/usr/lib/python2.7/dist-packages/parsel/xpathfuncs.py is in python-parsel 1.4.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | from lxml import etree
from six import string_types
def set_xpathfunc(fname, func):
"""Register a custom extension function to use in XPath expressions.
The function ``func`` registered under ``fname`` identifier will be called
for every matching node, being passed a ``context`` parameter as well as
any parameters passed from the corresponding XPath expression.
If ``func`` is ``None``, the extension function will be removed.
See more `in lxml documentation`_.
.. _`in lxml documentation`: http://lxml.de/extensions.html#xpath-extension-functions
"""
ns_fns = etree.FunctionNamespace(None)
if func is not None:
ns_fns[fname] = func
else:
del ns_fns[fname]
def setup():
set_xpathfunc('has-class', has_class)
def has_class(context, *classes):
"""has-class function.
Return True if all ``classes`` are present in element's class attr.
"""
if not context.eval_context.get('args_checked'):
if not classes:
raise ValueError(
'XPath error: has-class must have at least 1 argument')
for c in classes:
if not isinstance(c, string_types):
raise ValueError(
'XPath error: has-class arguments must be strings')
context.eval_context['args_checked'] = True
node_cls = context.context_node.get('class')
if node_cls is None:
return False
node_cls = ' ' + node_cls + ' '
for cls in classes:
if ' ' + cls + ' ' not in node_cls:
return False
return True
|