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class InVehicleRegistrationRecognizer(PatternRecognizer):
"""
Recognizes Indian Vehicle Registration Number issued by RTO.
Reference(s):
https://en.wikipedia.org/wiki/Vehicle_registration_plates_of_India
https://en.wikipedia.org/wiki/Regional_Transport_Office
https://en.wikipedia.org/wiki/List_of_Regional_Transport_Office_districts_in_India
The registration scheme changed over time with multiple formats
in play over the years
India has multiple active patterns for registration plates issued to different
vehicle categories
:param patterns: List of patterns to be used by this recognizer
:param context: List of context words to increase confidence in detection
:param supported_language: Language this recognizer supports
:param supported_entity: The entity this recognizer can detect
:param replacement_pairs: List of tuples with potential replacement values
for different strings to be used during pattern matching.
This can allow a greater variety in input e.g. by removing dashes or spaces
"""
PATTERNS = [
Pattern(
"India Vehicle Registration (Very Weak)",
r"\b[A-Z]{1}(?!0000)[0-9]{4}\b",
0.01,
),
Pattern(
"India Vehicle Registration (Very Weak)",
r"\b[A-Z]{2}(?!0000)\d{4}\b",
0.01,
),
Pattern(
"India Vehicle Registration (Very Weak)",
r"\b(I)(?!00000)\d{5}\b",
0.01,
),
Pattern(
"India Vehicle Registration (Weak)",
r"\b[A-Z]{3}(?!0000)\d{4}\b",
0.20,
),
Pattern(
"India Vehicle Registration (Medium)",
r"\b\d{1,3}(CD|CC|UN)[1-9]{1}[0-9]{1,3}\b",
0.40,
),
Pattern(
"India Vehicle Registration",
r"\b[A-Z]{2}\d{1}[A-Z]{1,3}(?!0000)\d{4}\b",
0.50,
),
Pattern(
"India Vehicle Registration",
r"\b[A-Z]{2}\d{2}[A-Z]{1,2}(?!0000)\d{4}\b",
0.50,
),
Pattern(
"India Vehicle Registration",
r"\b[2-9]{1}[1-9]{1}(BH)(?!0000)\d{4}[A-HJ-NP-Z]{2}\b",
0.85,
),
Pattern(
"India Vehicle Registration",
r"\b(?!00)\d{2}(A|B|C|D|E|F|H|K|P|R|X)\d{6}[A-Z]{1}\b",
0.85,
),
]
CONTEXT = ["RTO", "vehicle", "plate", "registration"]
# fmt: off
in_vehicle_foreign_mission_codes = {
84, 85, 89, 93, 94, 95, 97, 98, 99, 102, 104, 105, 106, 109, 111, 112,
113, 117, 119, 120, 121, 122, 123, 125, 126, 128, 133, 134, 135, 137,
141, 145, 147, 149, 152, 153, 155, 156, 157, 159, 160
}
in_vehicle_armed_forces_codes = {
'A', 'B', 'C', 'D', 'E', 'F', 'H', 'K', 'P', 'R', 'X'}
in_vehicle_diplomatic_codes = {"CC", "CD", "UN"}
in_vehicle_dist_an = {"01"}
in_vehicle_dist_ap = {"39", "40"}
in_vehicle_dist_ar = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "19", "20", "22"
}
in_vehicle_dist_as = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31", "32", "33", "34"
}
in_vehicle_dist_br = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "19",
"21", "22", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33",
"34", "37", "38", "39", "43", "44", "45", "46", "50", "51", "52", "53",
"55", "56"
}
in_vehicle_dist_cg = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24",
"25", "26", "27", "28", "29", "30"
}
in_vehicle_dist_ch = {"01", "02", "03", "04"}
in_vehicle_dist_dd = {"01", "02", "03"}
in_vehicle_dist_dn = {"09"} # old list
in_vehicle_dist_dl = {
"1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13"}
in_vehicle_dist_ga = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12"}
in_vehicle_dist_gj = {
"1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13",
"14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37",
"38", "39"
}
in_vehicle_dist_hp = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37",
"38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49",
"50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60", "61",
"62", "63", "64", "65", "66", "67", "68", "69", "70", "71", "72", "73",
"74", "75", "76", "77", "78", "79", "80", "81", "82", "83", "84", "85",
"86", "87", "88", "89", "90", "91", "92", "93", "94", "95", "96", "97",
"98", "99"
}
in_vehicle_dist_hr = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37",
"38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49",
"50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60", "61",
"62", "63", "64", "65", "66", "67", "68", "69", "70", "71", "72", "73",
