ipython notebook is not updating when I change my code

Question

So, I ran into a weird issue using an ipython notebook and not sure what to do. Normally, when I run a part of the code, if there is an error, I would trace it back, fix it, and then re-run the code. I was doing a similar thing but even after making changes to the code, it looks like nothing is changing!

Here is the example... I am using Python 3.5 so xrange is gone. This then caused an error to be thrown:

XXXX      24     XXXX      25     XXXX ---> 26     for t in xrange(0,len(data),1):      27       28         XXXX       NameError: name 'xrange' is not defined 

but after changing my code (which you can see below the difference in line 26), the same error pops up!

XXXX      24     XXXX      25     XXXX ---> 26     for t in range(0,len(data),1):      27       28     XXX       NameError: name 'xrange' is not defined 

Any ideas on why this would be happening?

Answer 1

As Thomas K said, you're probably making a change in an external file that was not imported. There is a very useful command in ipython notebook for such cases, called autoreaload. With autoreaload, whenever you modify an external file you do not have to import it again because the extension takes care of it for you. For more information check: ipython autoreload.

Answer 2

Whenever using external files along with Ipython use autoreload. It will reload the external files every time before executing any code in IPython.

Add this at first cell of the IPython.

%load_ext autoreload %autoreload 2