/usr/lib/python2.7/dist-packages/imdb/parser/http/utils.py is in python-imdbpy 4.8.2-1.
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The actual contents of the file can be viewed below.
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parser.http.utils module (imdb package).
This module provides miscellaneous utilities used by
the imdb.parser.http classes.
Copyright 2004-2011 Davide Alberani <da@erlug.linux.it>
2008 H. Turgut Uyar <uyar@tekir.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
import re
import logging
import warnings
from imdb._exceptions import IMDbError
from imdb.utils import flatten, _Container
from imdb.Movie import Movie
from imdb.Person import Person
from imdb.Character import Character
# Year, imdbIndex and kind.
re_yearKind_index = re.compile(r'(\([0-9\?]{4}(?:/[IVXLCDM]+)?\)(?: \(mini\)| \(TV\)| \(V\)| \(VG\))?)')
# Match imdb ids in href tags
re_imdbid = re.compile(r'(title/tt|name/nm|character/ch|company/co)([0-9]+)')
def analyze_imdbid(href):
"""Return an imdbID from an URL."""
if not href:
return None
match = re_imdbid.search(href)
if not match:
return None
return str(match.group(2))
_modify_keys = list(Movie.keys_tomodify_list) + list(Person.keys_tomodify_list)
def _putRefs(d, re_titles, re_names, re_characters, lastKey=None):
"""Iterate over the strings inside list items or dictionary values,
substitutes movie titles and person names with the (qv) references."""
if isinstance(d, list):
for i in xrange(len(d)):
if isinstance(d[i], (unicode, str)):
if lastKey in _modify_keys:
if re_names:
d[i] = re_names.sub(ur"'\1' (qv)", d[i])
if re_titles:
d[i] = re_titles.sub(ur'_\1_ (qv)', d[i])
if re_characters:
d[i] = re_characters.sub(ur'#\1# (qv)', d[i])
elif isinstance(d[i], (list, dict)):
_putRefs(d[i], re_titles, re_names, re_characters,
lastKey=lastKey)
elif isinstance(d, dict):
for k, v in d.items():
lastKey = k
if isinstance(v, (unicode, str)):
if lastKey in _modify_keys:
if re_names:
d[k] = re_names.sub(ur"'\1' (qv)", v)
if re_titles:
d[k] = re_titles.sub(ur'_\1_ (qv)', v)
if re_characters:
d[k] = re_characters.sub(ur'#\1# (qv)', v)
elif isinstance(v, (list, dict)):
_putRefs(d[k], re_titles, re_names, re_characters,
lastKey=lastKey)
# Handle HTML/XML/SGML entities.
from htmlentitydefs import entitydefs
entitydefs = entitydefs.copy()
entitydefsget = entitydefs.get
entitydefs['nbsp'] = ' '
sgmlentity = {'lt': '<', 'gt': '>', 'amp': '&', 'quot': '"', 'apos': '\'', 'ndash': '-'}
sgmlentityget = sgmlentity.get
_sgmlentkeys = sgmlentity.keys()
entcharrefs = {}
entcharrefsget = entcharrefs.get
for _k, _v in entitydefs.items():
if _k in _sgmlentkeys: continue
if _v[0:2] == '&#':
dec_code = _v[1:-1]
_v = unichr(int(_v[2:-1]))
entcharrefs[dec_code] = _v
else:
dec_code = '#' + str(ord(_v))
_v = unicode(_v, 'latin_1', 'replace')
entcharrefs[dec_code] = _v
entcharrefs[_k] = _v
del _sgmlentkeys, _k, _v
entcharrefs['#160'] = u' '
entcharrefs['#xA0'] = u' '
entcharrefs['#xa0'] = u' '
entcharrefs['#XA0'] = u' '
entcharrefs['#x22'] = u'"'
entcharrefs['#X22'] = u'"'
