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Apply windows work-around fix for async applications #1383

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merged 1 commit into from
Sep 13, 2020
Merged

Apply windows work-around fix for async applications #1383

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5 changes: 5 additions & 0 deletions nbconvert/nbconvertapp.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@
import sys
import os
import glob
import asyncio
from textwrap import fill, dedent
from ipython_genutils.text import indent

Expand Down Expand Up @@ -285,6 +286,10 @@ def _postprocessor_class_changed(self, change):
@catch_config_error
def initialize(self, argv=None):
"""Initialize application, notebooks, writer, and postprocessor"""
# See https://bugs.python.org/issue37373 :(
if sys.version_info[0] == 3 and sys.version_info[1] >= 8 and sys.platform.startswith('win'):
asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())

self.init_syspath()
super().initialize(argv)
self.init_notebooks()
Expand Down