import sys __all__ = ['b', 'basestring_', 'bytes', 'unicode_', 'next', 'is_unicode'] if sys.version < "3": b = bytes = str basestring_ = basestring unicode_ = unicode else: def b(s): if isinstance(s, str): return s.encode('latin1') return bytes(s) basestring_ = (bytes, str) bytes = bytes unicode_ = str text = str if sys.version < "3": def next(obj): return obj.next() else: next = next if sys.version < "3": def is_unicode(obj): return isinstance(obj, unicode) else: def is_unicode(obj): return isinstance(obj, str) def coerce_text(v): if not isinstance(v, basestring_): if sys.version < "3": attr = '__unicode__' else: attr = '__str__' if hasattr(v, attr): return unicode(v) else: return bytes(v) return v