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Worker API (#2182)

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* worker class

* worker API tests

* tidy

* Decorator and more tests

* type fix

* error order

* more tests

* remove active message

* move worker manager to app

* cancel nodes

* typing fix

* revert change

* typing fixes and cleanup

* revert typing

* test fix

* cancel group

* Added test for worker

* comment

* workers docs

* Added exit_on_error

* changelog

* svg

* refactor test

* remove debug tweaks

* docstrings

* worker test

* fix typing in run

* fix 3.7 tests

* blog post

* fix deadlock test

* words

* words

* words

* workers docs

* blog post

* Apply suggestions from code review

Co-authored-by: Dave Pearson <davep@davep.org>

* docstring

* fix and docstring

* Apply suggestions from code review

Co-authored-by: Rodrigo Girão Serrão <5621605+rodrigogiraoserrao@users.noreply.github.com>

* Update src/textual/widgets/_markdown.py

Co-authored-by: Rodrigo Girão Serrão <5621605+rodrigogiraoserrao@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Rodrigo Girão Serrão <5621605+rodrigogiraoserrao@users.noreply.github.com>

* Update src/textual/worker.py

Co-authored-by: Rodrigo Girão Serrão <5621605+rodrigogiraoserrao@users.noreply.github.com>

* Fix black

* docstring

* merge

* changelog

---------

Co-authored-by: Dave Pearson <davep@davep.org>
Co-authored-by: Rodrigo Girão Serrão <5621605+rodrigogiraoserrao@users.noreply.github.com>
This commit is contained in:
Will McGugan
2023-04-04 13:12:51 +01:00
committed by GitHub
parent c1ef3702fd
commit b5689b1f69
31 changed files with 1813 additions and 56 deletions
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16
docs/examples/guide/workers/weather.css Normal file
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Input {
dock: top;
width: 100%;
}
#weather-container {
width: 100%;
height: 1fr;
align: center middle;
overflow: auto;
}
#weather {
width: auto;
height: auto;
}

40
docs/examples/guide/workers/weather01.py Normal file
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import httpx
from rich.text import Text
from textual.app import App, ComposeResult
from textual.containers import VerticalScroll
from textual.widgets import Input, Static
class WeatherApp(App):
"""App to display the current weather."""
CSS_PATH = "weather.css"
def compose(self) -> ComposeResult:
yield Input(placeholder="Enter a City")
with VerticalScroll(id="weather-container"):
yield Static(id="weather")
async def on_input_changed(self, message: Input.Changed) -> None:
"""Called when the input changes"""
await self.update_weather(message.value)
async def update_weather(self, city: str) -> None:
"""Update the weather for the given city."""
weather_widget = self.query_one("#weather", Static)
if city:
# Query the network API
url = f"https://wttr.in/{city}"
async with httpx.AsyncClient() as client:
response = await client.get(url)
weather = Text.from_ansi(response.text)
weather_widget.update(weather)
else:
# No city, so just blank out the weather
weather_widget.update("")
if __name__ == "__main__":
app = WeatherApp()
app.run()

40
docs/examples/guide/workers/weather02.py Normal file
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import httpx
from rich.text import Text
from textual.app import App, ComposeResult
from textual.containers import VerticalScroll
from textual.widgets import Input, Static
class WeatherApp(App):
"""App to display the current weather."""
CSS_PATH = "weather.css"
def compose(self) -> ComposeResult:
yield Input(placeholder="Enter a City")
with VerticalScroll(id="weather-container"):
yield Static(id="weather")
async def on_input_changed(self, message: Input.Changed) -> None:
"""Called when the input changes"""
self.run_worker(self.update_weather(message.value), exclusive=True)
async def update_weather(self, city: str) -> None:
"""Update the weather for the given city."""
weather_widget = self.query_one("#weather", Static)
if city:
# Query the network API
url = f"https://wttr.in/{city}"
async with httpx.AsyncClient() as client:
response = await client.get(url)
weather = Text.from_ansi(response.text)
weather_widget.update(weather)
else:
# No city, so just blank out the weather
weather_widget.update("")
if __name__ == "__main__":
app = WeatherApp()
app.run()

