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import math
import random
import time
import click
@click.group()
def cli():
"""This script showcases different terminal UI helpers in Click."""
pass
@cli.command()
def colordemo():
"""Demonstrates ANSI color support."""
for color in "red", "green", "blue":
click.echo(click.style(f"I am colored {color}", fg=color))
click.echo(click.style(f"I am background colored {color}", bg=color))
@cli.command()
def pager():
"""Demonstrates using the pager."""
lines = []
for x in range(200):
lines.append("{}. Hello World!".format(click.style(str(x), fg="green")))
click.echo_via_pager("\n".join(lines))
@cli.command()
@click.option(
"--count",
default=8000,
type=click.IntRange(1, 100000),
help="The number of items to process.",
)
def progress(count):
"""Demonstrates the progress bar."""
items = range(count)
def process_slowly(item):
time.sleep(0.002 * random.random())
def filter(items):
for item in items:
if random.random() > 0.3:
yield item
with click.progressbar(
items, label="Processing accounts", fill_char=click.style("#", fg="green")
) as bar:
for item in bar:
process_slowly(item)
def show_item(item):
if item is not None:
return f"Item #{item}"
with click.progressbar(
filter(items),
label="Committing transaction",
fill_char=click.style("#", fg="yellow"),
item_show_func=show_item,
) as bar:
for item in bar:
process_slowly(item)
with click.progressbar(
length=count,
label="Counting",
bar_template="%(label)s %(bar)s | %(info)s",
fill_char=click.style("█", fg="cyan"),
empty_char=" ",
) as bar:
for item in bar:
process_slowly(item)
with click.progressbar(
length=count,
width=0,
show_percent=False,
show_eta=False,
fill_char=click.style("#", fg="magenta"),
) as bar:
for item in bar:
process_slowly(item)
# 'Non-linear progress bar'
steps = [math.exp(x * 1.0 / 20) - 1 for x in range(20)]
count = int(sum(steps))
with click.progressbar(
length=count,
show_percent=False,
label="Slowing progress bar",
fill_char=click.style("█", fg="green"),
) as bar:
for item in steps:
time.sleep(item)
bar.update(item)
@cli.command()
@click.argument("url")
def open(url):
"""Opens a file or URL In the default application."""
click.launch(url)
@cli.command()
@click.argument("url")
def locate(url):
"""Opens a file or URL In the default application."""
click.launch(url, locate=True)
@cli.command()
def edit():
"""Opens an editor with some text in it."""
MARKER = "# Everything below is ignored\n"
message = click.edit(f"\n\n{MARKER}")
if message is not None:
msg = message.split(MARKER, 1)[0].rstrip("\n")
if not msg:
click.echo("Empty message!")
else:
click.echo(f"Message:\n{msg}")
else:
click.echo("You did not enter anything!")
@cli.command()
def clear():
"""Clears the entire screen."""
click.clear()
@cli.command()
def pause():
"""Waits for the user to press a button."""
click.pause()
@cli.command()
def menu():
"""Shows a simple menu."""
menu = "main"
while 1:
if menu == "main":
click.echo("Main menu:")
click.echo(" d: debug menu")
click.echo(" q: quit")
char = click.getchar()
if char == "d":
menu = "debug"
elif char == "q":
menu = "quit"
else:
click.echo("Invalid input")
elif menu == "debug":
click.echo("Debug menu")
click.echo(" b: back")
char = click.getchar()
if char == "b":
menu = "main"
else:
click.echo("Invalid input")
elif menu == "quit":
return
|
