mirror of
https://git.mirrors.martin98.com/https://github.com/infiniflow/ragflow.git
synced 2025-05-23 21:19:44 +08:00
c6b6c748ae
### What problem does this PR solve? #651 ### Type of change - [x] Bug Fix (non-breaking change which fixes an issue)
392 lines
12 KiB
Python
392 lines
12 KiB
Python
import random
|
||
from collections import Counter
|
||
|
||
from rag.utils import num_tokens_from_string
|
||
from . import rag_tokenizer
|
||
import re
|
||
import copy
|
||
|
||
all_codecs = [
|
||
'utf-8', 'gb2312', 'gbk', 'utf_16', 'ascii', 'big5', 'big5hkscs',
|
||
'cp037', 'cp273', 'cp424', 'cp437',
|
||
'cp500', 'cp720', 'cp737', 'cp775', 'cp850', 'cp852', 'cp855', 'cp856', 'cp857',
|
||
'cp858', 'cp860', 'cp861', 'cp862', 'cp863', 'cp864', 'cp865', 'cp866', 'cp869',
|
||
'cp874', 'cp875', 'cp932', 'cp949', 'cp950', 'cp1006', 'cp1026', 'cp1125',
|
||
'cp1140', 'cp1250', 'cp1251', 'cp1252', 'cp1253', 'cp1254', 'cp1255', 'cp1256',
|
||
'cp1257', 'cp1258', 'euc_jp', 'euc_jis_2004', 'euc_jisx0213', 'euc_kr',
|
||
'gb2312', 'gb18030', 'hz', 'iso2022_jp', 'iso2022_jp_1', 'iso2022_jp_2',
|
||
'iso2022_jp_2004', 'iso2022_jp_3', 'iso2022_jp_ext', 'iso2022_kr', 'latin_1',
|
||
'iso8859_2', 'iso8859_3', 'iso8859_4', 'iso8859_5', 'iso8859_6', 'iso8859_7',
|
||
'iso8859_8', 'iso8859_9', 'iso8859_10', 'iso8859_11', 'iso8859_13',
|
||
'iso8859_14', 'iso8859_15', 'iso8859_16', 'johab', 'koi8_r', 'koi8_t', 'koi8_u',
|
||
'kz1048', 'mac_cyrillic', 'mac_greek', 'mac_iceland', 'mac_latin2', 'mac_roman',
|
||
'mac_turkish', 'ptcp154', 'shift_jis', 'shift_jis_2004', 'shift_jisx0213',
|
||
'utf_32', 'utf_32_be', 'utf_32_le''utf_16_be', 'utf_16_le', 'utf_7'
|
||
]
|
||
|
||
|
||
def find_codec(blob):
|
||
global all_codecs
|
||
for c in all_codecs:
|
||
try:
|
||
blob[:1024].decode(c)
|
||
return c
|
||
except Exception as e:
|
||
pass
|
||
try:
|
||
blob.decode(c)
|
||
return c
|
||
except Exception as e:
|
||
pass
|
||
|
||
return "utf-8"
|
||
|
||
|
||
BULLET_PATTERN = [[
|
||
r"第[零一二三四五六七八九十百0-9]+(分?编|部分)",
|
||
r"第[零一二三四五六七八九十百0-9]+章",
|
||
r"第[零一二三四五六七八九十百0-9]+节",
|
||
r"第[零一二三四五六七八九十百0-9]+条",
|
||
r"[\(（][零一二三四五六七八九十百]+[\)）]",
|
||
], [
|
||
r"第[0-9]+章",
|
||
r"第[0-9]+节",
|
||
r"[0-9]{,2}[\. 、]",
|
||
r"[0-9]{,2}\.[0-9]{,2}[^a-zA-Z/%~-]",
|
||
r"[0-9]{,2}\.[0-9]{,2}\.[0-9]{,2}",
|
||
r"[0-9]{,2}\.[0-9]{,2}\.[0-9]{,2}\.[0-9]{,2}",
|
||
], [
|
||
r"第[零一二三四五六七八九十百0-9]+章",
|
||
r"第[零一二三四五六七八九十百0-9]+节",
|
||
r"[零一二三四五六七八九十百]+[ 、]",
|
||
r"[\(（][零一二三四五六七八九十百]+[\)）]",
|
||
r"[\(（][0-9]{,2}[\)）]",
|
||
], [
|
||
r"PART (ONE|TWO|THREE|FOUR|FIVE|SIX|SEVEN|EIGHT|NINE|TEN)",
|
||
r"Chapter (I+V?|VI*|XI|IX|X)",
|
||
r"Section [0-9]+",
|
||
r"Article [0-9]+"
|
||
]
|
||
]
|
||
|
||
|
||
def random_choices(arr, k):
|
||
k = min(len(arr), k)
|
