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Project description

Collection of helpers and useful things for Python


Personal collection of helpers and often-useful snippets for Python

Install the latest version with pip install -U “git+”


  • bubble: syntactic sugar for super(…)
  • window: iterator over a ‘window’ of N adjacent elements
  • SmartDict: attr→item dict subclass (e.g. for d.key instead of d[‘key’])
  • DebugPlug: recursive duck-object for debug and testing purposes
  • repr_call: convenient syntactically-appropriate representation of call arguments (also used in DebugPlug)
  • fxrange, frange, dxrange, drange: xrange() / range() equivalents for float (without error accumulation) and Decimal
  • dict_fget, dict_fsetdefault: versions of dict.get and dict.setdefault with lazy-computation of the default value
  • interp, edi: two versions (simplified and format-supporting) of convenient string interpolation (or simplified templating)
  • split_list: simple one-pass splitting of list into two by a condition
  • use_cdecimal: forced instance-wide use (by monkey-hack) of cdecimal instead of decimal (for performance)
  • use_exc_ipdb: set unhandled exception handler to run
  • use_exc_log: set unhandled exception handler to log (by logging) the exception and the stack trace including (when possible) the local variables.
  • use_colorer: monkey-patch logging for colored logging
  • obj2dict: recursive converter of tree-structure of classes into a tree-structure of dicts, e.g. for pretty-printing the result
  • mk_logging_property: make a property that debug-logs the value and caller info when set
  • Some other things that are too minor to be listed here.

Also, in separate submodules:

  • psql: helpers for saving Django ORM objects into an SQL ‘COPY’-like file and loading it in one SQL command (for high-performance loading of large amounts of data into the database)
  • lzmah: lzma compress (as function and as an executable file); also provides a function unjsllzma to stream-read (json) lines from a pylzma-compressed file
  • lzcat: lzcat for pylzma-specific format (as function and as an executale file)
  • runlib: various things for runscripts:
    • init_logging: logging.basicConfig with useful defaults (for development runscripts).
    • sigeventer: list-based signal handler for SIGINT and SIGTERM (for appending handler functions, similarly to atexit)
    • make_manhole: init a Twisted SSH manhole with set up locals, key-based auth, etc.
  • twisted_aux: use_exc_log-equivalent for twisted (and a helper to remove the default logger).

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