# cancel one dict entry

Using sage notebook, is there a way to cancel an entry from an already defined dictionary without rewriting the whole dict ?

For example, let's say my sage worksheet goes as such:

`soln = {}; # defining dictionary`

`soln[b] = 0.5`

`soln[c] = 0.2`

`soln[N] = 6;`

etc. for many more soln entries

Then I do something which requires all values in `soln`

, and after, I want to plot a function which uses all of `soln`

values but one, say `N`

. How can I cancel it ?

What I currently do is rerun my whole worksheet cell by cell after having commented the `soln[N] = 6;`

line, but it takes more time than I'd like.

Thanks in advance!