/
get_wikinews.py
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/
get_wikinews.py
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import urllib.request, bz2, io, os, sys, re, shutil
# from dateparser.search import search_dates # This one is worse than datefinder
from datefinder import find_dates # Maybe try sutime instead? (but needs Java)
from collections import OrderedDict
from multiprocessing import cpu_count
from glob import glob
from random import shuffle, seed
from lib.WikiExtractor import process_dump
seed(42)
script_dir = os.path.dirname(os.path.realpath(__file__)) + os.sep
class Document:
def __init__(self):
self.title = ""
self.text = ""
self.url = ""
self.lines = []
self.docnum = 0
def serialize(self, out_dir=None):
if out_dir is None:
out_dir = script_dir + "out" + os.sep + "wikinews" + os.sep
docname = 'autogum_wikinews_doc' + str(self.docnum)
# TODO: more metadata
header = '<text id="' + docname + '" title="' + self.title + '">\n'
output = header + self.text.strip() + "\n</text>\n"
with io.open(out_dir + docname + ".xml", 'w', encoding="utf8", newline="\n") as f:
f.write(output)
def get_dump(dump_file="enwikinews-latest-pages-articles.xml"):
"""Downloads dump file"""
dump_url = "https://dumps.wikimedia.org/enwikinews/latest/enwikinews-latest-pages-articles.xml.bz2"
req = urllib.request.urlopen(dump_url)
CHUNK = 16 * 1024
decompressor = bz2.BZ2Decompressor()
with io.open(dump_file, 'wb') as fp:
while True:
chunk = req.read(CHUNK)
if not chunk:
break
fp.write(decompressor.decompress(chunk))
req.close()
def reformat_text(text):
def leap(year):
year = int(year)
if year % 4 > 0:
return False
elif year % 100 > 0:
return True
elif year % 400 > 0:
return False
else:
return True
# Remove XML except hyperlinks and headings
text = text.replace(">",">").replace("<", "<").replace("&", "&").replace(" ", " ")
text = re.sub(r"<(/a|a [^<>]*)>",r"#@Q\1Q@#", text)
text = re.sub(r"<(/?h[0-9])>", r"#@Q\1Q@#", text)
text = re.sub('<[^<>]+>', '', text)
text = text.replace("#@Q", "<").replace("Q@#", ">")
# Mark up
text = re.sub(r'<h[0-9]>([^\n<>]+)</h[0-9]>', r"<head>\1</head>", text)
text = re.sub(r'(<a href)', r"<ref target", text)
text = re.sub(r'(target="[^"]+)%3A', r"\1:", text)
text = re.sub(r'(</?)a([ >])', r"\1ref\2", text)
text = re.sub(r'BULLET::::-?([^\n]+)', r"<item>\1</item>", text)
text = re.sub(r'^([^<\s][^\n]*)$', r'<p>\1</p>', text,flags=re.MULTILINE)
text = re.sub(r'♡❤♡([^❤♡]+)♡❤♡', r'<hi rend="bold">\1</hi>', text)
text = re.sub(r'♡❤([^❤♡]+)♡❤', r'<hi rend="italic">\1</hi>', text)
text = re.sub(r' +', r" ", text)
pats = [(r'((<item>.*?</item>\n?)+)', r'<list type="unordered">\n\1</list>\n')]
text = text.replace(""", '"')
for pat in pats:
text = re.sub(pat[0], pat[1], text, flags=re.MULTILINE|re.DOTALL)
# dates = find_dates(text, source=True, strict=True) # Non-strict finds garbage
# unique_dates = set([])
# if dates is not None:
# for d in dates:
# date_spec, date_text = d
# if len(date_text) < 4:
# continue
# year, month, day = date_spec.year, date_spec.month, date_spec.day
# if year == 0:
# year = "xxxx"
# else:
# year = str(year)
# if month == 0 and day == 0:
# when = '<date when="'+year+'">'
# unique_dates.add((date_text, when))
# continue
# elif month == 0:
# continue
# month = str(month)
# if len(month) == 1:
# month = "0" + month
# if day == 0:
# start = year + "-" + month + "-01"
# end = "31" if month in ["01","03","05","07","08","10","12"] else "30"
# if month == "02":
# if leap(year):
# end = "29"
# else:
# end = "28"
# end = year + "-" + month + "-" + end
# when = '<date notBefore="'+start+'" notAfter="' + end + '">'
# else: # Full date
# day = str(day)
# if len(day) == 1:
# day = "0"+day
# when = '<date when="' + year + "-" + month + "-" + day + '">'
# unique_dates.add((date_text,when))
# for t, d in unique_dates:
# text = text.replace(t, d+t+"</date>")
return text
if __name__ == "__main__":
dump_file = "enwikinews-latest-pages-articles.xml"
if not os.path.exists(script_dir + dump_file):
sys.stderr.write("o Downloading data\n")
get_dump(dump_file)
else:
sys.stderr.write("o Found cached download data\n")
if not os.path.exists(script_dir + "data"):
os.mkdir(script_dir + "data")
if not os.path.exists(script_dir + "data" + os.sep + "wikinews"):
os.mkdir(script_dir + "data" + os.sep + "wikinews")
# Set file size for WikiExtractor output
file_size = "1M"
power = 'kmg'.find(file_size[-1].lower()) + 1
file_size = int(file_size[:-1]) * 1024 ** power
# Get Wiki content
if not os.path.exists(script_dir + "data" + os.sep + "wikinews" + os.sep + "AA"):
sys.stderr.write("o Extracting data with WikiExtractor\n")
template_file = script_dir + "lib" + os.sep + "wikinews_templ.txt"
default_process_count = max(1, cpu_count() - 1)
default_process_count = 1
# If templates file does not exist yet, this will start a LONG pass of all data to harvest templates, then run
# the extraction
from types import SimpleNamespace
options = SimpleNamespace(toHTML=True, keepLists=True)
process_dump(script_dir+dump_file, template_file, script_dir + "data" + os.sep + "wikinews" + os.sep, file_size,
False, default_process_count)
else:
sys.stderr.write("o Found processed files in data" + os.sep + "wikinews" + os.sep + "AA\n")
# Sample documents from 50 randomly selected files
all_docs = []
files = glob(script_dir + "data" + os.sep + "wikinews" + os.sep + "**" + os.sep + "wiki*", recursive=True)
# shuffle(files)
files = files[:1]
for file_ in files:
docs = io.open(file_, encoding="utf8").read().split("</doc>")
for doc in docs:
if "<doc" not in doc:
continue
current_doc = Document()
m = re.search('<doc id="([^"]*)" url="([^"]*)" title="([^"]*)"', doc)
current_doc.url = m.group(2)
current_doc.title = m.group(3)
text = re.sub('<doc[^<>]*?>', '', doc)
text = reformat_text(text)
current_doc.text = text
all_docs.append(current_doc)
if not os.path.exists(script_dir + "out"):
os.mkdir(script_dir + "out")
if not os.path.exists(script_dir + "out" + os.sep + "wikinews"):
os.mkdir(script_dir + "out" + os.sep + "wikinews")
else:
shutil.rmtree(script_dir + "out" + os.sep + "wikinews")
os.mkdir(script_dir + "out" + os.sep + "wikinews")
out_dir = script_dir + "out" + os.sep + "wikinews" + os.sep
for i, doc in enumerate(all_docs):
doc.docnum = i
doc.serialize(out_dir)
sys.stdout.write("\no Wrote " + str(len(all_docs)) + " documents\n")