File size: 5,390 Bytes
8a6689a |
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 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 |
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
#
# From https://github.com/facebookresearch/cc_net/blob/main/cc_net/text_normalizer.py
import re
import unicodedata
UNICODE_PUNCT = {
",": ",",
"。": ".",
"、": ",",
"„": '"',
"”": '"',
"“": '"',
"«": '"',
"»": '"',
"1": '"',
"」": '"',
"「": '"',
"《": '"',
"》": '"',
"´": "'",
"∶": ":",
":": ":",
"?": "?",
"!": "!",
"(": "(",
")": ")",
";": ";",
"–": "-",
"—": " - ",
".": ". ",
"~": "~",
"’": "'",
"…": "...",
"━": "-",
"〈": "<",
"〉": ">",
"【": "[",
"】": "]",
"%": "%",
"►": "-",
}
UNICODE_PUNCT_RE = re.compile(f"[{''.join(UNICODE_PUNCT.keys())}]")
MATH_RE = r"(?<!\\)(\$\$?.+?\$\$?)"
CODE_RE = r'\`{1,3}.*?\`{1,3}'
def replace_unicode_punct(text: str) -> str:
return "".join((UNICODE_PUNCT.get(c, c) for c in text))
def remove_unicode_punct(text: str) -> str:
"""More aggressive version of replace_unicode_punct but also faster."""
return UNICODE_PUNCT_RE.sub("", text)
def strip_accents(line: str) -> str:
"""Strips accents from a piece of text."""
nfd = unicodedata.normalize("NFD", line)
output = [c for c in nfd if unicodedata.category(c) != "Mn"]
if len(output) == line:
return line
return "".join(output)
# Build a regex matching all control characters.
NON_PRINTING_CHARS_RE = re.compile(
f"[{''.join(map(chr, list(range(0,32)) + list(range(127,160))))}]"
)
DIGIT_RE = re.compile(r"\d")
PUNCT_OR_NON_PRINTING_CHARS_RE = re.compile(
(UNICODE_PUNCT_RE.pattern + NON_PRINTING_CHARS_RE.pattern).replace("][", "")
)
def remove_non_printing_char(text: str) -> str:
return NON_PRINTING_CHARS_RE.sub("", text)
def normalize_spacing_for_tok(text: str, language: str = "en") -> str:
res = (
text.replace("\r", "")
# remove extra spaces
.replace("(", " (")
.replace(")", ") ")
.replace(" +", " ")
)
res = re.sub(r"\) ([\.\!\:\?\;\,])", r"\)\1", res)
res = res.replace("( ", "(").replace(" )", ")")
res = re.sub(r"(\d) \%", r"\1\%", res)
res = res.replace(" :", ":").replace(" ;", ";")
res = res.replace("`", "'").replace("''", ' " ')
res = (
res.replace("„", '"')
.replace("“", '"')
.replace("”", '"')
.replace("–", "-")
.replace("—", " - ")
.replace(" +", " ")
.replace("´", "'")
.replace("([a-z])‘([a-z])", r"\1'\2/")
.replace("([a-z])’([a-z])", r"\1'\2/")
.replace("‘", '"')
.replace("‚", '"')
.replace("’", '"')
.replace("''", '"')
.replace("´´", '"')
.replace("…", "...")
# French quotes
.replace(" « ", ' "')
.replace("« ", '"')
.replace("«", '"')
.replace(" » ", '" ')
.replace(" »", '"')
.replace("»", '"')
# handle pseudo-spaces
.replace(" %", "%")
.replace("nº ", "nº ")
.replace(" :", ":")
.replace(" ºC", " ºC")
.replace(" cm", " cm")
.replace(" ?", "?")
.replace(" !", "!")
.replace(" ;", ";")
.replace(", ", ", ")
.replace(" +", " ")
.replace(".", ". ")
)
# English "quotation," followed by comma, style
if language == "en":
res = re.sub(r"\"([,\.]+)", r"\1\"", res)
# Czech is confused
elif language == "cs" or language == "cz":
pass
# German/Spanish/French "quotation", followed by comma, style
else:
res = res.replace(',"', '",')
res = re.sub(
r"(\.+)\"(\s*[^<])", r"\"\1\2", res
) # don't fix period at end of sentence
if (
language == "de"
or language == "es"
or language == "cz"
or language == "cs"
or language == "fr"
):
res = re.sub(r"(\d) (\d)", r"\1,\2", res)
else:
res = re.sub(r"(\d) (\d)", r"\1.\2", res)
return res
def normalize(line: str, accent=True, case=True, numbers=True, math=True, code=True, punct=1) -> str:
line = line.strip()
if not line:
return line
if case:
line = line.lower()
if accent:
line = strip_accents(line)
if numbers:
line = DIGIT_RE.sub("0", line)
if punct == 1:
line = replace_unicode_punct(line)
elif punct == 2:
line = remove_unicode_punct(line)
if math:
line = re.sub(MATH_RE, "[EQUATION]", line, flags=re.DOTALL)
if code:
line = re.sub(CODE_RE, "[CODE]", line, flags=re.DOTALL)
# Replace any <s> or </s> explicitly written in the text with nothing
line = line.replace("<s>", "").replace("</s>", "")
line = remove_non_printing_char(line)
return line
def slow_normalize_for_dedup(line: str) -> str:
return normalize(line, accent=False, case=True, numbers=True, punct=2)
def normalize_for_dedup(line: str) -> str:
line = line.strip()
if not line:
return line
# case
line = line.lower()
# numbers
line = DIGIT_RE.sub("0", line)
line = PUNCT_OR_NON_PRINTING_CHARS_RE.sub("", line)
return line |