PAPI: Add support for format/unformat functions.

With the introduction of new types, like vl_api_address_t
it is now possible to call a message using one of those
functions with a string representation. E.g. for an IP address

ip_add_address(address="1.1.1.1/24")

The language wrapper will automatically convert the string
into the vl_api_address_t representation. Currently
the caller must do the reverse conversion from the returned
named tuple with the unformat function.
rv = get_address_on_interface(sw_if_index=1)
print(VPPFormat.unformat(rv.address))

Change-Id: Ic872b4560b2f4836255bd5260289bfa38c75bc5d
Signed-off-by: Ole Troan <ot@cisco.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/src/vpp-api/python/vpp_papi/vpp_stats.py b/src/vpp-api/python/vpp_papi/vpp_stats.py
index 8c1aaf2b87a..76e1e5435f0 100644
--- a/src/vpp-api/python/vpp_papi/vpp_stats.py
+++ b/src/vpp-api/python/vpp_papi/vpp_stats.py
@@ -62,7 +62,8 @@ def make_string_vector(api, strings):
     if type(strings) is not list:
         strings = [strings]
     for s in strings:
-        vec = api.stat_segment_string_vector(vec, ffi.new("char []", s.encode()))
+        vec = api.stat_segment_string_vector(vec, ffi.new("char []",
+                                                          s.encode()))
     return vec
 
 
@@ -134,7 +135,7 @@ class VPPStats:
         for i in range(rv_len):
             n = ffi.string(rv[i].name).decode()
             e = stat_entry_to_python(self.api, rv[i])
-            if e != None:
+            if e is not None:
                 stats[n] = e
         return stats
 
@@ -144,7 +145,7 @@ class VPPStats:
             try:
                 dir = self.ls(name)
                 return self.dump(dir).values()[0]
-            except:
+            except Exception as e:
                 if retries > 10:
                     return None
                 retries += 1
@@ -161,7 +162,7 @@ class VPPStats:
                 error_names = self.ls(['/err/'])
                 error_counters = self.dump(error_names)
                 break
-            except:
+            except Exception as e:
                 if retries > 10:
                     return None
                 retries += 1