polling

Module to poll different functions.

This module contains function to poll for a specific outcome.

Typical usage example:

```python
poll(wait_for=lambda: not is_reload_in_progress(), sleep=2)
```

T module-attribute

T = typing.TypeVar('T')

tqdm

tqdm(*args, **kwargs)

Modifies the default function to print output to Output stream.

poll

poll(
    target,
    message=None,
    wait_for=None,
    sleep=5,
    backoff_interval=0.1,
    exponential_rate=3,
)

Polls wait_for callable until it returns True.

Parameters:

• target (Callable[..., T]) –

  Callable to poll target.

• message (Optional[Callable[[T], str]], default: None ) –

  Callable that takes target return value as input and transforms it to string displayed in progress bar.

• wait_for (Optional[Callable[[T], bool]], default: None ) –

  Callable that takes target return value as input and transforms it to boolean indicating whether polling is finished.

• sleep (int, default: 5 ) –

  Time duration to wait between pools.

• backoff_interval (float, default: 0.1 ) –

  Exponential backoff interval.

• exponential_rate (float, default: 3 ) –

  Exponential backoff rate.