change method name and extract unhandled commands into constamt

pycaption/scc/__init__.py

@@ -292,7 +292,7 @@ def _translate_line(self, line):
                 self._translate_word(word)
 
     def _translate_word(self, word):
-        if self._handle_double_command(word):
+        if self._skip_double_command(word):
             # count frames for timing
             self.time_translator.increment_frames()
             return
@@ -316,7 +316,7 @@ def _translate_word(self, word):
         # count frames for timing only after processing a command
         self.time_translator.increment_frames()
 
-    def _handle_double_command(self, word):
+    def _skip_double_command(self, word):
         # If the caption is to be broadcast, each of the commands are doubled
         # up for redundancy in case the signal is garbled in transmission.
         # The decoder is programmed to ignore a second command when it is the

pycaption/scc/constants.py

@@ -985,3 +985,5 @@ def _restructure_bytes_to_position_map(byte_to_pos_map):
 
 
 HEADER = 'Scenarist_SCC V1.0'
+
+UNHANDLED_COMMANDS = ["9120", "91ae", "912f", "91a1"]

pycaption/scc/specialized_collections.py

@@ -8,7 +8,7 @@
 )
 from .constants import (
     PAC_BYTES_TO_POSITIONING_MAP, COMMANDS, PAC_TAB_OFFSET_COMMANDS,
-    MICROSECONDS_PER_CODEWORD,
+    MICROSECONDS_PER_CODEWORD, UNHANDLED_COMMANDS
 )
 
 PopOnCue = collections.namedtuple("PopOnCue", "buffer, start, end")
@@ -342,7 +342,7 @@ def interpret_command(self, command):
 
         :type command: str
         """
-        if command not in ["9120", "91ae", "912f", "91a1"]:
+        if command not in UNHANDLED_COMMANDS:
             self._update_positioning(command)
         text = COMMANDS.get(command, '')
         if 'italic' in text: