[BUG] could not read .med file

[ekremekc]

Describe the bug meshio is not reading the .med file, which is generated in Salome 9.7.0

To Reproduce import meshio meshio.read('pipe.med')

Output of the console

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.10/site-packages/meshio/_helpers.py", line 71, in read
    return _read_file(Path(filename), file_format)
  File "/usr/lib/python3.10/site-packages/meshio/_helpers.py", line 103, in _read_file
    return reader_map[file_format](str(path))
  File "/usr/lib/python3.10/site-packages/meshio/med/_med.py", line 114, in read
    mesh = Mesh(
  File "/usr/lib/python3.10/site-packages/meshio/_mesh.py", line 181, in __init__
    if len(data[k]) != len(self.cells[k]):
TypeError: len() of unsized object

Mesh file

Mesh file can be found in here.

Thank you for your time!

[smr02]

I'm facing the same issue. It seems to be fixed by replacing: https://github.com/nschloe/meshio/blob/0138cc8692b806b44b32d344f7961e8370121ff7/src/meshio/_mesh.py#L179 with

for k in [i for i, x in enumerate(data) if x is not None]:

however, I've not done much testing if this causes other problems.