42
docs/examples/guide/workers/weather03.py Normal file
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import httpx
from rich.text import Text
from textual import work
from textual.app import App, ComposeResult
from textual.containers import VerticalScroll
from textual.widgets import Input, Static
class WeatherApp(App):
"""App to display the current weather."""
CSS_PATH = "weather.css"
def compose(self) -> ComposeResult:
yield Input(placeholder="Enter a City")
with VerticalScroll(id="weather-container"):
yield Static(id="weather")
async def on_input_changed(self, message: Input.Changed) -> None:
"""Called when the input changes"""
self.update_weather(message.value)
@work(exclusive=True)
async def update_weather(self, city: str) -> None:
"""Update the weather for the given city."""
weather_widget = self.query_one("#weather", Static)
if city:
# Query the network API
url = f"https://wttr.in/{city}"
async with httpx.AsyncClient() as client:
response = await client.get(url)
weather = Text.from_ansi(response.text)
weather_widget.update(weather)
else:
# No city, so just blank out the weather
weather_widget.update("")
if __name__ == "__main__":
app = WeatherApp()
app.run()

47
docs/examples/guide/workers/weather04.py Normal file
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import httpx
from rich.text import Text
from textual import work
from textual.app import App, ComposeResult
from textual.containers import VerticalScroll
from textual.widgets import Input, Static
from textual.worker import Worker
class WeatherApp(App):
"""App to display the current weather."""
CSS_PATH = "weather.css"
def compose(self) -> ComposeResult:
yield Input(placeholder="Enter a City")
with VerticalScroll(id="weather-container"):
yield Static(id="weather")
async def on_input_changed(self, message: Input.Changed) -> None:
"""Called when the input changes"""
self.update_weather(message.value)
@work(exclusive=True)
async def update_weather(self, city: str) -> None:
"""Update the weather for the given city."""
weather_widget = self.query_one("#weather", Static)
if city:
# Query the network API
url = f"https://wttr.in/{city}"
async with httpx.AsyncClient() as client:
response = await client.get(url)
weather = Text.from_ansi(response.text)
weather_widget.update(weather)
else:
# No city, so just blank out the weather
weather_widget.update("")
def on_worker_state_changed(self, event: Worker.StateChanged) -> None:
"""Called when the worker state changes."""
self.log(event)
if __name__ == "__main__":
app = WeatherApp()
app.run()

52
docs/examples/guide/workers/weather05.py Normal file
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from urllib.request import Request, urlopen
from rich.text import Text
from textual import work
from textual.app import App, ComposeResult
from textual.containers import VerticalScroll
from textual.widgets import Input, Static
from textual.worker import Worker, get_current_worker
class WeatherApp(App):
"""App to display the current weather."""
CSS_PATH = "weather.css"
def compose(self) -> ComposeResult:
yield Input(placeholder="Enter a City")
with VerticalScroll(id="weather-container"):
yield Static(id="weather")
async def on_input_changed(self, message: Input.Changed) -> None:
"""Called when the input changes"""
self.update_weather(message.value)
@work(exclusive=True)
def update_weather(self, city: str) -> None:
"""Update the weather for the given city."""
weather_widget = self.query_one("#weather", Static)
worker = get_current_worker()
if city:
# Query the network API
url = f"https://wttr.in/{city}"
request = Request(url)
request.add_header("User-agent", "CURL")
response_text = urlopen(request).read().decode("utf-8")
weather = Text.from_ansi(response_text)
if not worker.is_cancelled:
self.call_from_thread(weather_widget.update, weather)
else:
# No city, so just blank out the weather
if not worker.is_cancelled:
self.call_from_thread(weather_widget.update, "")
def on_worker_state_changed(self, event: Worker.StateChanged) -> None:
"""Called when the worker state changes."""
self.log(event)
if __name__ == "__main__":
app = WeatherApp()
app.run()