本文整理汇总了Python中pyparsing.Group.addParseAction方法的典型用法代码示例。如果您正苦于以下问题：Python Group.addParseAction方法的具体用法？Python Group.addParseAction怎么用？Python Group.addParseAction使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类pyparsing.Group的用法示例。
在下文中一共展示了Group.addParseAction方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: SExpressionParser
# 需要导入模块: from pyparsing import Group [as 别名]
# 或者: from pyparsing.Group import addParseAction [as 别名]
class SExpressionParser(object):
def __init__(self):
self.lpar = Literal('(')
self.rpar = Literal(')')
self.word_chars = ''.join(c for c in printables if c not in ('()'))
self.word = Word(self.word_chars) | quotedString
self.atom = self.word
self.expression = Forward()
self.composite_expression = (
Suppress(self.lpar) +
ZeroOrMore(self.expression) +
Suppress(self.rpar))('composite_expression')
self.composite_expression.addParseAction(
self._composite_expression_to_tuple)
self.expression << (self.atom | self.composite_expression)
self.expressions = Group(ZeroOrMore(self.expression))('expressions')
self.expressions.addParseAction(self._expressions_to_tuple)
def parse_expression(self, instring):
return self.expression.parseString(instring, parseAll=True)[0]
def parse_expressions(self, instring):
return self.expressions.parseString(instring, parseAll=True)[0]
@staticmethod
def _composite_expression_to_tuple(toks):
return SExpression(toks.composite_expression)
@staticmethod
def _expressions_to_tuple(toks):
return SExpressionList(toks.expressions)示例2: __init__
# 需要导入模块: from pyparsing import Group [as 别名]
# 或者: from pyparsing.Group import addParseAction [as 别名]
def __init__(self):
# define SQL tokens
selectStmt = Forward()
selectToken = Keyword("select", caseless=True)
fromToken = Keyword("from", caseless=True)
asToken = Keyword("as", caseless=True)
whereToken = Keyword("where", caseless=True)
semicolon = Literal(";")
ident = Word( alphas, alphanums + "_$" ).setName("identifier")
columnName = delimitedList( ident, ".", combine=True )
#columnName.setParseAction(upcaseTokens)
columnNameList = Group( columnName + ZeroOrMore("," + columnName))
# selectableList = Forward()
columnRvalList = Forward()
functionExpr = ident + Optional("."+ident) + Literal('(') + columnRvalList + Literal(')')
alias = Forward()
identExpr = functionExpr | ident
self.identExpr = identExpr # Debug
self.functionExpr = functionExpr # Debug
alias = ident.copy()
selectableName = identExpr | columnName
selectableList = Group( selectableName + ZeroOrMore(","+selectableName))
columnRef = columnName
functionSpec = functionExpr
valueExprPrimary = functionSpec | columnRef
numPrimary = valueExprPrimary ## | numericValFunc
factor = Optional(Literal("+") | Literal("-")) + numPrimary
muldiv = oneOf("* /")
term = Forward()
term << factor + Optional(muldiv + factor)
numericExpr = Forward()
addsub = oneOf("+ -")
numericExpr << term + Optional(addsub + numericExpr)
arithop = oneOf("+ - * /")
columnNumericExpr = Forward()
cTerm = valueExprPrimary
testme = valueExprPrimary + arithop + valueExprPrimary
columnNumericExpr << cTerm + Optional(arithop + columnNumericExpr)
colNumExpList = Group( columnNumericExpr + ZeroOrMore(","+columnNumericExpr))
valueExpr = numericExpr ## | stringExpr | dateExpr | intervalExpr
derivedColumn = valueExpr + Optional(asToken + alias)
selectSubList = derivedColumn + ZeroOrMore("," + derivedColumn)
tableName = delimitedList( ident, ".", combine=True )
# don't upcase table names anymore
# tableName.setParseAction(upcaseTokens)
self.tableAction = []
tableName.addParseAction(self.actionWrapper(self.tableAction))
tableName.setResultsName("table")
tableAlias = tableName + asToken + ident.setResultsName("aliasName")
tableAlias.setResultsName("alias")
genericTableName = tableAlias | tableName
genericTableName = genericTableName.setResultsName("tablename")
tableNameList = Group( genericTableName
+ ZeroOrMore("," + genericTableName))
whereExpression = Forward()
and_ = Keyword("and", caseless=True)
or_ = Keyword("or", caseless=True)
in_ = Keyword("in", caseless=True)
between_ = Keyword("between", caseless=True)
E = CaselessLiteral("E")
binop = oneOf("= != < > >= <= eq ne lt le gt ge", caseless=True)
arithSign = Word("+-",exact=1)
realNum = Combine( Optional(arithSign) + ( Word( nums ) + "."
+ Optional( Word(nums) ) |
( "." + Word(nums) ) ) +
Optional( E + Optional(arithSign) + Word(nums) ) )
intNum = Combine( Optional(arithSign) + Word( nums ) +
Optional( E + Optional("+") + Word(nums) ) )
# need to add support for alg expressions
columnRval = realNum | intNum | quotedString | columnNumericExpr# | numericExpr
columnRvalList << Group( columnRval + ZeroOrMore("," + columnRval))
self.whereExpAction = []
namedRv = columnRval.setResultsName("column")
whereConditionFlat = Group(
( functionSpec + binop + columnRval) |
( namedRv + binop + columnRval ) |
( namedRv + in_ + "(" + columnRval + ZeroOrMore(","+namedRv) + ")" ) |
( namedRv + in_ + "(" + selectStmt + ")" ) |
( namedRv + between_ + namedRv + and_ + namedRv ) )
whereConditionFlat.addParseAction(self.actionWrapper(self.whereExpAction))
whereCondition = Group(whereConditionFlat
| ( "(" + whereExpression + ")" ))
# Test code to try to make an expression parse.
# print whereConditionFlat.parseString("ABS(o1.ra - o2.ra) < 0.00083 / COS(RADIANS(o2.decl))")
#.........这里部分代码省略.........