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opt / alt / python312 / lib / python3.12 / site-packages / pip / _vendor / pyparsing /

?? ..
?? __init__.py(8.9 KB)
?? __pycache__
?? actions.py(6.41 KB)
?? common.py(13.07 KB)
?? core.py(219.18 KB)
?? diagram
?? exceptions.py(9.3 KB)
?? helpers.py(37.74 KB)
?? py.typed(0 B)
?? results.py(26.07 KB)
?? testing.py(13.17 KB)
?? unicode.py(10.4 KB)
?? util.py(8.47 KB)

Editing: common.py

# common.py
from .core import *
from .helpers import DelimitedList, 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<integer>`, :class:`reals<real>`,
      :class:`scientific notation<sci_real>`)
    - common :class:`programming identifiers<identifier>`
    - network addresses (:class:`MAC<mac_address>`,
      :class:`IPv4<ipv4_address>`, :class:`IPv6<ipv6_address>`)
    - ISO8601 :class:`dates<iso8601_date>` and
      :class:`datetime<iso8601_datetime>`
    - :class:`UUID<uuid>`
    - :class:`comma-separated list<comma_separated_list>`
    - :class:`url`

Parse actions:

- :class:`convert_to_integer`
    - :class:`convert_to_float`
    - :class:`convert_to_date`
    - :class:`convert_to_datetime`
    - :class:`strip_html_tags`
    - :class:`upcase_tokens`
    - :class:`downcase_tokens`

Example::

pyparsing_common.number.run_tests('''
            # any int or real number, returned as the appropriate type
            100
            -100
            +100
            3.14159
            6.02e23
            1e-12
            ''')

pyparsing_common.fnumber.run_tests('''
            # any int or real number, returned as float
            100
            -100
            +100
            3.14159
            6.02e23
            1e-12
            ''')

pyparsing_common.hex_integer.run_tests('''
            # hex numbers
            100
            FF
            ''')

pyparsing_common.fraction.run_tests('''
            # fractions
            1/2
            -3/4
            ''')

pyparsing_common.mixed_integer.run_tests('''
            # mixed fractions
            1
            1/2
            -3/4
            1-3/4
            ''')

import uuid
        pyparsing_common.uuid.set_parse_action(token_map(uuid.UUID))
        pyparsing_common.uuid.run_tests('''
            # 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.set_parse_action(pyparsing_common.convert_to_date())
            print(date_expr.parse_string("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.set_parse_action(pyparsing_common.convert_to_datetime())
            print(dt_expr.parse_string("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<year>\d{4})(?:-(?P<month>\d\d)(?:-(?P<day>\d\d))?)?"
    ).set_name("ISO8601 date")
    "ISO8601 date (``yyyy-mm-dd``)"

iso8601_datetime = Regex(
        r"(?P<year>\d{4})-(?P<month>\d\d)-(?P<day>\d\d)[T ](?P<hour>\d\d):(?P<minute>\d\d)(:(?P<second>\d\d(\.\d*)?)?)?(?P<tz>Z|[+-]\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 = '<td>More info at the <a href="https://github.com/pyparsing/pyparsing/wiki">pyparsing</a> wiki page</td>'
            td, td_end = make_html_tags("TD")
            table_text = td + SkipTo(td_end).set_parse_action(pyparsing_common.strip_html_tags)("body") + td_end
            print(table_text.parse_string(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 = DelimitedList(
        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"(?P<url>" +
        # protocol identifier (optional)
        # short syntax // still required
        r"(?:(?:(?P<scheme>https?|ftp):)?\/\/)" +
        # user:pass BasicAuth (optional)
        r"(?:(?P<auth>\S+(?::\S*)?)@)?" +
        r"(?P<host>" +
        # 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<port>\d{2,5}))?" +
        # resource path (optional)
        r"(?P<path>\/[^?# ]*)?" +
        # query string (optional)
        r"(\?(?P<query>[^#]*))?" +
        # fragment (optional)
        r"(#(?P<fragment>\S*))?" +
        r")"
    ).set_name("url")
    """URL (http/https/ftp scheme)"""
    # fmt: on

# pre-PEP8 compatibility names
    convertToInteger = convert_to_integer
    """Deprecated - use :class:`convert_to_integer`"""
    convertToFloat = convert_to_float
    """Deprecated - use :class:`convert_to_float`"""
    convertToDate = convert_to_date
    """Deprecated - use :class:`convert_to_date`"""
    convertToDatetime = convert_to_datetime
    """Deprecated - use :class:`convert_to_datetime`"""
    stripHTMLTags = strip_html_tags
    """Deprecated - use :class:`strip_html_tags`"""
    upcaseTokens = upcase_tokens
    """Deprecated - use :class:`upcase_tokens`"""
    downcaseTokens = downcase_tokens
    """Deprecated - use :class:`downcase_tokens`"""

_builtin_exprs = [
    v for v in vars(pyparsing_common).values() if isinstance(v, ParserElement)
]

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