I am trying to create a single progress bar that will be updated whenever an async task is done.
I have the following code
scan_results = [] tasks = [self.run_scan(i) for i in input_paths] pbar = tqdm(total=len(tasks), desc='Scanning files') for f in asyncio.as_completed(tasks): value = await f pbar.update(1) scan_results.append(value)
The above code generates a single progress bar as but it is not updated until all tasks are finished (it shows either 0% or 100% while there’s more than a single task)
I also tried using tqdm.asyncio.tqdm.gather
with tqdm(total=len(input_paths)): scan_results = await tqdm.gather(*[self.run_scan(i) for i in input_paths])
The above code generates multiple progress bars and as in the previous code block, it shows either 0% or 100%
My starting point was
scan_results = await asyncio.gather(*[self.run_scan(i)for i in input_paths])
Would appreciate your help on making it work with a single and dynamic progress bar
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Answer
If you call self.pbar.update(1)
inside the run_scan
scan method after creating concurrent tasks, each task will update the pbar
for self. So your class should look like the following
class Cls: async def run_scan(self, path): ... self.pbar.update(1) def scan(self, input_paths): loop = asyncio.get_event_loop() tasks = [loop.create_task(self.run_scan(i)) for i in input_paths] self.pbar = tqdm(total=len(input_paths), desc='Scanning files') loop.run_until_complete(asyncio.gather(*tasks)) loop.close()