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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ# common.py from .core import * from .helpers import delimited_list, any_open_tag, any_close_tag from datetime import datetime # some other useful expressions - using lower-case class name since we are really using this as a namespace class pyparsing_common: """Here are some common low-level expressions that may be useful in jump-starting parser development: - numeric forms (:class:`integers`, :class:`reals`, :class:`scientific notation`) - common :class:`programming identifiers` - network addresses (:class:`MAC`, :class:`IPv4`, :class:`IPv6`) - ISO8601 :class:`dates` and :class:`datetime` - :class:`UUID` - :class:`comma-separated list` - :class:`url` Parse actions: - :class:`convertToInteger` - :class:`convertToFloat` - :class:`convertToDate` - :class:`convertToDatetime` - :class:`stripHTMLTags` - :class:`upcaseTokens` - :class:`downcaseTokens` Example:: pyparsing_common.number.runTests(''' # any int or real number, returned as the appropriate type 100 -100 +100 3.14159 6.02e23 1e-12 ''') pyparsing_common.fnumber.runTests(''' # any int or real number, returned as float 100 -100 +100 3.14159 6.02e23 1e-12 ''') pyparsing_common.hex_integer.runTests(''' # hex numbers 100 FF ''') pyparsing_common.fraction.runTests(''' # fractions 1/2 -3/4 ''') pyparsing_common.mixed_integer.runTests(''' # mixed fractions 1 1/2 -3/4 1-3/4 ''') import uuid pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID)) pyparsing_common.uuid.runTests(''' # uuid 12345678-1234-5678-1234-567812345678 ''') prints:: # any int or real number, returned as the appropriate type 100 [100] -100 [-100] +100 [100] 3.14159 [3.14159] 6.02e23 [6.02e+23] 1e-12 [1e-12] # any int or real number, returned as float 100 [100.0] -100 [-100.0] +100 [100.0] 3.14159 [3.14159] 6.02e23 [6.02e+23] 1e-12 [1e-12] # hex numbers 100 [256] FF [255] # fractions 1/2 [0.5] -3/4 [-0.75] # mixed fractions 1 [1] 1/2 [0.5] -3/4 [-0.75] 1-3/4 [1.75] # uuid 12345678-1234-5678-1234-567812345678 [UUID('12345678-1234-5678-1234-567812345678')] """ convert_to_integer = token_map(int) """ Parse action for converting parsed integers to Python int """ convert_to_float = token_map(float) """ Parse action for converting parsed numbers to Python float """ integer = Word(nums).set_name("integer").set_parse_action(convert_to_integer) """expression that parses an unsigned integer, returns an int""" hex_integer = ( Word(hexnums).set_name("hex integer").set_parse_action(token_map(int, 16)) ) """expression that parses a hexadecimal integer, returns an int""" signed_integer = ( Regex(r"[+-]?\d+") .set_name("signed integer") .set_parse_action(convert_to_integer) ) """expression that parses an integer with optional leading sign, returns an int""" fraction = ( signed_integer().set_parse_action(convert_to_float) + "/" + signed_integer().set_parse_action(convert_to_float) ).set_name("fraction") """fractional expression of an integer divided by an integer, returns a float""" fraction.add_parse_action(lambda tt: tt[0] / tt[-1]) mixed_integer = ( fraction | signed_integer + Opt(Opt("-").suppress() + fraction) ).set_name("fraction or mixed integer-fraction") """mixed integer of the form 'integer - fraction', with optional leading integer, returns float""" mixed_integer.add_parse_action(sum) real = ( Regex(r"[+-]?(?:\d+\.\d*|\.\d+)") .set_name("real number") .set_parse_action(convert_to_float) ) """expression that parses a floating point number and returns a float""" sci_real = ( Regex(r"[+-]?(?:\d+(?:[eE][+-]?\d+)|(?:\d+\.\d*|\.\d+)(?:[eE][+-]?\d+)?)") .set_name("real number with scientific notation") .set_parse_action(convert_to_float) ) """expression that parses a floating point number with optional scientific notation and returns a float""" # streamlining this expression makes the docs nicer-looking number = (sci_real | real | signed_integer).setName("number").streamline() """any numeric expression, returns the corresponding Python type""" fnumber = ( Regex(r"[+-]?\d+\.?\d*([eE][+-]?\d+)?") .set_name("fnumber") .set_parse_action(convert_to_float) ) """any int or real number, returned as float""" identifier = Word(identchars, identbodychars).set_name("identifier") """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')""" ipv4_address = Regex( r"(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}" ).set_name("IPv4 address") "IPv4 address (``0.0.0.0 - 255.255.255.255``)" _ipv6_part = Regex(r"[0-9a-fA-F]{1,4}").set_name("hex_integer") _full_ipv6_address = (_ipv6_part + (":" + _ipv6_part) * 7).set_name( "full IPv6 address" ) _short_ipv6_address = ( Opt(_ipv6_part + (":" + _ipv6_part) * (0, 6)) + "::" + Opt(_ipv6_part + (":" + _ipv6_part) * (0, 6)) ).set_name("short IPv6 address") _short_ipv6_address.add_condition( lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8 ) _mixed_ipv6_address = ("::ffff:" + ipv4_address).set_name("mixed IPv6 address") ipv6_address = Combine( (_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).set_name( "IPv6 