trickkiste 0.3.0

Random useful stuff

trickkiste

trickkiste is a collection of convenience functionality I use quite often that are too small to give them their own project on the one side but prone to changes due to changes to the Python ecosystem to just copy&paste them and leave them as they are.

So they are here now, enjoy.

Beware: most of this is not part of any standard library for a reason. That reason might be there are better built in solutions which are harder (but more flexible) to use or I just didn't find them back then. In most cases you're advised to build them your own (to avoid dependencies and bugs).

Here is an overview of what's in here, see the docstings for a better description (some even have a doctest!):

misc

• throw(BaseException): functional raise for closed expressions

• md5from(Path): convenient wrapper returning an MD5 file checksum

• cwd(Path): path changing context manager

• process_output(cmd): short form for 'run a command and return it's output as one string'

• asyncify: decorator turning a sync method or function into an async one

• async_chain: like chain but async

• async_filter: like filter but async

• date_str(timestamp, [datefmt]): convenience wrapper for strftime

• def date_from(timestamp: float | str): : convenience wrapper for strptime

• dur_str(seconds, [fixed]): short human readable representation of a duration

• age_str(now, age, [fixed]): like dur_str but with an age context

• parse_age(string: str): inverse of age_str

• smart_split(string: str, delimiter: str = ","): like split but parenthesis aware!

• multi_replace(string: str, *substitutions: tuple[str, str]): short form for chainging replace

• compact_dict(mapping, [maxlen], [delim]): create a short one-string map

• def split_params(string: str): inverse of compact_dict

logging

• apply_common_logging_cli_args(ArgumentParser): enrich a given parser to recognize default stuff like --verbose, etc.
• setup_logging: sets up a rich enhanced logger with useful stuff like call stack and posix thread id
• logging filters: internally used by setup_logging but can be re-used of course
  • markup_escape_filter: escapes (accidental) markup elements in the message
  • thread_id_filter: adds the (posix) thread id
  • callstack_filter: adds a short call stack
  • logger_name_filter: adds the logger name (rich edition)
  • logger_funcname_filter: adds the function name (rich edition)
  • logger_levelname_filter: adds the level name (rich edition)

Textual stuff / TuiBaseApp

• TuiBaseApp: like textual.App but with convenience stuff mostly regarding logging
• RichLogHandler: a logging handler for a textual widget
• LockingRichLog: locks your log view scroll position until you scroll to the bottom
• HeatBar: a colorful heat bar widget for things like CPU monitoring

std_suppress

std_suppress (with it's own shell entry point suppress) can be prefixed to a command and acts like adding >/dev/null 2>&1 but will print the output if the command needs 'longer than expected' something bad happens (i.e. nonzero exit). Use it in scripts where you don't need the output to spam your log but you still want to know if something unusual happend.