[Python] Setting sys.displayhook only works if it's ran at the same time as other commands

I'd like to have Spyder print newlines between commands, so I run this:

# Force Spyder to print newlines every command
def alwaysprint_displayhook(value):
if value is not None:
sys.stdout.write(str(value) + "\n\n")

sys.displayhook = alwaysprint_displayhook


However, it only runs if I run everything at once like:

sys.displayhook = alwaysprint_displayhook
df1.columns
df2.columns


Instead, I would like it to be globally set. Having Spyder run those lines at startup does not work.
displayhook documentation:
https://docs.python.org/3/library/sys.html#sys.displayhook

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