address" ) ).set_name("IPv6 address") "IPv6 address (long, short, or mixed form)" mac_address = Regex( r"[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}" ).set_name("MAC address") "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)" @staticmethod def convert_to_date(fmt: str = "%Y-%m-%d"): """ Helper to create a parse action for converting parsed date string to Python datetime.date Params - - fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%d"``) Example:: date_expr = pyparsing_common.iso8601_date.copy() date_expr.setParseAction(pyparsing_common.convertToDate()) print(date_expr.parseString("1999-12-31")) prints:: [datetime.date(1999, 12, 31)] """ def cvt_fn(ss, ll, tt): try: return datetime.strptime(tt[0], fmt).date() except ValueError as ve: raise ParseException(ss, ll, str(ve)) return cvt_fn @staticmethod def convert_to_datetime(fmt: str = "%Y-%m-%dT%H:%M:%S.%f"): """Helper to create a parse action for converting parsed datetime string to Python datetime.datetime Params - - fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%dT%H:%M:%S.%f"``) Example:: dt_expr = pyparsing_common.iso8601_datetime.copy() dt_expr.setParseAction(pyparsing_common.convertToDatetime()) print(dt_expr.parseString("1999-12-31T23:59:59.999")) prints:: [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)] """ def cvt_fn(s, l, t): try: return datetime.strptime(t[0], fmt) except ValueError as ve: raise ParseException(s, l, str(ve)) return cvt_fn iso8601_date = Regex( r"(?P\d{4})(?:-(?P\d\d)(?:-(?P\d\d))?)?" ).set_name("ISO8601 date") "ISO8601 date (``yyyy-mm-dd``)" iso8601_datetime = Regex( r"(?P\d{4})-(?P\d\d)-(?P\d\d)[T ](?P\d\d):(?P\d\d)(:(?P\d\d(\.\d*)?)?)?(?PZ|[+-]\d\d:?\d\d)?" ).set_name("ISO8601 datetime") "ISO8601 datetime (``yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)``) - trailing seconds, milliseconds, and timezone optional; accepts separating ``'T'`` or ``' '``" uuid = Regex(r"[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}").set_name("UUID") "UUID (``xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx``)" _html_stripper = any_open_tag.suppress() | any_close_tag.suppress() @staticmethod def strip_html_tags(s: str, l: int, tokens: ParseResults): """Parse action to remove HTML tags from web page HTML source Example:: # strip HTML links from normal text text = 'More info at the pyparsing wiki page' td, td_end = makeHTMLTags("TD") table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end print(table_text.parseString(text).body) Prints:: More info at the pyparsing wiki page """ return pyparsing_common._html_stripper.transform_string(tokens[0]) _commasepitem = ( Combine( OneOrMore( ~Literal(",") + ~LineEnd() + Word(printables, exclude_chars=",") + Opt(White(" \t") + ~FollowedBy(LineEnd() | ",")) ) ) .streamline() .set_name("commaItem") ) comma_separated_list = delimited_list( Opt(quoted_string.copy() | _commasepitem, default="") ).set_name("comma separated list") """Predefined expression of 1 or more printable words or quoted strings, separated by commas.""" upcase_tokens = staticmethod(token_map(lambda t: t.upper())) """Parse action to convert tokens to upper case.""" downcase_tokens = staticmethod(token_map(lambda t: t.lower())) """Parse action to convert tokens to lower case.""" # fmt: off url = Regex( # https://mathiasbynens.be/demo/url-regex # https://gist.github.com/dperini/729294 r"^" + # protocol identifier (optional) # short syntax // still required r"(?:(?:(?Phttps?|ftp):)?\/\/)" + # user:pass BasicAuth (optional) r"(?:(?P\S+(?::\S*)?)@)?" + r"(?P" + # IP address exclusion # private & local networks r"(?!(?:10|127)(?:\.\d{1,3}){3})" + r"(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})" + r"(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})" + # IP address dotted notation octets # excludes loopback network 0.0.0.0 # excludes reserved space >= 224.0.0.0 # excludes network & broadcast addresses # (first & last IP address of each class) r"(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])" + r"(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}" + r"(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))" + r"|" + # host & domain names, may end with dot # can be replaced by a shortest alternative # (?![-_])(?:[-\w\u00a1-\uffff]{0,63}[^-_]\.)+ r"(?:" + r"(?:" + r"[a-z0-9\u00a1-\uffff]" + r"[a-z0-9\u00a1-\uffff_-]{0,62}" + r")?" + r"[a-z0-9\u00a1-\uffff]\." + r")+" + # TLD identifier name, may end with dot r"(?:[a-z\u00a1-\uffff]{2,}\.?)" + r")" + # port number (optional) r"(:(?P\d{2,5}))?" + # resource path (optional) r"(?P\/[^?# ]*)?" + # query string (optional) r"(\?(?P[^#]*))?" + # fragment (optional) r"(#(?P\S*))?" + r"$" ).set_name("url") # fmt: on # pre-PEP8 compatibility names convertToInteger = convert_to_integer convertToFloat = convert_to_float convertToDate = convert_to_date convertToDatetime = convert_to_datetime stripHTMLTags = strip_html_tags upcaseTokens = upcase_tokens downcaseTokens = downcase_tokens _builtin_exprs = [ v for v in vars(pyparsing_common).values() if isinstance(v, ParserElement) ]