largescale_segmentation.py
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# -*- coding: utf-8 -*-
from __future__ import print_function
from lxml import etree
import xml_utils
import os, sys
from nltk import tokenize
import srx_segmenter
import codecs
class LogicError(Exception):
pass
IGNORE_LACK_OF_IDS = True
# tymczasowo:
structure_path = ""
# tagi na ktorych otwieramy nowe akapity:
# dowolny tag w ramach front i back poza:
# pb
# figure
# note
# fw
#
# w body:
# head
# p
#
# latajace swobodnie cokolwiek tekstowego (poza zasiegiem powyzszych):
# figure
# fw
# note
# (zwykly tekst)
def get_string_value(element):
text = element.text or ''
for child in element:
text += get_string_value(child)
text += element.tail or ''
return text
def teins(x):
return "{%s}" % xml_utils.namespaces['tei']+x
def xmlns(x):
return "{%s}" % xml_utils.namespaces['xml']+x
def extract_tag(x):
return x[x.find("}")+1:]
def end_par(paras, cur_par):
if cur_par[0] and len(cur_par[0]) > 0:
paras[0].append(cur_par[0])
cur_par[0] = None
if len(paras[1]) > 0:
paras[0].extend(paras[1])
del paras[1][:]
if len(paras[1]) > 0:
raise LogicError("odwleczone akapity istnieja pomimo, ze nie ma aktualnego akapitu")
def id_or_none(elem, optional = False):
if not IGNORE_LACK_OF_IDS and not optional and xmlns("id") not in elem.attrib:
raise LogicError("brak xml:id w " + etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
return elem.attrib[xmlns("id")] if xmlns("id") in elem.attrib else None
def obtain_inner_text(elem, parentid, paras, cur_par, in_par, text_expected = True):
offset = 0
if elem.text:
if cur_par[0] is None:
if text_expected:
cur_par[0] = []
elif len(elem.text.strip()) > 0:
raise LogicError("niespodziewany tekst w " + etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
if cur_par[0] is not None:
cur_par[0].append({'id': parentid, 'text' : elem.text, 'xml_offset' : 0})
offset += len(elem.text)
for child in elem.iterchildren():
process_elt(child, paras, cur_par, in_par)
offset += len(get_string_value(child))
if child.tail:
if cur_par[0] is None:
if text_expected:
cur_par[0] = []
elif len(child.tail.strip()) > 0:
raise LogicError("niespodziewany tekst w " + etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
if cur_par[0] is not None:
cur_par[0].append({'id': parentid, 'text' : child.tail, 'xml_offset' : offset-len(child.tail)})
offset += len(child.tail)
def process_elt(elem, paras, cur_par, in_par = False):
#print("PE:", structure_path)
#print(etree.tostring(elem))
if elem.tag in [teins(x) for x in ("front", "body", "titlePage", "back", "div")]:
end_par(paras, cur_par)
for child in elem.iterchildren():
process_elt(child, paras, cur_par, in_par)
elif elem.tag in [teins(x) for x in ("p", "head", "docTitle", "docImprint", "docAuthor")]:
new_in_par = in_par
if not in_par:
end_par(paras, cur_par)
cur_par[0] = []
if elem.tag == teins("p"):
new_in_par = True
#elif elem.tag == teins("p"):
#print("plik:", structure_path)
#print(etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
obtain_inner_text(elem, id_or_none(elem), paras, cur_par, new_in_par)
if not in_par:
end_par(paras, cur_par)
elif elem.tag in [teins(x) for x in ("titlePart", "docDate")]:
obtain_inner_text(elem, id_or_none(elem), paras, cur_par, in_par)
elif elem.tag == teins('pb'):
pass
elif elem.tag == teins('foreign'):
if elem.text is None and len(list(elem.iterchildren())) == 0:
if xmlns("lang") in elem.attrib and elem.attrib[xmlns("lang")] == "x-nlws":
if cur_par[0] is not None:
cur_par[0].append({"text" : None, "id" : id_or_none(elem, True), "type" : "foreign/nonlatin"})
else:
if cur_par[0] is None:
raise LogicError("bledne foreign "+etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
# foreign lapiemy na boku a potem ustawiamy flage type dla calej zawartosci
aparas = ([],[])