# convert &x26; to &, to make BeautifulSoup happy; beware that this
# leaves lone '&' in the html broken, but I assume this is better than
# the contrary...
entcharrefs['#38'] = u'&'
entcharrefs['#x26'] = u'&'
entcharrefs['#x26'] = u'&'
re_entcharrefs = re.compile('&(%s|\#160|\#\d{1,5}|\#x[0-9a-f]{1,4});' %
'|'.join(map(re.escape, entcharrefs)), re.I)
re_entcharrefssub = re_entcharrefs.sub
sgmlentity.update(dict([('#34', u'"'), ('#38', u'&'),
('#60', u'<'), ('#62', u'>'), ('#39', u"'")]))
re_sgmlref = re.compile('&(%s);' % '|'.join(map(re.escape, sgmlentity)))
re_sgmlrefsub = re_sgmlref.sub
# Matches XML-only single tags, like <br/> ; they are invalid in HTML,
# but widely used by IMDb web site. :-/
re_xmltags = re.compile('<([a-zA-Z]+)/>')
def _replXMLRef(match):
"""Replace the matched XML/HTML entities and references;
replace everything except sgml entities like <, >, ..."""
ref = match.group(1)
value = entcharrefsget(ref)
if value is None:
if ref[0] == '#':
ref_code = ref[1:]
if ref_code in ('34', '38', '60', '62', '39'):
return match.group(0)
elif ref_code[0].lower() == 'x':
#if ref[2:] == '26':
# # Don't convert &x26; to &, to make BeautifulSoup happy.
# return '&'
return unichr(int(ref[2:], 16))
else:
return unichr(int(ref[1:]))
else:
return ref
return value
def subXMLRefs(s):
"""Return the given html string with entity and char references
replaced."""
return re_entcharrefssub(_replXMLRef, s)
# XXX: no more used here; move it to mobile (they are imported by helpers, too)?
def _replSGMLRefs(match):
"""Replace the matched SGML entity."""
ref = match.group(1)
return sgmlentityget(ref, ref)
def subSGMLRefs(s):
"""Return the given html string with sgml entity and char references
replaced."""
return re_sgmlrefsub(_replSGMLRefs, s)
_b_p_logger = logging.getLogger('imdbpy.parser.http.build_person')
def build_person(txt, personID=None, billingPos=None,
roleID=None, accessSystem='http', modFunct=None):
"""Return a Person instance from the tipical <tr>...</tr> strings
found in the IMDb's web site."""
#if personID is None
# _b_p_logger.debug('empty name or personID for "%s"', txt)
notes = u''
role = u''
# Search the (optional) separator between name and role/notes.
if txt.find('....') != -1:
sep = '....'
elif txt.find('...') != -1:
sep = '...'
else:
sep = '...'
# Replace the first parenthesis, assuming there are only
# notes, after.
# Rationale: no imdbIndex is (ever?) showed on the web site.
txt = txt.replace('(', '...(', 1)
txt_split = txt.split(sep, 1)
name = txt_split[0].strip()
if len(txt_split) == 2:
role_comment = txt_split[1].strip()
# Strip common endings.
if role_comment[-4:] == ' and':
role_comment = role_comment[:-4].rstrip()
elif role_comment[-2:] == ' &':
role_comment = role_comment[:-2].rstrip()
elif role_comment[-6:] == '& ....':
role_comment = role_comment[:-6].rstrip()
# Get the notes.
if roleID is not None:
if not isinstance(roleID, list):
cmt_idx = role_comment.find('(')
if cmt_idx != -1:
role = role_comment[:cmt_idx].rstrip()
notes = role_comment[cmt_idx:]
else:
# Just a role, without notes.
role = role_comment
else:
role = role_comment
else:
# We're managing something that doesn't have a 'role', so
# everything are notes.
notes = role_comment
if role == '....': role = u''
roleNotes = []
# Manages multiple roleIDs.
if isinstance(roleID, list):
rolesplit = role.split('/')
role = []
for r in rolesplit:
nidx = r.find('(')
if nidx != -1:
role.append(r[:nidx].rstrip())
roleNotes.append(r[nidx:])
else:
role.append(r)
roleNotes.append(None)
lr = len(role)
lrid = len(roleID)
if lr > lrid:
roleID += [None] * (lrid - lr)
elif lr < lrid:
roleID = roleID[:lr]
for i, rid in enumerate(roleID):
if rid is not None:
roleID[i] = str(rid)
if lr == 1:
role = role[0]
roleID = roleID[0]
notes = roleNotes[0] or u''
elif roleID is not None:
roleID = str(roleID)
if personID is not None:
personID = str(personID)
if (not name) or (personID is None):