||
return random.choices(arr, k=k)
|
||
|
||
|
||
def not_bullet(line):
|
||
patt = [
|
||
r"0", r"[0-9]+ +[0-9~个只-]", r"[0-9]+\.{2,}"
|
||
]
|
||
return any([re.match(r, line) for r in patt])
|
||
|
||
|
||
def bullets_category(sections):
|
||
global BULLET_PATTERN
|
||
hits = [0] * len(BULLET_PATTERN)
|
||
for i, pro in enumerate(BULLET_PATTERN):
|
||
for sec in sections:
|
||
for p in pro:
|
||
if re.match(p, sec) and not not_bullet(sec):
|
||
hits[i] += 1
|
||
break
|
||
maxium = 0
|
||
res = -1
|
||
for i, h in enumerate(hits):
|
||
if h <= maxium:
|
||
continue
|
||
res = i
|
||
maxium = h
|
||
return res
|
||
|
||
|
||
def is_english(texts):
|
||
eng = 0
|
||
if not texts: return False
|
||
for t in texts:
|
||
if re.match(r"[a-zA-Z]{2,}", t.strip()):
|
||
eng += 1
|
||
if eng / len(texts) > 0.8:
|
||
return True
|
||
return False
|
||
|
||
|
||
def tokenize(d, t, eng):
|
||
d["content_with_weight"] = t
|
||
t = re.sub(r"</?(table|td|caption|tr|th)( [^<>]{0,12})?>", " ", t)
|
||
d["content_ltks"] = rag_tokenizer.tokenize(t)
|
||
d["content_sm_ltks"] = rag_tokenizer.fine_grained_tokenize(d["content_ltks"])
|
||
|
||
|
||
def tokenize_chunks(chunks, doc, eng, pdf_parser):
|
||
res = []
|
||
# wrap up as es documents
|
||
for ck in chunks:
|
||
if len(ck.strip()) == 0:continue
|
||
print("--", ck)
|
||
d = copy.deepcopy(doc)
|
||
if pdf_parser:
|
||
try:
|
||
d["image"], poss = pdf_parser.crop(ck, need_position=True)
|
||
add_positions(d, poss)
|
||
ck = pdf_parser.remove_tag(ck)
|
||
except NotImplementedError as e:
|
||
pass
|
||
tokenize(d, ck, eng)
|
||
res.append(d)
|
||
return res
|
||
|
||
|
||
def tokenize_table(tbls, doc, eng, batch_size=10):
|
||
res = []
|
||
# add tables
|
||
for (img, rows), poss in tbls:
|
||
if not rows:
|
||
continue
|
||
if isinstance(rows, str):
|
||
d = copy.deepcopy(doc)
|
||
tokenize(d, rows, eng)
|
||
d["content_with_weight"] = rows
|
||
if img: d["image"] = img
|
||
if poss: add_positions(d, poss)
|
||
res.append(d)
|
||
continue
|
||
de = "; " if eng else "； "
|
||
for i in range(0, len(rows), batch_size):
|
||
d = copy.deepcopy(doc)
|
||
r = de.join(rows[i:i + batch_size])
|
||
tokenize(d, r, eng)
|
||
d["image"] = img
|
||
add_positions(d, poss)
|
||
res.append(d)
|
||
return res
|
||
|
||
|
||
def add_positions(d, poss):
|
||
if not poss:
|
||
return
|
||
d["page_num_int"] = []
|
||
d["position_int"] = []
|
||
d["top_int"] = []
|
||
for pn, left, right, top, bottom in poss:
|
||
d["page_num_int"].append(int(pn + 1))
|
||
d["top_int"].append(int(top))
|
||
d["position_int"].append((int(pn + 1), int(left), int(right), int(top), int(bottom)))
|
||
|
||
|
||
def remove_contents_table(sections, eng=False):
|
||
i = 0
|
||
while i < len(sections):
|
||
def get(i):
|
||
