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https://github.com/apparebit/konsole

Readable, pleasing console output for Python
https://github.com/apparebit/konsole

ansi-escape-codes color console logger logging python

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Readable, pleasing console output for Python

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README 

        
# konsole: readable, pleasing console output



> When you are writing a Python command line tool and your head is on fire

> because of overly rich frameworks that just don’t click.



![An interactive Python session using

konsole](https://raw.githubusercontent.com/apparebit/konsole/boss/session.png)



[konsole](https://github.com/apparebit/konsole) is a simple logger built on top

of Python's `logging` framework that prints to standard error and, if the

underlying terminal is amenable to it, does so with the judicious use of bold

and light type as well as a dash of color. This package's interface stands on

its own, no experience or direct interaction with `logging` required. At the

same time, this package plays equally well with other loggers, just leave

~~konsole~~ 🙄 console output to it.



## Using konsole



In order to use konsole, you need to go through the usual motions of installing



```shell

(venv) project % python3 -m pip install konsole

```



and then importing the package



```python

import konsole

```



konsole automatically integrates itself with Python’s logging system the first

time the module is imported into an application. Notably, it registers a handler

that prints messages to standard error with the root logger, replaces the

current logger class with a subclass that supports the `detail` keyword

argument, and enables the capture of Python warnings through the logging system.



konsole's public API follows below. It consists of one function to update the

configuration, one function to access the `__main__` application logger, and six

functions to print messages at different priority levels. konsole includes type

annotations, which have been validated with

[mypy](https://mypy.readthedocs.io/en/stable/).



### Configuring konsole



  * Change the minimum level for printing messages and/or the flag for forcing

    colors on/off.



    ```python

    def config(

        *,

        level: Optional[int] = None,

        use_color: Optional[bool] = None,

        volume: Optional[int] = None,

    ) -> None: ...

    ```



    konsole starts out with `INFO` as minimum level and uses color if

    standard error is a TTY. The `volume` argument provides an alternative

    means for setting the output level, with larger volumes printing more

    information and 0 corresponding to the `W



### Logging Messages



  * Get the `__main__` application logger. konsole uses it for writing messages.



    ```python

    def logger() -> logging.Logger

    ```



    The logger, like any other logger created after the initialization of

    konsole, supports the `detail` keyword argument (see below).



  * Log a message at the given level.



    ```python

    def critical(msg: str, *args: object, **kwargs: object) -> None: ...

    def error(msg: str, *args: object, **kwargs: object) -> None: ...

    def warning(msg: str, *args: object, **kwargs: object) -> None: ...

    def info(msg: str, *args: object, **kwargs: object) -> None: ...

    def debug(msg: str, *args: object, **kwargs: object) -> None: ...

    def log(level: int, msg: str, *args: object, **kwargs: object) -> None: ...

    ```



    The message string is the first and only mandatory argument. If the message

    string contains `%` format specifiers, the necessary values must follow as

    positional arguments.



    Valid keyword arguments include those supported by Python's logging

    framework, notably `exc_info` for including an exception's stacktrace. They

    also include `detail` for supplemental data. konsole prints the mapping,

    sequence, or scalar value on separate, indented lines after the message but

    before an exception's stacktrace.



    konsole defines ALL CAPS constants, e.g., `WARNING`, for the five levels

    above. They have the same values as the corresponding constants in Python's

    logging package.



---



© 2022 [Robert Grimm](https://apparebit.com).

Subject to [Apache 2.0](https://www.apache.org/licenses/LICENSE-2.0) license.

On [GitHub](https://github.com/apparebit/konsole).

On [PyPI](https://pypi.org/project/konsole/).