# Set to 'debug', since build_person is expected to receive some crap.
_b_p_logger.debug('empty name or personID for "%s"', txt)
# XXX: return None if something strange is detected?
person = Person(name=name, personID=personID, currentRole=role,
roleID=roleID, notes=notes, billingPos=billingPos,
modFunct=modFunct, accessSystem=accessSystem)
if roleNotes and len(roleNotes) == len(roleID):
for idx, role in enumerate(person.currentRole):
if roleNotes[idx]:
role.notes = roleNotes[idx]
return person
_re_chrIDs = re.compile('[0-9]{7}')
_b_m_logger = logging.getLogger('imdbpy.parser.http.build_movie')
# To shrink spaces.
re_spaces = re.compile(r'\s+')
def build_movie(txt, movieID=None, roleID=None, status=None,
accessSystem='http', modFunct=None, _parsingCharacter=False,
_parsingCompany=False, year=None, chrRoles=None,
rolesNoChar=None, additionalNotes=None):
"""Given a string as normally seen on the "categorized" page of
a person on the IMDb's web site, returns a Movie instance."""
# FIXME: Oook, lets face it: build_movie and build_person are now
# two horrible sets of patches to support the new IMDb design. They
# must be rewritten from scratch.
if _parsingCharacter:
_defSep = ' Played by '
elif _parsingCompany:
_defSep = ' ... '
else:
_defSep = ' .... '
title = re_spaces.sub(' ', txt).strip()
# Split the role/notes from the movie title.
tsplit = title.split(_defSep, 1)
role = u''
notes = u''
roleNotes = []
if len(tsplit) == 2:
title = tsplit[0].rstrip()
role = tsplit[1].lstrip()
if title[-9:] == 'TV Series':
title = title[:-9].rstrip()
#elif title[-7:] == '(short)':
# title = title[:-7].rstrip()
#elif title[-11:] == '(TV series)':
# title = title[:-11].rstrip()
#elif title[-10:] == '(TV movie)':
# title = title[:-10].rstrip()
elif title[-14:] == 'TV mini-series':
title = title[:-14] + ' (mini)'
if title and title.endswith(_defSep.rstrip()):
title = title[:-len(_defSep)+1]
# Try to understand where the movie title ends.
while True:
if year:
break
if title[-1:] != ')':
# Ignore the silly "TV Series" notice.
if title[-9:] == 'TV Series':
title = title[:-9].rstrip()
continue
else:
# Just a title: stop here.
break
# Try to match paired parentheses; yes: sometimes there are
# parentheses inside comments...
nidx = title.rfind('(')
while (nidx != -1 and \
title[nidx:].count('(') != title[nidx:].count(')')):
nidx = title[:nidx].rfind('(')
# Unbalanced parentheses: stop here.
if nidx == -1: break
# The last item in parentheses seems to be a year: stop here.
first4 = title[nidx+1:nidx+5]
