Why does the last line in a cell generate output but preceding lines do not?

Question

Given this Jupyter notebook cell:

x = [1,2,3,4,5]
y = {1,2,3,4,5}
x
y

When the cell executes, it generates this output:

{1, 2, 3, 4, 5}

The last line in the cell generates output, the line above it has no effect. This works for any data type, as far as I can tell.

Here’s a snip of the same code as above:

Asked By: nicomp

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Answer 1

You can change this behaviour with:

from IPython.core.interactiveshell import InteractiveShell
InteractiveShell.ast_node_interactivity = "all"

The reason why only the last line is printed is that the default value of ast_node_interactivity is: last_expr.

Answered By: Nexif

Answer 2

One option is to add explicit print() calls. So for example you can do

print(x)
print(y)

to print out both values.

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