parallelize router queries

inventory_provider/router_interfaces.py

 import contextlib
 import json
 import re
+from multiprocessing import Pool
 
 import click
 import jsonschema
@@ -217,6 +218,10 @@ def get_router_interfaces(router):
         }
 
 
+def get_router_interfaces_l(router):
+    return list(get_router_interfaces(router))
+
+
 @click.command()
 @click.option(
     "--config",
@@ -226,15 +231,13 @@ def get_router_interfaces(router):
     default=open("config.json"),
     callback=_validate_config)
 def cli(config):
+    pool = Pool(20)
     with open("routers_community.conf") as f:
-        for r in load_routers(f):
-
-            with connection(config["alarms-db"]) as c:
-                _db_test(c, r)
-
-            print(r["hostname"])
-            for i in get_router_interfaces(r):
-                print("\t%r" % i)
+        routers = list(load_routers(f))
+    for r, i in zip(routers, pool.map(get_router_interfaces_l, routers)):
+        print(r["hostname"])
+        for ifc in i:
+            print("\t%r" % ifc)
 
 
 if __name__ == "__main__":