def clean_page(html, other_page):
"""
Wrapper around the various cleaning functions. This accepts and returns
strings instead of trees.
"""
tree1 = make_tree_and_preprocess(html)
tree2 = make_tree_and_preprocess(other_page)
strip_template(tree1, tree2)
# drop_useless_tags(tree1)
# remove_empty_tags(tree1, ('div', 'span', 'td', 'tr', 'table'))
return etree.tostring(tree1, method='html'), etree.tostring(tree2, method='html')
def clean_page(html, other_page):
"""
Wrapper around the various cleaning functions. This accepts and returns
strings instead of trees.
"""
tree1 = make_tree_and_preprocess(html)
tree2 = make_tree_and_preprocess(other_page)
strip_template(tree1, tree2)
# drop_useless_tags(tree1)
# remove_empty_tags(tree1, ('div', 'span', 'td', 'tr', 'table'))
return etree.tostring(tree1, method='html'), etree.tostring(tree2, method='html')
def mine_page(html, other_pages):
result = []
for hole in extract(html, other_pages):
# Differences in attribute values aren't relevant.
if hole['type'] == 'attrib' or not hole['value'] or not hole['value'].strip():
continue
# # Differences in links are likely navigation, and can be ignored.
# if hole['type'] == 'text' and hole['tag'] == 'a':
# continue
# If it's a multitag value, clean its HTML a bit.
if hole['type'] == 'multitag':
tree = make_tree_and_preprocess(hole['value'])
# Drop a bunch of tags that can muck up the display.
tree = preprocess(tree,
drop_tags=('a', 'area', 'b', 'center', 'font', 'form', 'img', 'input', 'map', 'small', 'sub', 'sup', 'topic'),
drop_trees=('applet', 'button', 'embed', 'iframe', 'object', 'select', 'textarea'),
drop_attrs=('background', 'border', 'cellpadding', 'cellspacing', 'class', 'clear', 'id', 'rel', 'style', 'target'))
remove_empty_tags(tree, ('br',))
tree = brs_to_paragraphs(tree)
# The [6:-7] cuts off the '<body>' and '</body>'.
try:
body = tree.body
except IndexError:
continue # lxml raises an IndexError if there's no <body>.
# Skip bits that don't have at least one letter or number.
# Note: If this code is ever internationalized, this will have to be
# removed.
if not re.search('[A-Za-z0-9]', body.text_content()):
continue
string = etree.tostring(body, method='html')[6:-7]
else:
string = hole['value']
# Skip bits that don't have at least one letter or number.
# Note: If this code is ever internationalized, this will have to be
# removed.
if not re.search('[A-Za-z0-9]', string):
continue
# Clean up newlines, tabs and .
string = re.sub('[\n\t]', ' ', string.strip())
string = string.replace(' ', ' ')
string = string.replace(' ', ' ')
result.append(string)
return result
def mine_page(html, other_pages):
result = []
for hole in extract(html, other_pages):
# Differences in attribute values aren't relevant.
if hole['type'] == 'attrib' or not hole['value'] or not hole['value'].strip():
continue
# # Differences in links are likely navigation, and can be ignored.
# if hole['type'] == 'text' and hole['tag'] == 'a':
# continue
# If it's a multitag value, clean its HTML a bit.
if hole['type'] == 'multitag':
tree = make_tree_and_preprocess(hole['value'])
# Drop a bunch of tags that can muck up the display.
tree = preprocess(tree,
drop_tags=('a', 'area', 'b', 'center', 'font', 'form', 'img', 'input', 'map', 'small', 'sub', 'sup', 'topic'),
drop_trees=('applet', 'button', 'embed', 'iframe', 'object', 'select', 'textarea'),
drop_attrs=('background', 'border', 'cellpadding', 'cellspacing', 'class', 'clear', 'id', 'rel', 'style', 'target'))
remove_empty_tags(tree, ('br',))
tree = brs_to_paragraphs(tree)
# The [6:-7] cuts off the '<body>' and '</body>'.
try:
body = tree.body
except IndexError:
continue # lxml raises an IndexError if there's no <body>.
# Skip bits that don't have at least one letter or number.
# Note: If this code is ever internationalized, this will have to be
# removed.
if not re.search('[A-Za-z0-9]', body.text_content()):
continue
string = etree.tostring(body, method='html')[6:-7]
else:
string = hole['value']
# Skip bits that don't have at least one letter or number.
# Note: If this code is ever internationalized, this will have to be
# removed.
if not re.search('[A-Za-z0-9]', string):
continue
# Clean up newlines, tabs and .
string = re.sub('[\n\t]', ' ', string.strip())
string = string.replace(' ', ' ')
string = string.replace(' ', ' ')
result.append(string)
return result
def extract(self, html):
tree = make_tree_and_preprocess(html)
if self.htmltree is None:
raise ValueError('This template has not learned anything yet.')
return tree_extract(self.htmltree, tree, self.algorithm)
def learn(self, html):
tree = make_tree_and_preprocess(html)
if self.htmltree is None:
self.htmltree = tree
else:
self.htmltree = tree_diff(self.htmltree, tree, self.algorithm)
def extract(self, html):
tree = make_tree_and_preprocess(html)
if self.htmltree is None:
raise ValueError('This template has not learned anything yet.')
return tree_extract(self.htmltree, tree, self.algorithm)
def learn(self, html):
tree = make_tree_and_preprocess(html)
if self.htmltree is None:
self.htmltree = tree
else:
self.htmltree = tree_diff(self.htmltree, tree, self.algorithm)
