can: amend recently added Python output feature

Adjust nits in the previous commit which added Python output to the CAN
decoder. Rename the routine to .putpy() for consistency with other PDs.
Avoid the 'bytes' identifier as it ships with Python as a data type.
Rephrase the construction of the tuple for Python output, to become more
explicit and help reviewers. Partially "undo" the rtr rename, to reduce
diffs to the previous version (see diff HEAD~2 to see the essence). Fix
up a three space indentation issue (which was there before the addition
of Python output).

1 files changed, 15 insertions, 11 deletions

diff --git a/decoders/can/pd.py b/decoders/can/pd.py
index 0e14f63..e38f69d 100644
--- a/decoders/can/pd.py
+++ b/decoders/can/pd.py
@@ -118,7 +118,7 @@ class Decoder(srd.Decoder):
     def putb(self, data):
         self.putg(self.ss_block, self.samplenum, data)
 
-    def putpp(self, data):
+    def putpy(self, data):
         self.put(self.ss_packet, self.es_packet, self.out_python, data)
 
     def reset_variables(self):
@@ -132,7 +132,7 @@ class Decoder(srd.Decoder):
         self.ss_bit12 = None
         self.ss_bit32 = None
         self.ss_databytebits = []
-        self.bytes = []
+        self.frame_bytes = []
         self.rtr_type = None
         self.fd = False
         self.rtr = None
@@ -242,7 +242,9 @@ class Decoder(srd.Decoder):
             if self.rawbits[-7:] != [1, 1, 1, 1, 1, 1, 1]:
                 self.putb([16, ['End of frame (EOF) must be 7 recessive bits']])
             self.es_packet = self.samplenum
-            self.putpp((self.frame_type, self.fullid, self.rtr_type, self.dlc, self.bytes))
+            py_data = tuple([self.frame_type, self.fullid, self.rtr_type,
+                self.dlc, self.frame_bytes])
+            self.putpy(py_data)
             self.reset_variables()
             return True
 
@@ -271,9 +273,10 @@ class Decoder(srd.Decoder):
                 # Bit 12: Remote transmission request (RTR) bit
                 # Data frame: dominant, remote frame: recessive
                 # Remote frames do not contain a data field.
-                self.rtr_type = 'remote' if self.bits[12] == 1 else 'data'
-                self.put12([8, ['Remote transmission request: %s frame' % self.rtr_type,
-                                'RTR: %s frame' % self.rtr_type, 'RTR']])
+                rtr = 'remote' if self.bits[12] == 1 else 'data'
+                self.put12([8, ['Remote transmission request: %s frame' % rtr,
+                                'RTR: %s frame' % rtr, 'RTR']])
+                self.rtr_type = rtr
                 self.dlc_start = 15
 
         if bitnum == 15 and self.fd:
@@ -309,7 +312,7 @@ class Decoder(srd.Decoder):
             for i in range(dlc2len(self.dlc)):
                 x = self.dlc_start + 4 + (8 * i)
                 b = int(''.join(str(d) for d in self.bits[x:x + 8]), 2)
-                self.bytes[i] = b
+                self.frame_bytes.append(b)
                 ss = self.ss_databytebits[i * 8]
                 es = self.ss_databytebits[((i + 1) * 8) - 1]
                 self.putg(ss, es, [0, ['Data byte %d: 0x%02x' % (i, b),
@@ -356,9 +359,10 @@ class Decoder(srd.Decoder):
             self.rtr = can_rx
 
             if not self.fd:
-               self.rtr_type = 'remote' if can_rx == 1 else 'data'
-               self.putx([8, ['Remote transmission request: %s frame' % self.rtr_type,
-                              'RTR: %s frame' % self.rtr_type, 'RTR']])
+                rtr = 'remote' if can_rx == 1 else 'data'
+                self.putx([8, ['Remote transmission request: %s frame' % rtr,
+                              'RTR: %s frame' % rtr, 'RTR']])
+                self.rtr_type = rtr
 
         # Bit 33: RB1 (reserved bit)
         elif bitnum == 33:
@@ -408,7 +412,7 @@ class Decoder(srd.Decoder):
             for i in range(dlc2len(self.dlc)):
                 x = self.dlc_start + 4 + (8 * i)
                 b = int(''.join(str(d) for d in self.bits[x:x + 8]), 2)
-                self.bytes.append(b)
+                self.frame_bytes.append(b)
                 ss = self.ss_databytebits[i * 8]
                 es = self.ss_databytebits[((i + 1) * 8) - 1]
                 self.putg(ss, es, [0, ['Data byte %d: 0x%02x' % (i, b),