[Tutor] Is implicit underscore assignment documented?

Alan Gauld alan.gauld at freenet.co.uk
Sat Jul 8 14:03:36 CEST 2006


>> Is this documented anywhere?

The language reference has this to say:
2.3.2 Reserved classes of identifiers
Certain classes of identifiers (besides keywords) have special 
meanings.
These classes are identified by the patterns of leading and trailing
underscore characters:


  _* Not imported by "from module import *". The special identifier 
"_"
  is used in the interactive interpreter to store the result of the 
last evaluation;
  it is stored in the __builtin__ module. When not in interactive 
mode, "_"
  has no special meaning and is not defined.
HTH,

Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld 




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