#1 pyparsing 1.2 Problmes with Hello Wolrd example ...

[Carl Reitschuster]

hi,
I installed the pypasring package :

F:\temp\pyparsing-1.2>python setup.py install
running install
running build
running build_py
creating build
creating build\lib
copying pyparsing.py -> build\lib
running install_lib
copying build\lib\pyparsing.py ->
C:\Python22\Lib\site-packages
byte-compiling
C:\Python22\Lib\site-packages\pyparsing.py to pyparsing.pyc

After this is tried the example Hello world :

>>> from pyparsing import Word, alphas
>>> greet = Word( alphas ) + "," + Word( alphas ) + "!"
>>> greeting = greet.parseString( "Hello, World!" )
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "pyparsing.py", line 480, in parseString
loc, tokens = self.parse( instring.expandtabs(), 0 )
File "pyparsing.py", line 430, in parse
loc,tokens = self.parseImpl( instring, loc, doActions )
File "pyparsing.py", line 1104, in parseImpl
loc, resultlist = self.exprs[0].parse( instring,
loc, doActions )
File "pyparsing.py", line 438, in parse
retTokens = ParseResults( tokens, self.resultsName,
asList=self.saveList )
File "pyparsing.py", line 119, in __new__
retobj.__doinit = True
AttributeError: 'ParseResults' object has no attribute
'_ParseResults__doinit'
>>>

Could you help me what the reason for the error stack is?
Regards
Carl r.

[Paul McGuire]

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I suspect this is also due to Python 2.2 issues with __slots__
or __new__ handling.

I run this example under Python 2.3.2 with no errors.

I'm afraid I'll have to document that this latest version of
pyparsing requires Python 2.3 or higher.

-- Paul

[Carl Reitschuster]

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i upgrade to Python 2.3 - no problem Paul :-)
Carl

[Nobody/Anonymous]

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Hi paul, it worked :

Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more
information.
>>> from pyparsing import Word, alphas
>>>
>>> greet = Word( alphas ) + "," + Word( alphas ) + "!"
>>> greeting = greet.parseString( "Hello, World!" )
>>> print greeting
['Hello', ',', 'World', '!']
>>>

[Paul McGuire]

Logged In: YES
user_id=893320

I will add the dependency on Python 2.3.2 or greater to the
pyparsing documentation.

Thanks for keeping me honest!!!

-- Paul