diff --git a/netflow/analyzer.py b/netflow/analyzer.py
index 71338b7..7448b84 100644
--- a/netflow/analyzer.py
+++ b/netflow/analyzer.py
@@ -204,7 +204,7 @@ if __name__ == "__main__":
     if args.match_host:
         try:
             match_host = ipaddress.ip_address(args.match_host)
-        except ValueError as ex:
+        except ValueError:
             exit("IP address '{}' is neither IPv4 nor IPv6".format(args.match_host))
 
     # Using a file and using stdin differ in their further usage for gzip.open
diff --git a/netflow/ipfix.py b/netflow/ipfix.py
index 57276ce..b5121a2 100644
--- a/netflow/ipfix.py
+++ b/netflow/ipfix.py
@@ -514,9 +514,9 @@ class IPFIXFieldTypes:
         :return:
         """
         item = None
-        if type(key) == int:
+        if type(key) is int:
             item = cls.by_id(key)
-        elif type(key) == str:
+        elif type(key) is str:
             item = cls.by_name(key)
         if not item:
             return None
@@ -575,7 +575,7 @@ class IPFIXDataTypes:
         :return:
         """
         fields = ["signed8", "signed16", "signed32", "signed64"]
-        if type(dt) == DataType:
+        if type(dt) is DataType:
             return dt.type in fields
         return dt in fields
 
@@ -587,7 +587,7 @@ class IPFIXDataTypes:
         :return:
         """
         fields = ["float32", "float64"]
-        if type(dt) == DataType:
+        if type(dt) is DataType:
             return dt.type in fields
         return dt in fields
 
@@ -601,7 +601,7 @@ class IPFIXDataTypes:
         fields = ["octetArray", "string",
                   "macAddress", "ipv4Address", "ipv6Address",
                   "dateTimeMicroseconds", "dateTimeNanoseconds"]
-        if type(dt) == DataType:
+        if type(dt) is DataType:
             return dt.type in fields
         return dt in fields
 
diff --git a/netflow/utils.py b/netflow/utils.py
index 395eb21..c4603d9 100644
--- a/netflow/utils.py
+++ b/netflow/utils.py
@@ -31,8 +31,8 @@ def get_export_version(data):
     return struct.unpack('!H', data[:2])[0]
 
 
-def parse_packet(data: Union[str, bytes], templates: Dict = None) -> Union[V1ExportPacket, V5ExportPacket,
-                                                                           V9ExportPacket, IPFIXExportPacket]:
+def parse_packet(data: Union[str, bytes], templates: Dict = None) \
+        -> Union[V1ExportPacket, V5ExportPacket, V9ExportPacket, IPFIXExportPacket]:
     """
     Parse an exported packet, either from string (hex) or from bytes.
 
@@ -66,10 +66,10 @@ def parse_packet(data: Union[str, bytes], templates: Dict = None) -> Union[V1Exp
     :param templates: The templates dictionary with keys 'netflow' and 'ipfix' (created if not existing).
     :return: The parsed packet, or an exception.
     """
-    if type(data) == str:
+    if type(data) is str:
         # hex dump as string
         data = bytes.fromhex(data)
-    elif type(data) == bytes:
+    elif type(data) is bytes:
         # check representation based on utf-8 decoding result
         try:
             # hex dump as bytes, but not hex
@@ -83,8 +83,8 @@ def parse_packet(data: Union[str, bytes], templates: Dict = None) -> Union[V1Exp
 
     if version in [9, 10] and templates is None:
         raise ValueError("{} packet detected, but no templates dict was passed! For correct parsing of packets with "
-                         "templates, create a 'templates' dict and pass it into the 'parse_packet' function.".format(
-            "NetFlow v9" if version == 9 else "IPFIX"))
+                         "templates, create a 'templates' dict and pass it into the 'parse_packet' function."
+                         .format("NetFlow v9" if version == 9 else "IPFIX"))
 
     if version == 1:
         return V1ExportPacket(data)