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Module: FlexCompleter eric3/Debugger/FlexCompleter.py

Word completion for the eric3 shell

NOTE for eric3 variant

This version is a re-implementation of FlexCompleter as found in the PyQwt package. It is modified to work with the eric3 debug clients.

NOTE for the PyQwt variant

This version is a re-implementation of FlexCompleter with readline support for PyQt&sip-3.6 and earlier.

Full readline support is present in PyQt&sip-snapshot-20030531 and later.

NOTE for FlexCompleter

This version is a re-implementation of rlcompleter with selectable namespace.

The problem with rlcompleter is that it's hardwired to work with __main__.__dict__, and in some cases one may have sandboxed namespaces. So this class is a ripoff of rlcompleter, with the namespace to work in as an optional parameter.

This class can be used just like rlcompleter, but the Completer class now has a constructor with the optional namespace parameter.

A patch has been submitted to Python@sourceforge for these changes to go in the standard Python distribution.

Original rlcompleter documentation:

This requires the latest extension to the readline module (the completes keywords, built-ins and globals in __main__; when completing NAME.NAME..., it evaluates (!) the expression up to the last dot and completes its attributes.

It's very cool to do "import string" type "string.", hit the completion key (twice), and see the list of names defined by the string module!

Tip: to use the tab key as the completion key, call

readline.parse_and_bind("tab: complete")

Notes:

  • Exceptions raised by the completer function are ignored (and generally cause the completion to fail). This is a feature -- since readline sets the tty device in raw (or cbreak) mode, printing a traceback wouldn't work well without some complicated hoopla to save, reset and restore the tty state.

  • The evaluation of the NAME.NAME... form may cause arbitrary application defined code to be executed if an object with a __getattr__ hook is found. Since it is the responsibility of the application (or the user) to enable this feature, I consider this an acceptable risk. More complicated expressions (e.g. function calls or indexing operations) are not evaluated.

  • GNU readline is also used by the built-in functions input() and raw_input(), and thus these also benefit/suffer from the completer features. Clearly an interactive application can benefit by specifying its own completer function and using raw_input() for all its input.

  • When the original stdin is not a tty device, GNU readline is never used, and this module (and the readline module) are silently inactive.

Imported modules   
import __builtin__
import __main__
Functions   
get_class_members
  get_class_members 
get_class_members ( klass )

Classes   

Completer


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