Fix some minor linting problems and small bugs in startup scripts

run-pydex

@@ -1,5 +1,5 @@
 source setup
-source start-order-update-hanlder
+source start-order-update-handler
 
 if [[ `lsof -t -i :3000` ]]; then 
     echo "dex server already running at port 3000"

src/pydex_app/order_update_handler.py

@@ -149,7 +149,7 @@ def on_update(self, res):
                 self.handle_fillable_order(order_hash)
         return res
 
-    def get_order_by_hash(self, order_hash):
+    def get_order_by_hash(self, order_hash):  # pylint: disable=no-self-use
         """Get an order by hash from the database.
 
         Keyword argument:
@@ -216,7 +216,7 @@ def handle_unfillable_order(
             if commit:
                 self._commit_db()
 
-    def _commit_db(self):
+    def _commit_db(self):  # pylint: disable=no-self-use
         LOGGER.debug("commit changes to DB...")
         db.session.commit()  # pylint: disable=no-member
 

src/utils/miscutils.py

@@ -38,7 +38,7 @@ def try_(func, *args, **kwargs):
     try:
         return func(*args, **kwargs)
     except Exception:  # pylint: disable=broad-except
-        return None
+        return _default_val
 
 
 def paginate(arr, page=1, per_page=20):

start-order-update-handler

@@ -1,8 +1,9 @@
 source start-order-watcher-server
+sleep 1
 source pydex_env/bin/activate
 
 export ORDER_UPDATE_HANDLER_LOG_FILE="./logs/order_update_handler.log"
-alias get-order-update-handler-pid="ps -aef | grep -v grep | grep 'python3 src/pydex_app/order_update_handler.py' | tr -s ' ' | cut -d ' ' -f 4" 
+alias get-order-update-handler-pid="ps -aef | grep -v grep | grep 'python3 src/pydex_app/order_update_handler.py' | tr -s ' ' | cut -d ' ' -f 3" 
 export ORDER_UPDATE_HANDLER_PID=`get-order-update-handler-pid`
 
 if [[ $ORDER_UPDATE_HANDLER_PID ]]; then