nonlocal sections
|
||
return (sections[i] if isinstance(sections[i],
|
||
type("")) else sections[i][0]).strip()
|
||
|
||
if not re.match(r"(contents|目录|目次|table of contents|致谢|acknowledge)$",
|
||
re.sub(r"( | |\u3000)+", "", get(i).split("@@")[0], re.IGNORECASE)):
|
||
i += 1
|
||
continue
|
||
sections.pop(i)
|
||
if i >= len(sections):
|
||
break
|
||
prefix = get(i)[:3] if not eng else " ".join(get(i).split(" ")[:2])
|
||
while not prefix:
|
||
sections.pop(i)
|
||
if i >= len(sections):
|
||
break
|
||
prefix = get(i)[:3] if not eng else " ".join(get(i).split(" ")[:2])
|
||
sections.pop(i)
|
||
if i >= len(sections) or not prefix:
|
||
break
|
||
for j in range(i, min(i + 128, len(sections))):
|
||
if not re.match(prefix, get(j)):
|
||
continue
|
||
for _ in range(i, j):
|
||
sections.pop(i)
|
||
break
|
||
|
||
|
||
def make_colon_as_title(sections):
|
||
if not sections:
|
||
return []
|
||
if isinstance(sections[0], type("")):
|
||
return sections
|
||
i = 0
|
||
while i < len(sections):
|
||
txt, layout = sections[i]
|
||
i += 1
|
||
txt = txt.split("@")[0].strip()
|
||
if not txt:
|
||
continue
|
||
if txt[-1] not in ":：":
|
||
continue
|
||
txt = txt[::-1]
|
||
arr = re.split(r"([。？！!?;；]| .)", txt)
|
||
if len(arr) < 2 or len(arr[1]) < 32:
|
||
continue
|
||
sections.insert(i - 1, (arr[0][::-1], "title"))
|
||
i += 1
|
||
|
||
|
||
def title_frequency(bull, sections):
|
||
bullets_size = len(BULLET_PATTERN[bull])
|
||
levels = [bullets_size+1 for _ in range(len(sections))]
|
||
if not sections or bull < 0:
|
||
return bullets_size+1, levels
|
||
|
||
for i, (txt, layout) in enumerate(sections):
|
||
for j, p in enumerate(BULLET_PATTERN[bull]):
|
||
if re.match(p, txt.strip()) and not not_bullet(txt):
|
||
levels[i] = j
|
||
break
|
||
else:
|
||
if re.search(r"(title|head)", layout) and not not_title(txt.split("@")[0]):
|
||
levels[i] = bullets_size
|
||
most_level = bullets_size+1
|
||
for l, c in sorted(Counter(levels).items(), key=lambda x:x[1]*-1):
|
||
if l <= bullets_size:
|
||
most_level = l
|
||
break
|
||
return most_level, levels
|
||
|
||
|
||
def not_title(txt):
|
||
if re.match(r"第[零一二三四五六七八九十百0-9]+条", txt):
|
||
return False
|
||
if len(txt.split(" ")) > 12 or (txt.find(" ") < 0 and len(txt) >= 32):
|
||
return True
|
||
return re.search(r"[,;，。；！!]", txt)
|
||
|
||
|
||
def hierarchical_merge(bull, sections, depth):
|
||
if not sections or bull < 0:
|
||
return []
|
||
if isinstance(sections[0], type("")):
|
||
sections = [(s, "") for s in sections]
|
||
sections = [(t, o) for t, o in sections if
|
||
t and len(t.split("@")[0].strip()) > 1 and not re.match(r"[0-9]+$", t.split("@")[0].strip())]
|
||
bullets_size = len(BULLET_PATTERN[bull])
|
||
levels = [[] for _ in range(bullets_size + 2)]
