Error : when use specific name as output file name in obspy.io.mseed

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1

Hi all,
When I try to write an MSEED file with the filename as its starting time it gave me the following error, But it is working when i give filename in words
[eg:
tr.write(‘test’, format=‘MSEED’)
]
error:

>> st=read(“LSA.IC.mseed”)

>>tr=st[0]
>> tr.write(str(tr.stats.starttime), format=‘MSEED’)
Traceback (most recent call last):

File “”, line 1, in
tr_hourly.write(str(tr.stats.starttime), format=‘MSEED’)

File “C:\ProgramData\Anaconda3\envs\obspy\lib\site-packages\obspy\core\trace.py”, line 990, in write
Stream([self]).write(filename, format, **kwargs)

File “C:\ProgramData\Anaconda3\envs\obspy\lib\site-packages\obspy\core\stream.py”, line 1462, in write
write_format(self, filename, **kwargs)

File “C:\ProgramData\Anaconda3\envs\obspy\lib\site-packages\obspy\io\mseed\core.py”, line 846, in _write_mseed
f = open(filename, ‘wb’)

OSError: [Errno 22] Invalid argument: ‘2020-03-01T00:00:00.019500Z’

How could I write MSEED files with a timestamp as the filenames?

2

Hi Vivec,

I'm guessing the colon might not be allowed in a filename on Windows.
Try building filenames without dots and colons..

http://docs.obspy.org/master/packages/autogen/obspy.core.utcdatetime.UTCDateTime.strftime.html

e.g.
filename = tr.stats.starttime.strftime('%Y%m%d.mseed')

best,
Tobias

3

Windows platform does not permit colons in the file name, so no, under Windows you can’t use the timestamp directly in the filename. Pity, I know. You will have to somehow normalize the filename first.

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