if (first4.isdigit() or first4 == '????') and \
title[nidx+5:nidx+6] in (')', '/'): break
# The last item in parentheses is a known kind: stop here.
if title[nidx+1:-1] in ('TV', 'V', 'mini', 'VG', 'TV movie',
'TV series', 'short'): break
# Else, in parentheses there are some notes.
# XXX: should the notes in the role half be kept separated
# from the notes in the movie title half?
if notes: notes = '%s %s' % (title[nidx:], notes)
else: notes = title[nidx:]
title = title[:nidx].rstrip()
if year:
year = year.strip()
if title[-1] == ')':
fpIdx = title.rfind('(')
if fpIdx != -1:
if notes: notes = '%s %s' % (title[fpIdx:], notes)
else: notes = title[fpIdx:]
title = title[:fpIdx].rstrip()
title = u'%s (%s)' % (title, year)
if _parsingCharacter and roleID and not role:
roleID = None
if not roleID:
roleID = None
elif len(roleID) == 1:
roleID = roleID[0]
if not role and chrRoles and isinstance(roleID, (str, unicode)):
roleID = _re_chrIDs.findall(roleID)
role = ' / '.join(filter(None, chrRoles.split('@@')))
# Manages multiple roleIDs.
if isinstance(roleID, list):
tmprole = role.split('/')
role = []
for r in tmprole:
nidx = r.find('(')
if nidx != -1:
role.append(r[:nidx].rstrip())
roleNotes.append(r[nidx:])
else:
role.append(r)
roleNotes.append(None)
lr = len(role)
lrid = len(roleID)
if lr > lrid:
roleID += [None] * (lrid - lr)
elif lr < lrid:
roleID = roleID[:lr]
for i, rid in enumerate(roleID):
if rid is not None:
roleID[i] = str(rid)
if lr == 1:
role = role[0]
roleID = roleID[0]
elif roleID is not None:
roleID = str(roleID)
if movieID is not None:
movieID = str(movieID)
if (not title) or (movieID is None):
_b_m_logger.error('empty title or movieID for "%s"', txt)
if rolesNoChar:
rolesNoChar = filter(None, [x.strip() for x in rolesNoChar.split('/')])
if not role:
role = []
elif not isinstance(role, list):
role = [role]
role += rolesNoChar
notes = notes.strip()
if additionalNotes:
additionalNotes = re_spaces.sub(' ', additionalNotes).strip()
if notes:
notes += u' '
notes += additionalNotes
if role and isinstance(role, list) and notes.endswith(role[-1].replace('\n', ' ')):
role = role[:-1]
m = Movie(title=title, movieID=movieID, notes=notes, currentRole=role,
roleID=roleID, roleIsPerson=_parsingCharacter,
modFunct=modFunct, accessSystem=accessSystem)
if roleNotes and len(roleNotes) == len(roleID):
for idx, role in enumerate(m.currentRole):
try:
if roleNotes[idx]:
role.notes = roleNotes[idx]
except IndexError:
break
# Status can't be checked here, and must be detected by the parser.
if status:
m['status'] = status
return m
class DOMParserBase(object):
"""Base parser to handle HTML data from the IMDb's web server."""
_defGetRefs = False
_containsObjects = False
preprocessors = []
extractors = []
usingModule = None
_logger = logging.getLogger('imdbpy.parser.http.domparser')
def __init__(self, useModule=None):
"""Initialize the parser. useModule can be used to force it
to use 'BeautifulSoup' or 'lxml'; by default, it's auto-detected,
using 'lxml' if available and falling back to 'BeautifulSoup'
otherwise."""
# Module to use.
if useModule is None:
useModule = ('lxml', 'BeautifulSoup')
if not isinstance(useModule, (tuple, list)):
useModule = [useModule]
self._useModule = useModule
nrMods = len(useModule)
_gotError = False
for idx, mod in enumerate(useModule):
mod = mod.strip().lower()
try:
if mod == 'lxml':
from lxml.html import fromstring
from lxml.etree import tostring
self._is_xml_unicode = False
self.usingModule = 'lxml'
elif mod == 'beautifulsoup':
from bsouplxml.html import fromstring
from bsouplxml.etree import tostring
self._is_xml_unicode = True
self.usingModule = 'beautifulsoup'
else:
self._logger.warn('unknown module "%s"' % mod)
continue
self.fromstring = fromstring
self._tostring = tostring
if _gotError:
warnings.warn('falling back to "%s"' % mod)
break
except ImportError, e:
if idx+1 >= nrMods:
# Raise the exception, if we don't have any more
# options to try.
raise IMDbError('unable to use any parser in %s: %s' % \
(str(useModule), str(e)))
else:
warnings.warn('unable to use "%s": %s' % (mod, str(e)))
_gotError = True
continue
else:
raise IMDbError('unable to use parsers in %s' % str(useModule))
# Fall-back defaults.
self._modFunct = None
self._as = 'http'
self._cname = self.__class__.__name__
self._init()
self.reset()
def reset(self):
"""Reset the parser."""
