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I have a script written in vimscript-python, e.g.:

function! MyFunction()
python3 << EOF

# if <condition>:
#     return

print('Hello world')

EOF
endfunction

I want to add a check in the beginning of the script and if a check fails, the functions execution should be terminated. I tried using return and exit(), but return throws SyntaxError and exit() throws SystemExit exception. I want to stop execution without any errors.

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