Seg2 read error for NOTE keyword

[HZeyen]

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Bug Summary

Hi, I am having problems reading seg2 files if the keyword 'NOTE' exists but has no contents behind :

Initial code (function "parse_free_form" near the end, around line 327 in file seg2.py:

       if key == 'NOTE':
            value = [cleanup_and_decode_string(line)
                     for line in value.split(self.line_terminator)
                     if line]
        else:
            value = cleanup_and_decode_string(value)

I suggest:

        if key == 'NOTE':
            try:
                value = [cleanup_and_decode_string(line)
                         for line in value.split(self.line_terminator)
                         if line]
            except:
                value = ''
        else:
            value = cleanup_and_decode_string(value)

Rec_00001.zip

Code to Reproduce

from obspy.io.seg2 import seg2
filename = "rec_00001.seg2"
st = seg2._read_seg2(filename)

Error Traceback

Traceback (most recent call last):

  File "C:\Users\Hermann\anaconda3\envs\pg\lib\site-packages\spyder_kernels\py3compat.py", line 356, in compat_exec
    exec(code, globals, locals)

  File "c:\sources_2010\python_programs\obspy_error.py", line 13, in <module>
    st = seg2._read_seg2(filename)

  File "C:\Users\Hermann\anaconda3\envs\pg\lib\site-packages\obspy\io\seg2\seg2.py", line 364, in _read_seg2
    st = seg2.read_file(filename)

  File "C:\Users\Hermann\anaconda3\envs\pg\lib\site-packages\obspy\io\seg2\seg2.py", line 83, in read_file
    self.read_file_descriptor_block()

  File "C:\Users\Hermann\anaconda3\envs\pg\lib\site-packages\obspy\io\seg2\seg2.py", line 167, in read_file_descriptor_block
    self.parse_free_form(

  File "C:\Users\Hermann\anaconda3\envs\pg\lib\site-packages\obspy\io\seg2\seg2.py", line 329, in parse_free_form
    for line in value.split(self.line_terminator)

TypeError: must be str or None, not bytes

ObsPy Version?

1.3.0

Operating System?

Windows

Python Version?

3.8.13

Installation Method?

conda

[QuLogic]

Fixed by #3178.