Workaround for Python 3.8 Asyncio issues with Win 10

get_tankopedia.py

@@ -1,8 +1,16 @@
-#!/usr/local/bin/python3.7    
+#!/usr/local/bin/python3.7
 
 # Get Tankpedia from WoTinspector.com
 
-import sys, argparse, json, os, inspect, aiohttp, asyncio, re, logging
+import sys
+import argparse
+import json
+import os
+import inspect
+import aiohttp
+import asyncio
+import re
+import logging
 from pathlib import Path
 import blitzutils as bu
 from blitzutils import WG
@@ -11,65 +19,73 @@ from blitzutils import WoTinspector
 logging.getLogger("asyncio").setLevel(logging.DEBUG)
 
 VERBOSE = False
-DEBUG   = False
+DEBUG = False
 
-tank_type = [ 'lightTank', 'mediumTank', 'heavyTank', 'AT-SPG' ]
+tank_type = ['lightTank', 'mediumTank', 'heavyTank', 'AT-SPG']
 
-#@asyncio.coroutine
+# @asyncio.coroutine
 async def get_tankopedia(filename: str):
-    url="https://wotinspector.com/static/armorinspector/tank_db_blitz.js"
-    async with aiohttp.ClientSession() as client:
-        async with client.get(url) as r:
-            if r.status == 200:
-                WI_tank_db=await r.text()
-                WI_tank_db = WI_tank_db.split("\n")
-            else:
-                print('Error: Could not get valid HTTPS response. HTTP: ' + str(r.status) )  
-                sys.exit(1) 
-            tanks = {}
-            n = 0
-            p = re.compile('\\s*(\\d+):\\s{"en":"([^"]+)",.*?"tier":(\\d+), "type":(\\d), "premium":(\\d).*')
-            for line in WI_tank_db[1:-1]:
-                m = p.match(line)
-                tank = {}
-                tank['tank_id'] = int(m.group(1))
-                tank['name'] = m.group(2)
-                tank['tier'] = int(m.group(3))
-                tank['type'] = tank_type[int(m.group(4))]
-                tank['is_premium'] = (int(m.group(5)) == 1)
-                tanks[str(m.group(1))] = tank
-                n += 1
+	url = "https://wotinspector.com/static/armorinspector/tank_db_blitz.js"
+	async with aiohttp.ClientSession() as client:
+		async with client.get(url) as r:
+			if r.status == 200:
+				WI_tank_db = await r.text()
+				WI_tank_db = WI_tank_db.split("\n")
+			else:
+				print('Error: Could not get valid HTTPS response. HTTP: ' + str(r.status) )  
+				sys.exit(1) 
+			tanks = {}
+			n = 0
+			p = re.compile('\\s*(\\d+):\\s{"en":"([^"]+)",.*?"tier":(\\d+), "type":(\\d), "premium":(\\d).*')
+			for line in WI_tank_db[1:-1]:
+				m = p.match(line)
+				tank = {}
+				tank['tank_id'] = int(m.group(1))
+				tank['name'] = m.group(2)
+				tank['tier'] = int(m.group(3))
+				tank['type'] = tank_type[int(m.group(4))]
+				tank['is_premium'] = (int(m.group(5)) == 1)
+				tanks[str(m.group(1))] = tank
+				n += 1
 
-            tankopedia = {}
-            tankopedia['status'] = "ok"
-            tankopedia['meta'] = {"count" : n}
-            tankopedia['data'] = tanks
-            print("Tankopedia has " + str(n) + " tanks in: " + filename)
-            with open(filename,'w') as outfile:
-                outfile.write(json.dumps(tankopedia, ensure_ascii=False, indent=4, sort_keys=True))
-            return None
+			tankopedia = {}
+			tankopedia['status'] = "ok"
+			tankopedia['meta'] = {"count" : n}
+			tankopedia['data'] = tanks
+			print("Tankopedia has " + str(n) + " tanks in: " + filename)
+			with open(filename,'w') as outfile:
+				outfile.write(json.dumps(tankopedia, ensure_ascii=False, indent=4, sort_keys=True))
+			return None
 
 
 async def main(argv):
-    # set the directory for the script
-    os.chdir(os.path.dirname(sys.argv[0]))
+	# set the directory for the script
+	os.chdir(os.path.dirname(sys.argv[0]))
 
-    parser = argparse.ArgumentParser(description='Retrieve Tankopedia from WoTinspector.com')
-    parser.add_argument('--file', dest="outfile", help='Write Tankopedia to file')
-    parser.add_argument('-d', '--debug', action='store_true', default=False, help='Debug mode')
-    parser.add_argument('-v', '--verbose', action='store_true', default=False, help='Verbose mode')
-    parser.add_argument('-s', '--silent', action='store_true', default=False, help='Silent mode')
-    
-    args = parser.parse_args()
-    bu.set_log_level(args.silent, args.verbose, args.debug)
-    
-    wi = WoTinspector()
+	parser = argparse.ArgumentParser(description='Retrieve Tankopedia from WoTinspector.com')
+	parser.add_argument('--file', dest="outfile", help='Write Tankopedia to file')
+	parser.add_argument('-d', '--debug', action='store_true', default=False, help='Debug mode')
+	parser.add_argument('-v', '--verbose', action='store_true', default=False, help='Verbose mode')
+	parser.add_argument('-s', '--silent', action='store_true', default=False, help='Silent mode')
 
-    await wi.get_tankopedia(args.outfile)
+	args = parser.parse_args()
+	bu.set_log_level(args.silent, args.verbose, args.debug)
 
-    await wi.close()
+	wi = WoTinspector()	
+	await wi.get_tankopedia(args.outfile)
+
+	await wi.close()
     
 
-### main()
+# main()
 if __name__ == "__main__":
-   asyncio.run(main(sys.argv[1:]), debug=False)
+	# To avoid 'Event loop is closed' RuntimeError due to compatibility issue with aiohttp
+	if sys.platform.startswith("win") and sys.version_info >= (3, 8):
+		try:
+			from asyncio import WindowsSelectorEventLoopPolicy
+		except ImportError:
+			pass
+		else:
+			if not isinstance(asyncio.get_event_loop_policy(), WindowsSelectorEventLoopPolicy):
+				asyncio.set_event_loop_policy(WindowsSelectorEventLoopPolicy())
+	asyncio.run(main(sys.argv[1:]), debug=False)