# Names and titles references.
self._namesRefs = {}
self._titlesRefs = {}
self._charactersRefs = {}
self._reset()
def _init(self):
"""Subclasses can override this method, if needed."""
pass
def _reset(self):
"""Subclasses can override this method, if needed."""
pass
def parse(self, html_string, getRefs=None, **kwds):
"""Return the dictionary generated from the given html string;
getRefs can be used to force the gathering of movies/persons/characters
references."""
self.reset()
if getRefs is not None:
self.getRefs = getRefs
else:
self.getRefs = self._defGetRefs
# Useful only for the testsuite.
if not isinstance(html_string, unicode):
html_string = unicode(html_string, 'latin_1', 'replace')
html_string = subXMLRefs(html_string)
# Temporary fix: self.parse_dom must work even for empty strings.
html_string = self.preprocess_string(html_string)
html_string = html_string.strip()
if self.usingModule == 'beautifulsoup':
# tag attributes like title=""Family Guy"" will be
# converted to title=""Family Guy"" and this confuses BeautifulSoup.
html_string = html_string.replace('""', '"')
# Browser-specific escapes create problems to BeautifulSoup.
html_string = html_string.replace('<!--[if IE]>', '"')
html_string = html_string.replace('<![endif]-->', '"')
#print html_string.encode('utf8')
if html_string:
dom = self.get_dom(html_string)
#print self.tostring(dom).encode('utf8')
try:
dom = self.preprocess_dom(dom)
except Exception, e:
self._logger.error('%s: caught exception preprocessing DOM',
self._cname, exc_info=True)
if self.getRefs:
try:
self.gather_refs(dom)
except Exception, e:
self._logger.warn('%s: unable to gather refs: %s',
self._cname, exc_info=True)
data = self.parse_dom(dom)
else:
data = {}
try:
data = self.postprocess_data(data)
except Exception, e:
self._logger.error('%s: caught exception postprocessing data',
self._cname, exc_info=True)
if self._containsObjects:
self.set_objects_params(data)
data = self.add_refs(data)
return data
def _build_empty_dom(self):
from bsouplxml import _bsoup
return _bsoup.BeautifulSoup('')
def get_dom(self, html_string):
"""Return a dom object, from the given string."""
try:
dom = self.fromstring(html_string)
if dom is None:
dom = self._build_empty_dom()
self._logger.error('%s: using a fake empty DOM', self._cname)
return dom
except Exception, e:
self._logger.error('%s: caught exception parsing DOM',
self._cname, exc_info=True)
return self._build_empty_dom()
def xpath(self, element, path):
"""Return elements matching the given XPath."""
try:
xpath_result = element.xpath(path)
if self._is_xml_unicode:
return xpath_result
result = []
for item in xpath_result:
if isinstance(item, str):
item = unicode(item)
result.append(item)
return result
except Exception, e:
self._logger.error('%s: caught exception extracting XPath "%s"',
self._cname, path, exc_info=True)
return []
def tostring(self, element):
"""Convert the element to a string."""
if isinstance(element, (unicode, str)):
return unicode(element)
else:
try:
return self._tostring(element, encoding=unicode)
except Exception, e:
self._logger.error('%s: unable to convert to string',
self._cname, exc_info=True)
return u''
def clone(self, element):
"""Clone an element."""
return self.fromstring(self.tostring(element))
def preprocess_string(self, html_string):
"""Here we can modify the text, before it's parsed."""