acur_par = [[]]
obtain_inner_text(elem, id_or_none(elem), aparas, acur_par, in_par)
if len(aparas[0]) > 0:
raise LogicError("problem z foreign: zagniezdzony akapit? "+etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
for x in acur_par[0]:
if "type" not in x:
x["type"] = "foreign"
cur_par[0].append(x)
for adp in aparas[1]:
dp = []
for x in adp:
if "type" not in x:
x["type"] = "foreign"
dp.append(x)
paras[1].append(dp)
elif elem.tag == teins('choice'):
choices = list(elem.iterchildren())
if (elem.text and len(elem.text.strip()) > 0) or cur_par is None or len(choices) != 2:
raise LogicError("bledne choice "+etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
entry = {"text" : None, "orig_text" : None}
cur_par[0].append(entry)
for c in choices:
if c.tag == teins("orig"):
if entry["orig_text"]:
raise LogicError("bledne choice "+etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
entry["orig_text"] = c.text
entry["orig_id"] = id_or_none(elem)
elif c.tag == teins("reg"):
if entry["text"]:
raise LogicError("bledne choice "+etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
entry["text"] = c.text
entry["xml_offset"] = 0
entry["id"] = id_or_none(elem)
else:
raise LogicError("bledne choice "+etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
if (c.tail and len(c.tail.strip()) > 0) or len(list(c.iterchildren())) > 0:
raise LogicError("bledne choice "+etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
elif elem.tag == teins("fw"):
aparas = ([], [])
acur_par = [[]]
obtain_inner_text(elem, id_or_none(elem), aparas, acur_par, in_par)
if len(aparas[0]) > 0 or len(aparas[1]) > 0:
raise LogicError("bledny fw "+etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
# zywe paginy wyrzucam poza (za) aktualny akapit (jesli jestesmy w akapicie)
if cur_par[0] is not None:
paras[1].append(acur_par[0])
else:
paras[0].append(acur_par[0])
elif elem.tag == teins("note"):
aparas = ([], [])
acur_par = [[]]
obtain_inner_text(elem, id_or_none(elem, True), aparas, acur_par, in_par)
if xmlns("id") not in elem.attrib and not IGNORE_LACK_OF_IDS:
if len(acur_par[0]) > 0:
raise LogicError("bledne note " +etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
else:
if len(aparas[0]) > 0 or len(aparas[1]) > 0:
raise LogicError("bledne note "+etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
# notki wyrzucam poza (za) aktualny akapit (jesli jestesmy w akapicie)
if cur_par[0] is not None:
paras[1].append(acur_par[0])
else:
paras[0].append(acur_par[0])
elif elem.tag in [teins(x) for x in ["figure", "formula", "notatedMusic", "span"]]:
if cur_par[0] is None:
cur_par[0] = []
cur_par[0].append({"text" : None, "id" : id_or_none(elem, True), "type" : extract_tag(elem.tag)})
elif elem.tag == teins("g"):
entry = {"text" : u"¤", "id" : None, "type" : extract_tag(elem.tag), "xml_offset" : 0}
if cur_par[0] is not None:
cur_par[0].append(entry)
else:
paras[0].append([entry])
elif elem.tag == teins("gap"):
if cur_par[0] is None:
cur_par[0] = []
cur_par[0].append({"text" : None, "id" : None, "type" : extract_tag(elem.tag)})
elif elem.tag == teins('sic'):
if cur_par[0] is None:
raise LogicError("bledne sic "+etree.tostring(elem, encoding = "utf-8").decode("utf-8"))
obtain_inner_text(elem, id_or_none(elem), paras, cur_par, in_par)
def do_segmentation(plaintext):
srx_filepath = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'segment.srx')
rules = srx_segmenter.parse(srx_filepath)
segmenter = srx_segmenter.SrxSegmenter(rules["Polish"], plaintext)
sents, whitespaces = segmenter.extract()
#sents = tokenize.sent_tokenize(plaintext)
return sents
def make_sents(parafrags):
plaintext = u""
for f in parafrags:
start = len(plaintext)
if "text" in f and f["text"]:
plaintext += f["text"]
f["start"] = start
f["end"] = len(plaintext)
#print(repr(f))
#print
#print
sent_list = do_segmentation(plaintext)
plainpos = 0
sent_frags = []
last_frag = 0
for sent in sent_list:
sentpos = 0
if len(sent.strip()) > 0:
plainsent = sent.lstrip()
while plaintext[plainpos] != plainsent[sentpos] and len(plaintext[plainpos].strip()) == 0:
plainpos += 1
if plainpos > len(plaintext):
raise LogicError("tekst sie skonczyl przedwczesnie, "+str(plainpos)+", "+plaintext+", "+sentpos+". "+plainsent)
start = plainpos
while sentpos < len(plainsent):
if plainpos > len(plaintext):
raise LogicError("tekst sie skonczyl przedwczesnie, "+str(plainpos)+", "+plaintext+", "+sentpos+". "+plainsent)
if plaintext[plainpos] != plainsent[sentpos]:
raise LogicError("konflikt na tekscie, "+str(plainpos)+", "+plaintext+", "+sentpos+". "+plainsent)
sentpos += 1
plainpos += 1
end = plainpos
frags = []
while last_frag < len(parafrags) and parafrags[last_frag]["start"] <= end:
frg = parafrags[last_frag]
if frg["start"] >= start and frg["end"] <= end:
last_frag += 1
if "text" in frg:
frg["offset"] = 0
frags.append(frg)
elif frg["end"] <= end:
last_frag += 1
nfrg = {"text" : None}
if frg["text"]:
offset = start-frg["start"]
nfrg["text"] = frg["text"][offset:]
nfrg["offset"] = offset
if "orig_text" in frg:
nfrg["orig_text"] = frg["orig_text"][offset:l]
nfrg["id"] = frg["id"]
if "orig_id" in frg:
nfrg["orig_id"] = frg["orig_id"]
if "type" in frg:
nfrg["type"] = frg["type"]
if "xml_offset" in frg:
nfrg["xml_offset"] = frg["xml_offset"]
frags.append(nfrg)
else:
nfrg = {"text" : None}
if frg["text"]:
offset = 0 if frg["start"] >= start else start-frg["start"]
l = end-frg["start"]
nfrg["text"] = frg["text"][offset:l]
nfrg["offset"] = offset
if "orig_text" in frg:
nfrg["orig_text"] = frg["orig_text"][offset:l]
nfrg["id"] = frg["id"]
if "orig_id" in frg:
nfrg["orig_id"] = frg["orig_id"]
if "type" in frg:
nfrg["type"] = frg["type"]
if "xml_offset" in frg:
nfrg["xml_offset"] = frg["xml_offset"]
frags.append(nfrg)
break
if frags[-1]["text"] is not None and "offset" not in frags[-1]:
print(repr(frags[1]))
#print(plainsent)
sent_frags.append(frags)
#print(repr(frags))
#print
while last_frag < len(parafrags) and parafrags[last_frag]["text"]:
if len(parafrags[last_frag]["text"][end-parafrags[last_frag]["start"]:].strip()) == 0:
last_frag += 1
else:
break
if len(sent_frags) == 0 and len(parafrags) > 0:
sent_frags.append([])
if len(parafrags[last_frag:]) > 0:
sent_frags[-1].extend(parafrags[last_frag:])
filtered_frags = []
for s in sent_frags:
nf = []
for f in s:
if f["text"] is None or len(f["text"].strip()) > 0:
nf.append(f)
#print repr(f)
if f["text"] is not None and "offset" not in f:
print(repr(f))
raise LogicError("??")
if len(nf) > 0:
filtered_frags.append(nf)
return filtered_frags, sent_list
def parse_file(path):
global structure_path
print(path)
structure_path = os.path.join(unicode(path, "utf-8"), u'text_structure.xml')
text_tree = etree.parse(structure_path)
paras = ([], [])
cur_par = [None]
text = list(text_tree.xpath("tei:TEI/tei:text", namespaces=xml_utils.namespaces))
if len(text) != 1:
raise LogicError("bledne TEI\n\n" + str(text))
for elem in text[0].iterchildren():
process_elt(elem, paras, cur_par)
end_par(paras, cur_par)
parasents = []
paralist = []
for para in paras[0]:
paras, plainsents = make_sents(para)
parasents.append(paras)
paralist.append(plainsents)
# TODO tymczasowe wypluwanie zdan prostym tekstem na potrzeby inspekcji segmentacji zdaniowej
plaintext_path = os.path.join(unicode(path, "utf-8"), u'zdania.txt')
fo = codecs.open(plaintext_path, "w", encoding="utf-8")
for sent_list in paralist:
for s in sent_list:
print(s.strip()+u"\n", file = fo)
print(u"\n\n\n", file = fo)
fo.close()
return parasents