diff --git a/plugins/currency/ethereum/etherscan_balance_ b/plugins/currency/ethereum/etherscan_balance_
index 03c323d3..e3bc3d2b 100755
--- a/plugins/currency/ethereum/etherscan_balance_
+++ b/plugins/currency/ethereum/etherscan_balance_
@@ -110,7 +110,7 @@ except ValueError:
 
 try:
     eth = int(etherscan_balance['result'])
-except (KeyError, ValueError) as exc:
+except (KeyError, ValueError):
     print("JSON result error!", file=sys.stderr)
     sys.exit(9)
 
diff --git a/plugins/monit/monit_parser b/plugins/monit/monit_parser
index f7fb73a0..aefe5615 100755
--- a/plugins/monit/monit_parser
+++ b/plugins/monit/monit_parser
@@ -76,7 +76,7 @@ def get_monit_status_xml():
             auth_value = "Basic %s" % auth_base64_str
             req.add_header("Authorization", auth_value)
         conn = urllib.request.urlopen(req)
-    except urllib.error.URLError as exc:
+    except urllib.error.URLError:
         conn = None
     if conn is None:
         raise RuntimeError("Failed to open monit status URL: {}".format(MONIT_XML_URL))
diff --git a/plugins/network/sockstat-via-procfs b/plugins/network/sockstat-via-procfs
index 88afe093..8311eaa7 100755
--- a/plugins/network/sockstat-via-procfs
+++ b/plugins/network/sockstat-via-procfs
@@ -29,7 +29,7 @@ if len(sys.argv) > 1:
             print('%s.label %s' % (name, label))
         sys.exit(0)
 
-re_num = re.compile('(\d+)')
+re_num = re.compile(r'(\d+)')
 sockstat = open('/proc/net/sockstat').read()
 numbers = re_num.findall(sockstat)