Initial python3 changes

Mostly just updating libraries, removing string encoding/decoding,
fixing some edge cases. No new functionality was added in this
commit.

lib/apscheduler/executors/asyncio.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+
 import sys
 
 from apscheduler.executors.base import BaseExecutor, run_job

lib/apscheduler/executors/gevent.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+
 import sys
 
 from apscheduler.executors.base import BaseExecutor, run_job

lib/apscheduler/executors/twisted.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+
 
 from apscheduler.executors.base import BaseExecutor, run_job
 

lib/apscheduler/jobstores/memory.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+
 
 from apscheduler.jobstores.base import BaseJobStore, JobLookupError, ConflictingIdError
 from apscheduler.util import datetime_to_utc_timestamp

lib/apscheduler/jobstores/mongodb.py

@@ -1,11 +1,11 @@
-from __future__ import absolute_import
+
 
 from apscheduler.jobstores.base import BaseJobStore, JobLookupError, ConflictingIdError
 from apscheduler.util import maybe_ref, datetime_to_utc_timestamp, utc_timestamp_to_datetime
 from apscheduler.job import Job
 
 try:
-    import cPickle as pickle
+    import pickle as pickle
 except ImportError:  # pragma: nocover
     import pickle
 

lib/apscheduler/jobstores/redis.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+
 
 import six
 
@@ -7,7 +7,7 @@ from apscheduler.util import datetime_to_utc_timestamp, utc_timestamp_to_datetim
 from apscheduler.job import Job
 
 try:
-    import cPickle as pickle
+    import pickle as pickle
 except ImportError:  # pragma: nocover
     import pickle
 

lib/apscheduler/jobstores/sqlalchemy.py

@@ -1,11 +1,11 @@
-from __future__ import absolute_import
+
 
 from apscheduler.jobstores.base import BaseJobStore, JobLookupError, ConflictingIdError
 from apscheduler.util import maybe_ref, datetime_to_utc_timestamp, utc_timestamp_to_datetime
 from apscheduler.job import Job
 
 try:
-    import cPickle as pickle
+    import pickle as pickle
 except ImportError:  # pragma: nocover
     import pickle
 

lib/apscheduler/schedulers/asyncio.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+
 from functools import wraps
 
 from apscheduler.schedulers.base import BaseScheduler

lib/apscheduler/schedulers/background.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+
 from threading import Thread, Event
 
 from apscheduler.schedulers.base import BaseScheduler

lib/apscheduler/schedulers/base.py

@@ -1,4 +1,4 @@
-from __future__ import print_function
+
 from abc import ABCMeta, abstractmethod
 from collections import MutableMapping
 from threading import RLock

lib/apscheduler/schedulers/blocking.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+
 from threading import Event
 
 from apscheduler.schedulers.base import BaseScheduler

lib/apscheduler/schedulers/gevent.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+
 
 from apscheduler.schedulers.blocking import BlockingScheduler
 from apscheduler.schedulers.base import BaseScheduler

lib/apscheduler/schedulers/qt.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+
 
 from apscheduler.schedulers.base import BaseScheduler
 

lib/apscheduler/schedulers/tornado.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+
 from datetime import timedelta
 from functools import wraps
 

lib/apscheduler/schedulers/twisted.py

@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+
 from functools import wraps
 
 from apscheduler.schedulers.base import BaseScheduler

lib/apscheduler/util.py

@@ -1,6 +1,6 @@
 """This module contains several handy functions primarily meant for internal use."""
 
-from __future__ import division
+
 from datetime import date, datetime, time, timedelta, tzinfo
 from inspect import isfunction, ismethod, getargspec
 from calendar import timegm
@@ -23,7 +23,7 @@ __all__ = ('asint', 'asbool', 'astimezone', 'convert_to_datetime', 'datetime_to_
 
 
 class _Undefined(object):
-    def __nonzero__(self):
+    def __bool__(self):
         return False
 
     def __bool__(self):
@@ -116,7 +116,7 @@ def convert_to_datetime(input, tz, arg_name):
         m = _DATE_REGEX.match(input)
         if not m:
             raise ValueError('Invalid date string')
-        values = [(k, int(v or 0)) for k, v in m.groupdict().items()]
+        values = [(k, int(v or 0)) for k, v in list(m.groupdict().items())]
         values = dict(values)
         datetime_ = datetime(**values)
     else: