post here, i've been messing around with Python for a while now and recently decided to do an online class about it. I've been doing fine with all lessons and have been able to figure out/overcome most problems/questions I've ran into but now I'm stuck. In this one we're working with iters and creating a simple code to open a list of all .py files in terminal. The code he used was:

import os
files = os.popen('dir *.py')
fileit = iter(files)
print(next(fileit))

And when he saves it and runs it whatever is equivalent to terminal on a PC, it lists all of the .py files with no question. When I run it i get the follow error message in terminal: 

sh: dir: command not found
Traceback (most recent call last):
  File "/users/james/python/otheriters.py", line 7, in <module>
    print(next(fileit))
StopIteration

I'm very lost and am wondering if the sequence is different on a mac or what?? As I said, I relatively new to Python but have been loving working with it recently and really any help is appreciated. I am using Python 2.7.10 and running in Terminal on a Mac.

Thank you

[volcano63]

dir is purely DOS/Windows command; on Mac (*nix) use ls

[sparkz_alot]

print(next(fileit))

This is the format of of Python 3's print() function.
If you're on a Mac, you might have Python 3 already installed, from the command line, type "python3" rather than "python"

[volcano63]

This is the format of of Python 3's print() function.
If you're on a Mac, you might have Python 3 already installed, from the command line, type "python3" rather than "python"

This is not the problem - please, take a look at line 2