if not html_string:
return html_string
# Remove silly » chars.
html_string = html_string.replace(u' \xbb', u'')
try:
preprocessors = self.preprocessors
except AttributeError:
return html_string
for src, sub in preprocessors:
# re._pattern_type is present only since Python 2.5.
if callable(getattr(src, 'sub', None)):
html_string = src.sub(sub, html_string)
elif isinstance(src, str):
html_string = html_string.replace(src, sub)
elif callable(src):
try:
html_string = src(html_string)
except Exception, e:
_msg = '%s: caught exception preprocessing html'
self._logger.error(_msg, self._cname, exc_info=True)
continue
##print html_string.encode('utf8')
return html_string
def gather_refs(self, dom):
"""Collect references."""
grParser = GatherRefs(useModule=self._useModule)
grParser._as = self._as
grParser._modFunct = self._modFunct
refs = grParser.parse_dom(dom)
refs = grParser.postprocess_data(refs)
self._namesRefs = refs['names refs']
self._titlesRefs = refs['titles refs']
self._charactersRefs = refs['characters refs']
def preprocess_dom(self, dom):
"""Last chance to modify the dom, before the rules in self.extractors
are applied by the parse_dom method."""
return dom
def parse_dom(self, dom):
"""Parse the given dom according to the rules specified
in self.extractors."""
result = {}
for extractor in self.extractors:
##print extractor.label
if extractor.group is None:
elements = [(extractor.label, element)
for element in self.xpath(dom, extractor.path)]
else:
groups = self.xpath(dom, extractor.group)
elements = []
for group in groups:
group_key = self.xpath(group, extractor.group_key)
if not group_key: continue
group_key = group_key[0]
# XXX: always tries the conversion to unicode:
# BeautifulSoup.NavigableString is a subclass
# of unicode, and so it's never converted.
group_key = self.tostring(group_key)
normalizer = extractor.group_key_normalize
if normalizer is not None:
if callable(normalizer):
try:
group_key = normalizer(group_key)
except Exception, e:
_m = '%s: unable to apply group_key normalizer'
self._logger.error(_m, self._cname,
exc_info=True)
group_elements = self.xpath(group, extractor.path)
elements.extend([(group_key, element)
for element in group_elements])
for group_key, element in elements:
for attr in extractor.attrs:
if isinstance(attr.path, dict):
data = {}
for field in attr.path.keys():
path = attr.path[field]
value = self.xpath(element, path)
if not value:
data[field] = None
else:
# XXX: use u'' , to join?
data[field] = ''.join(value)
else:
data = self.xpath(element, attr.path)
if not data:
data = None
else:
data = attr.joiner.join(data)
if not data:
continue
attr_postprocess = attr.postprocess
if callable(attr_postprocess):
try:
data = attr_postprocess(data)
except Exception, e:
_m = '%s: unable to apply attr postprocess'
self._logger.error(_m, self._cname, exc_info=True)
key = attr.key
if key is None:
key = group_key
elif key.startswith('.'):
# assuming this is an xpath
try:
key = self.xpath(element, key)[0]
except IndexError:
self._logger.error('%s: XPath returned no items',
self._cname, exc_info=True)
elif key.startswith('self.'):
key = getattr(self, key[5:])
if attr.multi:
if key not in result:
result[key] = []
result[key].append(data)
else:
if isinstance(data, dict):
result.update(data)
else:
result[key] = data
return result
def postprocess_data(self, data):
"""Here we can modify the data."""
return data
def set_objects_params(self, data):
"""Set parameters of Movie/Person/... instances, since they are
not always set in the parser's code."""
for obj in flatten(data, yieldDictKeys=True, scalar=_Container):
obj.accessSystem = self._as
obj.modFunct = self._modFunct
def add_refs(self, data):
"""Modify data according to the expected output."""
if self.getRefs:
titl_re = ur'(%s)' % '|'.join([re.escape(x) for x
in self._titlesRefs.keys()])
if titl_re != ur'()': re_titles = re.compile(titl_re, re.U)
else: re_titles = None
nam_re = ur'(%s)' % '|'.join([re.escape(x) for x
in self._namesRefs.keys()])
if nam_re != ur'()': re_names = re.compile(nam_re, re.U)
else: re_names = None
chr_re = ur'(%s)' % '|'.join([re.escape(x) for x
in self._charactersRefs.keys()])
if chr_re != ur'()': re_characters = re.compile(chr_re, re.U)
else: re_characters = None
_putRefs(data, re_titles, re_names, re_characters)
return {'data': data, 'titlesRefs': self._titlesRefs,
'namesRefs': self._namesRefs,
'charactersRefs': self._charactersRefs}
class Extractor(object):
"""Instruct the DOM parser about how to parse a document."""
def __init__(self, label, path, attrs, group=None, group_key=None,
group_key_normalize=None):
"""Initialize an Extractor object, used to instruct the DOM parser
about how to parse a document."""
# rarely (never?) used, mostly for debugging purposes.
self.label = label
self.group = group
if group_key is None:
self.group_key = ".//text()"
else:
self.group_key = group_key
self.group_key_normalize = group_key_normalize
self.path = path
# A list of attributes to fetch.
if isinstance(attrs, Attribute):
attrs = [attrs]
self.attrs = attrs
def __repr__(self):
"""String representation of an Extractor object."""
r = '<Extractor id:%s (label=%s, path=%s, attrs=%s, group=%s, ' \
'group_key=%s group_key_normalize=%s)>' % (id(self),
self.label, self.path, repr(self.attrs), self.group,
self.group_key, self.group_key_normalize)
return r
class Attribute(object):
"""The attribute to consider, for a given node."""
def __init__(self, key, multi=False, path=None, joiner=None,
postprocess=None):
"""Initialize an Attribute object, used to specify the
attribute to consider, for a given node."""
# The key under which information will be saved; can be a string or an
# XPath. If None, the label of the containing extractor will be used.
self.key = key
self.multi = multi
self.path = path
if joiner is None:
joiner = ''
self.joiner = joiner
# Post-process this set of information.
self.postprocess = postprocess
def __repr__(self):
"""String representation of an Attribute object."""
r = '<Attribute id:%s (key=%s, multi=%s, path=%s, joiner=%s, ' \
'postprocess=%s)>' % (id(self), self.key,
self.multi, repr(self.path),
self.joiner, repr(self.postprocess))
return r
def _parse_ref(text, link, info):
"""Manage links to references."""
if link.find('/title/tt') != -1:
yearK = re_yearKind_index.match(info)
if yearK and yearK.start() == 0:
text += ' %s' % info[:yearK.end()]
return (text.replace('\n', ' '), link)
class GatherRefs(DOMParserBase):
"""Parser used to gather references to movies, persons and characters."""
_attrs = [Attribute(key=None, multi=True,
path={
'text': './text()',
'link': './@href',
'info': './following::text()[1]'
},
postprocess=lambda x: _parse_ref(x.get('text') or u'', x.get('link') or '',
(x.get('info') or u'').strip()))]
extractors = [
Extractor(label='names refs',
path="//a[starts-with(@href, '/name/nm')][string-length(@href)=16]",
attrs=_attrs),
Extractor(label='titles refs',
path="//a[starts-with(@href, '/title/tt')]" \
"[string-length(@href)=17]",
attrs=_attrs),
Extractor(label='characters refs',
path="//a[starts-with(@href, '/character/ch')]" \
"[string-length(@href)=21]",
attrs=_attrs),
]
def postprocess_data(self, data):
result = {}
for item in ('names refs', 'titles refs', 'characters refs'):
result[item] = {}
for k, v in data.get(item, []):
k = k.strip()
v = v.strip()
if not (k and v):
continue
if not v.endswith('/'): continue
imdbID = analyze_imdbid(v)
if item == 'names refs':
obj = Person(personID=imdbID, name=k,
accessSystem=self._as, modFunct=self._modFunct)
elif item == 'titles refs':
obj = Movie(movieID=imdbID, title=k,
accessSystem=self._as, modFunct=self._modFunct)
else:
obj = Character(characterID=imdbID, name=k,
accessSystem=self._as, modFunct=self._modFunct)
# XXX: companies aren't handled: are they ever found in text,
# as links to their page?
result[item][k] = obj
return result
def add_refs(self, data):
return data
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