New to Programming: Adding custom functions with ipynotify classes

Steven D'Aprano steve+comp.lang.python at
Fri Apr 3 13:37:29 CEST 2015

On Fri, 3 Apr 2015 12:30 pm, Saran A wrote:

> Hello All:
> Here is the program that I am trying to write (with specs):

Do you have an actual question?

If you want a code review of your entire application, the polite thing to do
is to ask for volunteers first, before dropping 200+ lines of code on us.

If you have a specific question you would like to ask, then it is good to
focus on that issue alone, not your entire application. I see you say this:

> Many on forums suggest using ipynotify. I am wondering how to combine my
> current script and add it to the ipynotify.

Have you read the examples and followed the tutorial?

By the way, I have found at least one bug in your code:

> #This helper function returns the length of the file
> def file_len(f):
>     with open(f) as f:
>         for i, l in enumerate(f):
>             pass
>             return i + 1

Not as given it doesn't. It will raise an exception if the file cannot be
opened, and it will return 1 for any file you can read.

After you fix the incorrect indentation, the function is horribly
inefficient. Instead, use this:

import os


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