AttributeError: 'NoneType' object has no attribute 'upper' when parsing using tag_block #239
Description
Parsing using the tag_block queue can result in an exception:
python test_239.py
Traceback (most recent call last):
File "test_239.py", line 9, in
queue.put(line, line_no)
File "/home/avanpelt/git/TMP/FORK/libais-fork/ais/tag_block.py", line 112, in put
match = Parse(line)
File "/home/avanpelt/git/TMP/FORK/libais-fork/ais/tag_block.py", line 86, in Parse
expected = result['tag_checksum'].upper()
AttributeError: 'NoneType' object has no attribute 'upper'
import ais
from ais import tag_block
MESSAGES = ['\\g:1-2-94\\g:2-2-9470,n:11222*1D\\$SAVSI,D13MN-PS-MTEBS1,5,141030.377988,1139,-49,66*58']
queue = tag_block.TagQueue()
for line_no, line in enumerate(MESSAGES):
queue.put(line, line_no)
while not queue.empty():
tag_msg = queue.get()
if "decoded" not in tag_msg:
print("Message NOT decoded using tag_block queue")
payload = tag_msg["lines"][0]
print("payload = '{}'".format(payload))
body = payload.split(',')[-2]
pad = int(payload.split('*')[-2][-1])
print("Calling ais.decode('{}', {})".format(body, pad))
msg = ais.decode(body, pad)
print(msg)
else:
print("Message decoded using tag_block queue")