IPython magic print variables on assignment

Question

Is there a parameter in IPython to print the variables each time I assign them ?

Currently:

In [1]: a = 5

In [2]: a
Out[2]: 5

In [3]: b = a + 1

In         


        

Answer 1

As of IPython 6.2, this exists, but the command to turn it on is really long:

%config InteractiveShell.ast_node_interactivity='last_expr_or_assign'

You can set it in your ipython_config.py, if you want it to be on by default:

c = get_config()
c.InteractiveShell.ast_node_interactivity = 'last_expr_or_assign'

It only triggers when the assignment target is a simple name; assignments like arr[i] = val or obj.attr = 3 will not auto-print.