when trying to use python.gevent_theadring getting error:

this happened while trying to implement pyshark:
import pyshark
capture = pyshark.LiveCapture(interface='wlan0')
capture.sniff(timeout=50)
capture
i have tried also to run it through interpreter yet, i got this error:
import pyshark

ImportError Traceback (most recent call last)
<ipython-input-1-e46ddf42872e> in <module>()
----> 1 import pyshark

/usr/local/lib/python2.7/dist-packages/pyshark-0.3.4-py2.7.egg/pyshark/init.py in <module>()
----> 1 from pyshark.capture.live_capture import LiveCapture
2 from pyshark.capture.file_capture import FileCapture
3 from pyshark.capture.remote_capture import RemoteCapture
4 from pyshark.capture.inmem_capture import InMemCapture

/usr/local/lib/python2.7/dist-packages/pyshark-0.3.4-py2.7.egg/pyshark/capture/live_capture.py in <module>()
----> 1 from pyshark.capture.capture import Capture
2 from pyshark.tshark.tshark import get_tshark_interfaces
3
4
5 class LiveCapture(Capture):

/usr/local/lib/python2.7/dist-packages/pyshark-0.3.4-py2.7.egg/pyshark/capture/capture.py in <module>()
1 from future import unicode_literals
2 import os
----> 3 import logbook
4 import sys
5

/usr/local/lib/python2.7/dist-packages/logbook/init.py in <module>()
12
13
---> 14 from logbook.base import LogRecord, Logger, LoggerGroup, NestedSetup, \
15 Processor, Flags, get_level_name, lookup_level, dispatch_record, \
16 CRITICAL, ERROR, WARNING, NOTICE, INFO, DEBUG, NOTSET, \

/usr/local/lib/python2.7/dist-packages/logbook/base.py in <module>()
16 from datetime import datetime
17 from logbook import helpers
---> 18 from logbook.concurrency import thread_get_name, thread_get_ident, greenlet_get_ident
19
20 from logbook.helpers import to_safe_json, parse_iso8601, cached_property, \

/usr/local/lib/python2.7/dist-packages/logbook/concurrency.py in <module>()
29
30 if has_gevent:
---> 31 from gevent._threading import (Lock as ThreadLock,
32 RLock as ThreadRLock,
33 get_ident as thread_get_ident,

ImportError: No module named _threading

i tried importing threading first and importing pyshark, but the answer was the same.