"74", "75", "76", "77", "78", "79", "80", "81", "82", "83", "84", "85",
"86", "87", "88", "89", "90", "91", "92", "93", "94", "95", "96", "97",
"98", "99"
}
in_vehicle_dist_jh = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24"
}
in_vehicle_dist_jk = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22"
}
in_vehicle_dist_ka = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37",
"38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49",
"50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60", "61",
"62", "63", "64", "65", "66", "67", "68", "69", "70", "71"
}
in_vehicle_dist_kl = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37",
"38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49",
"50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60", "61",
"62", "63", "64", "65", "66", "67", "68", "69", "70", "71", "72", "73",
"74", "75", "76", "77", "78", "79", "80", "81", "82", "83", "84", "85",
"86", "87", "88", "89", "90", "91", "92", "93", "94", "95", "96", "97",
"98", "99"
}
in_vehicle_dist_la = {"01", "02"}
in_vehicle_dist_ld = {"01", "02", "03", "04", "05", "06", "07", "08", "09"}
in_vehicle_dist_mh = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37",
"38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49",
"50", "51"
}
in_vehicle_dist_ml = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10"}
in_vehicle_dist_mn = {"01", "02", "03", "04", "05", "06", "07"}
in_vehicle_dist_mp = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37",
"38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49",
"50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60", "61",
"62", "63", "64", "65", "66", "67", "68", "69", "70", "71"
}
in_vehicle_dist_mz = {"01", "02", "03", "04", "05", "06", "07", "08"}
in_vehicle_dist_nl = {"01", "02", "03", "04", "05", "06", "07", "08", "09", "10"}
in_vehicle_dist_od = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31", "32", "33", "34", "35"
}
in_vehicle_dist_or = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31"
} # old list
in_vehicle_dist_pb = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37",
"38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49",
"50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60", "61",
"62", "63", "64", "65", "66", "67", "68", "69", "70", "71", "72", "73",
"74", "75", "76", "77", "78", "79", "80", "81", "82", "83", "84", "85",
"86", "87", "88", "89", "90", "91", "92", "93", "94", "95", "96", "97",
"98", "99"
}
in_vehicle_dist_py = {"01", "02", "03", "04", "05"}
in_vehicle_dist_rj = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37",
"38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49",
"50", "51", "52", "53", "54", "55", "56", "57", "58"
}
in_vehicle_dist_sk = {"01", "02", "03", "04", "05", "06", "07", "08"}
in_vehicle_dist_tn = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37",
"38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49",
"50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60", "61",
"62", "63", "64", "65", "66", "67", "68", "69", "70", "71", "72", "73",
"74", "75", "76", "77", "78", "79", "80", "81", "82", "83", "84", "85",
"86", "87", "88", "89", "90", "91", "92", "93", "94", "95", "96", "97",
"98", "99"
}
in_vehicle_dist_tr = {"01", "02", "03", "04", "05", "06", "07", "08"}
in_vehicle_dist_ts = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37",
"38"
}
in_vehicle_dist_uk = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20"
}
in_vehicle_dist_up = {
"11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "22", "23",
"24", "25", "26", "27", "28", "29", "30", "31", "32", "33", "34", "35",
"36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46", "47",
"48", "49", "50", "51", "52", "53", "54", "55", "56", "57", "58", "59",
"60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "70", "71",
"72", "73", "74", "75", "76", "77", "78", "79", "80", "81", "82", "83",
"84", "85", "86", "87", "88", "89", "90", "91", "92", "93", "94", "95",
"96"
}
in_vehicle_dist_wb = {
"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "22", "23", "24", "25",
"26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37",
"38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49",
"50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "60", "61",
"62", "63", "64", "65", "66", "67", "68", "69", "70", "71", "72", "73",
"74", "75", "76", "77", "78", "79", "80", "81", "82", "83", "84", "85",
"86", "87", "88", "89", "90", "91", "92", "93", "94", "95", "96", "97",
"98"
}
in_union_territories = {"AN", "CH", "DH", "DL", "JK", "LA", "LD", "PY"}
in_old_union_territories = {"CT", "DN"}
in_states = {
"AP", "AR", "AS", "BR", "CG", "GA", "GJ", "HR", "HP", "JH", "KA", "KL",
"MP", "MH", "MN", "ML", "MZ", "NL", "OD", "PB", "RJ", "SK", "TN", "TS",
"TR", "UP", "UK", "WB", "UT"
}
in_old_states = {"UL", "OR", "UA"}
in_non_standard_state_or_ut = {"DD"}
state_rto_district_map = {
"AN": in_vehicle_dist_an,
"AP": in_vehicle_dist_ap,
"AR": in_vehicle_dist_ar,
"AS": in_vehicle_dist_as,
"BR": in_vehicle_dist_br,
"CG": in_vehicle_dist_cg,
"CH": in_vehicle_dist_ch,
"DD": in_vehicle_dist_dd,
"DN": in_vehicle_dist_dn,
"DL": in_vehicle_dist_dl,
"GA": in_vehicle_dist_ga,
"GJ": in_vehicle_dist_gj,
"HP": in_vehicle_dist_hp,
"HR": in_vehicle_dist_hr,
"JH": in_vehicle_dist_jh,
"JK": in_vehicle_dist_jk,
"KA": in_vehicle_dist_ka,
"KL": in_vehicle_dist_kl,
"LA": in_vehicle_dist_la,
"LD": in_vehicle_dist_ld,
"MH": in_vehicle_dist_mh,
"ML": in_vehicle_dist_ml,
"MN": in_vehicle_dist_mn,
"MP": in_vehicle_dist_mp,
"MZ": in_vehicle_dist_mz,
"NL": in_vehicle_dist_nl,
"OD": in_vehicle_dist_od,
"OR": in_vehicle_dist_or,
"PB": in_vehicle_dist_pb,
"PY": in_vehicle_dist_py,
"RJ": in_vehicle_dist_rj,
"SK": in_vehicle_dist_sk,
"TN": in_vehicle_dist_tn,
"TR": in_vehicle_dist_tr,
"TS": in_vehicle_dist_ts,
"UK": in_vehicle_dist_uk,
"UP": in_vehicle_dist_up,
"WB": in_vehicle_dist_wb,
}
two_factor_registration_prefix = set()
two_factor_registration_prefix |= in_union_territories
two_factor_registration_prefix |= in_states
two_factor_registration_prefix |= in_old_states
two_factor_registration_prefix |= in_old_union_territories
two_factor_registration_prefix |= in_non_standard_state_or_ut
# fmt: on
def __init__(
self,
patterns: Optional[List[Pattern]] = None,
context: Optional[List[str]] = None,
supported_language: str = "en",
supported_entity: str = "IN_VEHICLE_REGISTRATION",
replacement_pairs: Optional[List[Tuple[str, str]]] = None,
):
self.replacement_pairs = (
replacement_pairs
if replacement_pairs
else [("-", ""), (" ", ""), (":", "")]
)
patterns = patterns if patterns else self.PATTERNS
context = context if context else self.CONTEXT
super().__init__(
supported_entity=supported_entity,
patterns=patterns,
context=context,
supported_language=supported_language,
)
def validate_result(self, pattern_text: str) -> bool:
"""Determine absolute value based on calculation."""
sanitized_value = EntityRecognizer.sanitize_value(
pattern_text, self.replacement_pairs
)
return self.__check_vehicle_registration(sanitized_value)
def __check_vehicle_registration(self, sanitized_value: str) -> bool:
# print('check function called')
is_valid_registration = None # deliberately not typecasted or set to bool False
# logic here
if len(sanitized_value) >= 8:
first_two_char = sanitized_value[:2].upper()
dist_code: str = ""
if first_two_char in self.two_factor_registration_prefix:
if sanitized_value[2].isdigit():
if sanitized_value[3].isdigit():
dist_code = sanitized_value[2:4]
else:
dist_code = sanitized_value[2:3]
registration_digits = sanitized_value[-4:]
if registration_digits.isnumeric():
if 0 < int(registration_digits) <= 9999:
if (
dist_code
and dist_code
in self.state_rto_district_map.get(first_two_char, "")
):
is_valid_registration = True
for diplomatic_vehicle_code in self.in_vehicle_diplomatic_codes:
if diplomatic_vehicle_code in sanitized_value:
vehicle_prefix = sanitized_value.partition(
diplomatic_vehicle_code
)[0]
if vehicle_prefix.isnumeric() and (
1 <= int(vehicle_prefix) <= 80
or int(vehicle_prefix)
in self.in_vehicle_foreign_mission_codes
):
is_valid_registration = True
return is_valid_registration
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