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"""# Nested progress bars
Example using nested progress bars in magicgui.
"""
import random
from time import sleep
from magicgui import magicgui
from magicgui.tqdm import tqdm, trange
# if magicui.tqdm.tqdm or trange are used outside of a @magicgui function, (such as in
# interactive use in IPython), then they fall back to the standard terminal output
# If use inside of a magicgui-decorated function
# a progress bar widget will be added to the magicgui container
@magicgui(call_button=True, layout="vertical")
def long_function(
steps=10, repeats=4, choices="ABCDEFGHIJKLMNOP12345679", char="", delay=0.05
):
"""Long running computation with nested iterators."""
# trange and tqdm accept all the kwargs from tqdm itself, as well as any
# valid kwargs for magicgui.widgets.ProgressBar, (such as "label")
for _r in trange(repeats, label="repeats"):
letters = [random.choice(choices) for _ in range(steps)]
# `tqdm`, like `tqdm`, accepts any iterable
# this progress bar is nested and will be run & reset multiple times
for letter in tqdm(letters, label="steps"):
long_function.char.value = letter
sleep(delay)
long_function.show(run=True)
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