Interpolation bug in jupyter magic

[mlucool]

Hi,

We came across a bug in the jupyter magic (https://github.com/joerick/pyinstrument/blob/main/pyinstrument/magic/magic.py):

>>> x = 1
>>> %pyinstrument print("$x")
1

This should print "$x" and not interpolates it. The same is true for things in {} like %pyinstrument print("hello {len('world')}") (%time print("hello {len('world')}") works as expected).

While I'm not sure why this happens, I think moving to the now officially supported way to do this ast_mod would fix it (at the very least a simple test shows ast_mod does not have this bug).

Would it be ok to make a PR to move to this, knowing it only works for IPython 8.15+ (release notes)? If not, maybe we can do a version check and newer IPython versions use this and older code falls back to what we have today as most users don't seem to have run into this.

[krassowski]

Interpolation in IPython magics can be removed by adding @no_var_expand which is also supported in older IPython versions.

[joerick]

just released v4.6.1 with the fix :)

[krassowski]

Thank you!