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arcletalconna 1.8.29

Alconna

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About
Alconna is a powerful cli tool for parsing message chain or other raw message data. It is an overload version of CommandAnalysis, affiliated to ArcletProject.
Alconna has a large number of built-in components and complex parsing functions. But do not afraid, you can use it as a simple command parser.
Installation
pip
$ pip install --upgrade arclet-alconna
$ pip install --upgrade arclet-alconna[full]

Documentation
Official Document : 👉Link
Relevant Document : 📚Docs
A Simple Example
from arclet.alconna import Alconna, Option, Subcommand, Args

cmd = Alconna(
"/pip",
Subcommand("install", Option("-U|--upgrade"), Args["pak", str]),
Option("list")
)

result = cmd.parse("/pip install numpy --upgrade") # This method returns an 'Arparma' class instance.
print(result.query('install')) # Or result.install

Output as follows:
value=None args={'pak': 'numpy'} options={'upgrade': value=Ellipsis args={}} subcommands={}

Communication
QQ Group: Link
Features

High Performance. On i5-10210U, performance is about 71000~289000 msg/s; test script: benchmark
Intuitive way to create command components
Powerful Automatic Type Parse and Conversion
Customizable Help Text Formatter and Control of Command Analyser
i18n Support
Cache of input command for quick response of repeated command
Easy-to-use Construct and Usage of Command Shortcut
Can bind callback function to execute after command parsing
Can create command completion session to implement multi-round continuous completion prompt
Various Features (FuzzyMatch, Output Capture, etc.)

Example of Callback Executor:
# callback.py
from arclet.alconna import Alconna, Args

alc = Alconna("callback", Args["foo", int]["bar", str])

@alc.bind()
def callback(foo: int, bar: str):
print(f"foo: {foo}")
print(f"bar: {bar}")
print(bar * foo)

if __name__ == "__main__":
alc()

$ python callback.py 3 hello
foo: 3
bar: hello
hellohellohello

Example of Type Conversion:
from arclet.alconna import Alconna, Args
from pathlib import Path

read = Alconna("read", Args["data", bytes])

@read.bind()
def cb(data: bytes):
print(type(data))

read.parse(["read", b'hello'])
read.parse("read test_fire.py")
read.parse(["read", Path("test_fire.py")])

'''
<class 'bytes'>
<class 'bytes'>
<class 'bytes'>
'''

Example of Component creation:
# component.py
from arclet.alconna import Alconna, Args, Option, Subcommand, store_true, count, append

alc = Alconna(
"component",
Args["path", str],
Option("--verbose|-v", action=count),
Option("-f", Args["flag", str], compact=True, action=append),
Subcommand("sub", Option("bar", action=store_true, default=False))
)

if __name__ == '__main__':
res = alc()
print(res.query("path"))
print(res.query("verbose.value"))
print(res.query("f.flag"))
print(res.query("sub"))

$ python component.py /home/arclet -vvvv -f1 -f2 -f3 sub bar
/home/arclet
4
['1', '2', '3']
(value=Ellipsis args={} options={'bar': (value=True args={})} subcommands={})

Example of Command Shortcut:
# shortcut.py
from arclet.alconna import Alconna, Args

alc = Alconna("eval", Args["content", str])
alc.shortcut("echo", {"command": "eval print(\\'{*}\\')"})

@alc.bind()
def cb(content: str):
eval(content, {}, {})

if __name__ == '__main__':
alc()

$ python shortcut.py eval print(\"hello world\")
hello world
$ python shortcut.py echo hello world!
hello world!

Example of Command Completion:
# completion.py
from arclet.alconna import Alconna, Args, Option

alc = Alconna("complete", Args["bar", int]) + Option("foo") + Option("fool")

if __name__ == "__main__":
alc()

$ python completion.py ?
suggest input follows:
* bar: int
* --help
* -h
* foo
* fool

Example of typing Support:
from typing import Annotated # or typing_extensions.Annotated
from arclet.alconna import Alconna, Args

alc = Alconna("test", Args.foo[Annotated[int, lambda x: x % 2 == 0]])
alc.parse("test 2")
alc.parse("test 3")

'''
'foo': 2
ParamsUnmatched: param 3 is incorrect
'''

Example of FuzzyMatch:
# fuzzy.py
from arclet.alconna import Alconna, CommandMeta, Arg

alc = Alconna('!test_fuzzy', Arg("foo", str), meta=CommandMeta(fuzzy_match=True))

if __name__ == "__main__":
alc()

$ python fuzzy.py /test_fuzzy foo bar
/test_fuzy not matched. Are you mean "!test_fuzzy"?

Examples

Name
File

Calculate
calculate.py

Execute
exec_code.py

Request Route
endpoint.py

Image Search
img_search.py

PIP
pip.py

Database Query
exec_sql.py

License
Alconna is licensed under the MIT License.

Acknowledgement
JetBrains: Support Authorize for PyCharm