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# Helper functions and mixin classes for Beautiful Soup
import types
try:
set
except NameError:
from sets import Set as set
def isList(l):
"""Convenience method that works with all 2.x versions of Python
to determine whether or not something is listlike."""
return ((hasattr(l, '__iter__') and not isString(l))
or (type(l) in (types.ListType, types.TupleType)))
def isString(s):
"""Convenience method that works with all 2.x versions of Python
to determine whether or not something is stringlike."""
try:
return isinstance(s, unicode) or isinstance(s, basestring)
except NameError:
return isinstance(s, str)
def buildSet(args=None):
"""Turns a list or a string into a set."""
if isinstance(args, str):
return set([args])
if args is None:
return set()
return set(args)
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