misc: vpp_papi- add tests, clean up pep8

Type: test

Change-Id: Ic81bd4a9eba3c89a746e7a9b9e471b59cd87fa40
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
diff --git a/src/vpp-api/python/vpp_papi/vpp_stats.py b/src/vpp-api/python/vpp_papi/vpp_stats.py
index 590549a..3638892 100644
--- a/src/vpp-api/python/vpp_papi/vpp_stats.py
+++ b/src/vpp-api/python/vpp_papi/vpp_stats.py
@@ -86,7 +86,7 @@
 uint64_t stat_segment_version(void);
 uint64_t stat_segment_version_r(stat_client_main_t *sm);
 void free(void *ptr);
-""")
+""")  # noqa: E501
 
 
 # Utility functions
@@ -130,12 +130,14 @@
         vec.append(if_per_thread)
     return vec
 
+
 def error_vec_list(api, e):
     vec = []
     for thread in range(api.stat_segment_vec_len(e)):
         vec.append(e[thread])
     return vec
 
+
 def name_vec_list(api, e):
     return [ffi.string(e[i]).decode('utf-8') for i in
             range(api.stat_segment_vec_len(e)) if e[i] != ffi.NULL]
@@ -175,7 +177,7 @@
         if not message:
             try:
                 message = self.message % kwargs
-            except Exception as e:
+            except Exception:
                 message = self.message
         else:
             message = message % kwargs
@@ -258,7 +260,7 @@
                                          .format(name))
                 k, v = s.popitem()
                 return v
-            except VPPStatsIOError as e:
+            except VPPStatsIOError:
                 if retries > 10:
                     return None
                 retries += 1
@@ -280,7 +282,7 @@
                 error_names = self.ls(['/err/'])
                 error_counters = self.dump(error_names)
                 break
-            except VPPStatsIOError as e:
+            except VPPStatsIOError:
                 if retries > 10:
                     return None
                 retries += 1