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Module pyparsing :: Class ParseExpression
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Class ParseExpression

source code

   object --+    
            |    
ParserElement --+
                |
               ParseExpression
Known Subclasses:

Abstract subclass of ParserElement, for combining and post-processing parsed tokens.

Nested Classes [hide private]

Inherited from ParserElement (private): _FifoCache, _UnboundedCache, _literalStringClass

Instance Methods [hide private]
 
__init__(self, exprs, savelist=False)
x.__init__(...) initializes x; see help(type(x)) for signature		 source code
 
append(self, other) source code
 
leaveWhitespace(self)
Extends ``leaveWhitespace`` defined in base class, and also invokes ``leaveWhitespace`` on all contained expressions.		 source code
 
ignore(self, other)
Define expression to be ignored (e.g., comments) while doing pattern matching; may be called repeatedly, to define multiple comment or other ignorable patterns.		 source code
 
__str__(self)
str(x)		 source code
 
streamline(self) source code
 
validate(self, validateTrace=None)
Check defined expressions for valid structure, check for infinite recursive definitions.		 source code
 
copy(self)
Make a copy of this :class:`ParserElement`.		 source code
 
_setResultsName(self, name, listAllMatches=False) source code

Inherited from ParserElement: __add__, __and__, __call__, __eq__, __getitem__, __hash__, __invert__, __iter__, __mul__, __ne__, __or__, __radd__, __rand__, __repr__, __req__, __rmul__, __rne__, __ror__, __rsub__, __rxor__, __sub__, __xor__, addCondition, addParseAction, canParseNext, checkRecursion, matches, parseFile, parseImpl, parseString, parseWithTabs, postParse, preParse, runTests, scanString, searchString, setBreak, setDebug, setDebugActions, setFailAction, setName, setParseAction, setResultsName, setWhitespaceChars, split, suppress, transformString, tryParse

Inherited from ParserElement (private): _parse, _parseCache, _parseNoCache, _skipIgnorables

Inherited from object: __delattr__, __format__, __getattribute__, __new__, __reduce__, __reduce_ex__, __setattr__, __sizeof__, __subclasshook__

Static Methods [hide private]

Inherited from ParserElement: enablePackrat, inlineLiteralsUsing, resetCache, setDefaultWhitespaceChars

Class Variables [hide private]

Inherited from ParserElement: DEFAULT_WHITE_CHARS, packrat_cache, packrat_cache_lock, packrat_cache_stats, verbose_stacktrace

Inherited from ParserElement (private): _packratEnabled

Properties [hide private]

Inherited from object: __class__

Method Details [hide private]

__init__(self, exprs, savelist=False)
(Constructor)

source code 

x.__init__(...) initializes x; see help(type(x)) for signature

Overrides: object.__init__
(inherited documentation)

leaveWhitespace(self)

source code 

Extends ``leaveWhitespace`` defined in base class, and also invokes ``leaveWhitespace`` on all contained expressions.

Overrides: ParserElement.leaveWhitespace

ignore(self, other)

source code 

Define expression to be ignored (e.g., comments) while doing pattern matching; may be called repeatedly, to define multiple comment or other ignorable patterns.

Example:

   patt = OneOrMore(Word(alphas))
   patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj']

   patt.ignore(cStyleComment)
   patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd']
Overrides: ParserElement.ignore
(inherited documentation)

__str__(self)
(Informal representation operator)

source code 

str(x)

Overrides: object.__str__
(inherited documentation)

streamline(self)

source code 
Overrides: ParserElement.streamline

validate(self, validateTrace=None)

source code 

Check defined expressions for valid structure, check for infinite recursive definitions.

Overrides: ParserElement.validate
(inherited documentation)

copy(self)

source code 

Make a copy of this :class:`ParserElement`. Useful for defining different parse actions for the same parsing pattern, using copies of the original parse element.

Example:

   integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
   integerK = integer.copy().addParseAction(lambda toks: toks[0] * 1024) + Suppress("K")
   integerM = integer.copy().addParseAction(lambda toks: toks[0] * 1024 * 1024) + Suppress("M")

   print(OneOrMore(integerK | integerM | integer).parseString("5K 100 640K 256M"))

prints:

   [5120, 100, 655360, 268435456]

Equivalent form of ``expr.copy()`` is just ``expr()``:

   integerM = integer().addParseAction(lambda toks: toks[0] * 1024 * 1024) + Suppress("M")
Overrides: ParserElement.copy
(inherited documentation)

_setResultsName(self, name, listAllMatches=False)

source code 
Overrides: ParserElement._setResultsName

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