def interactive_shell():
"""
Coroutine that shows the interactive command line.
"""
# Create interface. (style/layout is only for demonstration.)
cli = CommandLineInterface(
layout=Layout(before_input=DefaultPrompt(text='Say something inside the event loop: ')),
style=TestStyle)
# Patch stdout in something that will always print *above* the prompt when
# something is written to stdout.
sys.stdout = cli.stdout_proxy()
# Run echo loop. Read text from stdin, and reply it back.
while True:
try:
result = yield from cli.read_input_async(
on_exit=AbortAction.RAISE_EXCEPTION,
on_abort=AbortAction.RAISE_EXCEPTION)
print('You said: "%s"' % result.text)
except (Exit, Abort):
loop.stop()
print('Qutting event loop. Bye.')
return
