Error parsing a file timestamp in getfiledate()

[peterk]

Thank you for your great project. I followed the guide to add tag blocks to a simple AIS string from the https://github.com/GlobalFishingWatch/ais-tools project.

$ echo '!AIVDM,1,1,,A,15NTES0P00J>tC4@@FOhMgvD0D0M,0*49' | ais-tools add-tagblock -s my-station > datesample.nm4

The resulting file contains the single line:

\c:1722621763484,s:my-station,T:2024-08-02 18.02.43*26\!AIVDM,1,1,,A,15NTES0P00J>tC4@@FOhMgvD0D0M,0*49

I tried the following script using aisdb to load the file into an sqlite db:

import aisdb
filepaths=['./datesample.nm4']

with aisdb.DBConn(dbpath = './datesample.db') as dbconn:
    aisdb.decode_msgs(filepaths=filepaths, dbconn=dbconn, source='TESTING')

This gives the following error:

generating file checksums...
checking file dates...
Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
  File "/.../aisdb/database/decoder.py", line 249, in decode_msgs
    filedates = [getfiledate(f) for f in raw_files]
  File "/.../aisdb/database/decoder.py", line 249, in <listcomp>
    filedates = [getfiledate(f) for f in raw_files]
  File "/.../aisdb/proc_util.py", line 275, in getfiledate
    fdate = datetime.fromtimestamp(epoch).date()
ValueError: year 56557 is out of range

I expected the file to be parsed and loaded into the db.

Running Python 3.10.12 on macOS.