<｜begin▁of▁sentence｜>### Instruction:
How can you check if a progress handler is set for an InteractiveShell instance in IPython?
### Response:
from IPython.core.interactiveshell import InteractiveShell

# Assuming 'shell' is an instance of 'InteractiveShell'
progress_handler = shell.get_progress_handler()

if progress_handler:
    print('A progress handler is set.')
else:
    print('No progress handler is set.')
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