You should have received a copy of the GNU General Public License
along with notmuch. If not, see <http://www.gnu.org/licenses/>.
-Copyright 2010 Sebastian Spaeth <Sebastian@SSpaeth.de>'
+Copyright 2010 Sebastian Spaeth <Sebastian@SSpaeth.de>
"""
from ctypes import c_char_p
-from notmuch.globals import (
+from .globals import (
nmlib,
Python3StringMixIn,
NotmuchTagsP,
next = __next__ # python2.x iterator protocol compatibility
def __nonzero__(self):
- """Implement bool(Tags) check that can be repeatedly used
+ '''
+ Implement truth value testing. If __nonzero__ is not
+ implemented, the python runtime would fall back to `len(..) >
+ 0` thus exhausting the iterator.
- If __nonzero__ is not implemented, "if Tags()"
- will implicitly call __len__, using up our iterator, so it is
- important that this function is defined.
-
- :returns: True if the Tags() iterator has at least one more Tag
- left."""
- return self._valid(self._tags) > 0
+ :returns: True if the wrapped iterator has at least one more object
+ left.
+ '''
+ return self._tags and self._valid(self._tags)
def __unicode__(self):
"""string representation of :class:`Tags`: a space separated list of tags
def __del__(self):
"""Close and free the notmuch tags"""
- if self._tags is not None:
+ if self._tags:
self._destroy(self._tags)