|
||
|
||
|
||
for i, (txt, layout) in enumerate(sections):
|
||
for j, p in enumerate(BULLET_PATTERN[bull]):
|
||
if re.match(p, txt.strip()):
|
||
levels[j].append(i)
|
||
break
|
||
else:
|
||
if re.search(r"(title|head)", layout) and not not_title(txt):
|
||
levels[bullets_size].append(i)
|
||
else:
|
||
levels[bullets_size + 1].append(i)
|
||
sections = [t for t, _ in sections]
|
||
|
||
# for s in sections: print("--", s)
|
||
|
||
def binary_search(arr, target):
|
||
if not arr:
|
||
return -1
|
||
if target > arr[-1]:
|
||
return len(arr) - 1
|
||
if target < arr[0]:
|
||
return -1
|
||
s, e = 0, len(arr)
|
||
while e - s > 1:
|
||
i = (e + s) // 2
|
||
if target > arr[i]:
|
||
s = i
|
||
continue
|
||
elif target < arr[i]:
|
||
e = i
|
||
continue
|
||
else:
|
||
assert False
|
||
return s
|
||
|
||
cks = []
|
||
readed = [False] * len(sections)
|
||
levels = levels[::-1]
|
||
for i, arr in enumerate(levels[:depth]):
|
||
for j in arr:
|
||
if readed[j]:
|
||
continue
|
||
readed[j] = True
|
||
cks.append([j])
|
||
if i + 1 == len(levels) - 1:
|
||
continue
|
||
for ii in range(i + 1, len(levels)):
|
||
jj = binary_search(levels[ii], j)
|
||
if jj < 0:
|
||
continue
|
||
if jj > cks[-1][-1]:
|
||
cks[-1].pop(-1)
|
||
cks[-1].append(levels[ii][jj])
|
||
for ii in cks[-1]:
|
||
readed[ii] = True
|
||
|
||
if not cks:
|
||
return cks
|
||
|
||
for i in range(len(cks)):
|
||
cks[i] = [sections[j] for j in cks[i][::-1]]
|
||
print("--------------\n", "\n* ".join(cks[i]))
|
||
|
||
res = [[]]
|
||
num = [0]
|
||
for ck in cks:
|
||
if len(ck) == 1:
|
||
n = num_tokens_from_string(re.sub(r"@@[0-9]+.*", "", ck[0]))
|
||
if n + num[-1] < 218:
|
||
res[-1].append(ck[0])
|
||
num[-1] += n
|
||
continue
|
||
res.append(ck)
|
||
num.append(n)
|
||
continue
|
||
res.append(ck)
|
||
num.append(218)
|
||
|
||
return res
|
||
|
||
|
||
def naive_merge(sections, chunk_token_num=128, delimiter="\n。；！？"):
|
||
if not sections:
|
||
return []
|
||
if isinstance(sections[0], type("")):
|
||
sections = [(s, "") for s in sections]
|
||
cks = [""]
|
||
tk_nums = [0]
|
||
|
||
def add_chunk(t, pos):
|
||
nonlocal cks, tk_nums, delimiter
|
||
tnum = num_tokens_from_string(t)
|
||
if tnum < 8:
|
||
pos = ""
|
||
if tk_nums[-1] > chunk_token_num:
|
||
if t.find(pos) < 0:
|
||
t += pos
|
||
cks.append(t)
|
||
tk_nums.append(tnum)
|
||
else:
|
||
if cks[-1].find(pos) < 0:
|
||
t += pos
|
||
cks[-1] += t
|
||
tk_nums[-1] += tnum
|
||
|
||
for sec, pos in sections:
|
||
add_chunk(sec, pos)
|
||
continue
|
||
s, e = 0, 1
|
||
while e < len(sec):
|
||
if sec[e] in delimiter:
|
||
add_chunk(sec[s: e + 1], pos)
|
||
s = e + 1
|
||
e = s + 1
|
||
else:
|
||
e += 1
|
||
if s < e:
|
||
add_chunk(sec[s: e], pos)
|
||
|
||
return cks
|