expression = pp.Forward()
valid_word = pp.Regex(
r'([a-zA-Z0-9*_+.-]|\\\\|\\([+\-!(){}\[\]^"~*?:]|\|\||&&))+'
).setName("word")
valid_word.setParseAction(
lambda t: t[0].replace("\\\\", chr(127)).replace("\\", "").replace(chr(127), "\\")
)
string = pp.QuotedString('"')
required_modifier = pp.Literal("+")("required")
prohibit_modifier = pp.Literal("-")("prohibit")
integer = ppc.integer()
proximity_modifier = pp.Group(TILDE + integer("proximity"))
number = ppc.fnumber()
fuzzy_modifier = TILDE + pp.Optional(number, default=0.5)("fuzzy")
term = pp.Forward()
field_name = valid_word().setName("fieldname")
incl_range_search = pp.Group(LBRACK - term("lower") + to_ + term("upper") + RBRACK)
excl_range_search = pp.Group(LBRACE - term("lower") + to_ + term("upper") + RBRACE)
range_search = incl_range_search("incl_range") | excl_range_search("excl_range")
boost = CARAT - number("boost")
string_expr = pp.Group(string + proximity_modifier) | string
word_expr = pp.Group(valid_word + fuzzy_modifier) | valid_word
term << (
pp.Optional(field_name("field") + COLON)
+ (word_expr | string_expr | range_search | pp.Group(LPAR + expression + RPAR))
+ pp.Optional(boost)
keyword = and_ | or_ | not_ | to_
expression = Forward()
valid_word = Regex(r'([a-zA-Z0-9*_+.-]|\\[!(){}\[\]^"~*?\\:])+').setName(
"word")
valid_word.setParseAction(lambda t: t[0].replace('\\\\', chr(127)).replace(
'\\', '').replace(chr(127), '\\'))
string = QuotedString('"')
required_modifier = Literal("+")("required")
prohibit_modifier = Literal("-")("prohibit")
integer = Regex(r"\d+").setParseAction(lambda t: int(t[0]))
proximity_modifier = Group(TILDE + integer("proximity"))
number = pyparsing_common.fnumber()
fuzzy_modifier = TILDE + Optional(number, default=0.5)("fuzzy")
term = Forward()
field_name = valid_word().setName("fieldname")
incl_range_search = Group(LBRACK + term("lower") + to_ + term("upper") +
RBRACK)
excl_range_search = Group(LBRACE + term("lower") + to_ + term("upper") +
RBRACE)
range_search = incl_range_search("incl_range") | excl_range_search(
"excl_range")
boost = (CARAT + number("boost"))
string_expr = Group(string + proximity_modifier) | string
word_expr = Group(valid_word + fuzzy_modifier) | valid_word
term << (Optional(field_name("field") + COLON) +
# in order to use the int, we need to parse it manually...
print(2 * int(res[2]))
# option 2 (using named parser parts)
nam = Word(alphas)
integer = Word(nums)
assgnmt_v2 = nam("varname") + "=" + integer("value")
res = assgnmt_v2.parseString(assgnmt_str)
print(assgnmt_str, "->", res, repr(res))
print(res["varname"], res["value"])
# option 3
from pyparsing import pyparsing_common as cm
# there is a predefined f(loating?)number available...
assgnmt_v3 = Word(alphas) + "=" + cm.fnumber()
assgnmt_str2 = "a = 34.67"
res = assgnmt_v3.parseString(assgnmt_str)
print(res, 2 * res[2])
res = assgnmt_v3.parseString(assgnmt_str2)
print(res, 2 * res[2])
# run several parsing problems as test at once
assgnmt_v3.runTests("""\
a = 1.2
b = -4
a = 1.2e4
a = 0.001""")
keyword = and_ | or_ | not_ | to_
expression = Forward()
valid_word = Regex(r'([a-zA-Z0-9*_+.-]|\\[!(){}\[\]^"~*?\\:])+').setName("word")
valid_word.setParseAction(
lambda t : t[0].replace('\\\\',chr(127)).replace('\\','').replace(chr(127),'\\')
)
string = QuotedString('"')
required_modifier = Literal("+")("required")
prohibit_modifier = Literal("-")("prohibit")
integer = Regex(r"\d+").setParseAction(lambda t:int(t[0]))
proximity_modifier = Group(TILDE + integer("proximity"))
number = pyparsing_common.fnumber()
fuzzy_modifier = TILDE + Optional(number, default=0.5)("fuzzy")
term = Forward()
field_name = valid_word().setName("fieldname")
incl_range_search = Group(LBRACK + term("lower") + to_ + term("upper") + RBRACK)
excl_range_search = Group(LBRACE + term("lower") + to_ + term("upper") + RBRACE)
range_search = incl_range_search("incl_range") | excl_range_search("excl_range")
boost = (CARAT + number("boost"))
string_expr = Group(string + proximity_modifier) | string
word_expr = Group(valid_word + fuzzy_modifier) | valid_word
term << (Optional(field_name("field") + COLON) +
(word_expr | string_expr | range_search | Group(LPAR + expression + RPAR)) +
Optional(boost))
term.setParseAction(lambda t:[t] if 'field' in t or 'boost' in t else None)
