def make_date_parser():
date_expr = ppc.iso8601_date.copy()
date_expr.setParseAction(ppc.convertToDate())
expr_last = (
CaselessKeyword('LAST') & ppc.integer.setResultsName('n')
& StringEnd()).setResultsName('interval').setParseAction(handle_last)
expr_prev = (CaselessKeyword('PREVIOUS') & Or(
CaselessKeyword('DAY').setResultsName('day')
| CaselessKeyword('WEEK').setResultsName('week')
| CaselessKeyword('MONTH').setResultsName('month')) + StringEnd()
).setResultsName('interval').setParseAction(handle_previous)
expr_fromto_date = (
CaselessKeyword('FROM') + date_expr.setResultsName('start') +
CaselessKeyword('TO') + date_expr.setResultsName('end') +
StringEnd()).setResultsName('interval').setParseAction(handle_fromto)
parser = expr_fromto_date | expr_last | expr_prev
return parser
def getLiteral(self):
'''
get the literal sub Grammar
'''
uri=Regex(SiDIFParser.getUriRegexp())('uri')
booleanLiteral=oneOf(["true","false"]).setParseAction(self.convertToBoolean)('boolean')
hexLiteral=(Suppress("0x")+(Word(hexnums).setParseAction(tokenMap(int, 16))))('hexLiteral')
integerLiteral=pyparsing_common.signed_integer('integerLiteral')
floatingPointLiteral=Group(
pyparsing_common.sci_real|pyparsing_common.real
).setParseAction(self.handleGroup)('floatingPointLiteral')
timeLiteral=Regex(r"[0-9]{2}:[0-9]{2}(:[0-9]{2})?").setParseAction(self.convertToTime)('timeLiteral')
dateLiteral=pyparsing_common.iso8601_date.copy().setParseAction(pyparsing_common.convertToDate())('dateLiteral')
dateTimeLiteral=Group(
dateLiteral+Optional(timeLiteral)
).setParseAction(self.handleDateTimeLiteral)('dateTimeLiteral')
stringLiteral=Group(
Suppress('"')+ZeroOrMore(CharsNotIn('"')|LineEnd())+Suppress('"')
).setParseAction(self.handleStringLiteral)('stringLiteral')
literal=Group(
uri | stringLiteral | booleanLiteral | hexLiteral | dateTimeLiteral | timeLiteral | floatingPointLiteral| integerLiteral
).setParseAction(self.handleGroup)("literal")
return literal
Optional('-')
+ Word(nums)
+ Literal('f').suppress()
).addParseAction(ppc.convertToFloat)
NUMBER = (
FLOAT2 | FLOAT | INTEGER
).setName("NUMBER")
DATE_DDMMYYYY = Combine(
DIGIT + DIGIT
+ '-'
+ DIGIT + DIGIT
+ '-'
+ DIGIT + DIGIT + DIGIT + DIGIT
).addParseAction(ppc.convertToDate('%d-%m-%Y'))
DATE_YYYYMMDD = Combine(
DIGIT + DIGIT + DIGIT + DIGIT
+ '-'
+ DIGIT + DIGIT
+ '-'
+ DIGIT + DIGIT
).addParseAction(ppc.convertToDate('%Y-%m-%d'))
DATE = (
DATE_DDMMYYYY
| DATE_YYYYMMDD
)
DATETIME_DDMMYYYY = Combine(
date_expr.runTests("""\
2000/1/1
# invalid month
2000/13/1
# 1900 was not a leap year
1900/2/29
# but 2000 was
2000/2/29
""")
# if dates conform to ISO8601, use definitions in pyparsing_common
date_expr = ppc.iso8601_date.setParseAction(ppc.convertToDate())
date_expr.ignore(pp.pythonStyleComment)
date_expr.runTests("""\
2000-01-01
# invalid month
2000-13-01
# 1900 was not a leap year
1900-02-29
# but 2000 was
2000-02-29
""")