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43 lines
1.0 KiB
Python
43 lines
1.0 KiB
Python
7 years ago
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import asyncio
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import itertools
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import sys
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async def spin(msg):
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write, flush = sys.stdout.write, sys.stdout.flush
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for char in itertools.cycle('|/-\\'):
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status = f"{char} {msg}"
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write(status)
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flush()
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write('\x08' * len(status)) # backspace out the line
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try:
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await asyncio.sleep(.1)
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except asyncio.CancelledError:
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break
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write(' ' * len(status) + '\x08' * len(status))
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async def slow_function():
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await asyncio.sleep(3)
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return 42
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async def supervisor():
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spinner = loop.create_task(spin('Thinking!'))
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print('Spinner Object:', spinner)
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result = await slow_function()
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spinner.cancel()
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return result
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if __name__ == '__main__':
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try:
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loop = asyncio.get_event_loop()
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# returns a Task object, not the result objects themselves. You have to access the Task result
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# to see the output
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result = loop.run_until_complete(supervisor())
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except Exception as e:
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pass
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finally:
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loop.close()
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