How are packages imported affected when deleting cell?

[a9lara]

If I have defined x = 2 in a cell, and then I erase it, then x is no longer define. But, what happens with the imported packages? For example; if
cell 1: import PyPlot
and then I deleat cell 1 and then:
cell 2: import Plots
What does Pluto do with all loaded commands of PyPlot?

Regards.

Armando

[fonsp]

Good question! Technically, they are still there (it's not possible to fully unload something in Julia), but they are no longer available in your scope.

In the future, we might prompt you to restart the notebook after unloading a package.

For example, an evil package might do this in its loading process:

Base.sqrt(x::Int64) = "potato"

hello(x) = "soup"

After loading the package (using import Pakcage in your notebook), calling sqrt(5) will return potato. After removing the cell containing import Package, you can no longer do Package.hello(123), but sqrt(123) will still return potato. The only (simple) solution is to restart the notebook.

[a9lara]

Thank you very much

[fonsp]

#844 will detect this situation, and recommend to restart the notebook.

[a9lara]

Thank you very much! :)