scipy.io.matlab.

varmats_from_mat

scipy.io.matlab.varmats_from_mat(file_obj)

Pull variables out of mat 5 file as a sequence of mat file objects

This can be useful with a difficult mat file, containing unreadable variables. This routine pulls the variables out in raw form and puts them, unread, back into a file stream for saving or reading. Another use is the pathological case where there is more than one variable of the same name in the file; this routine returns the duplicates, whereas the standard reader will overwrite duplicates in the returned dictionary.

The file pointer in file_obj will be undefined. File pointers for the returned file-like objects are set at 0.

Parameters:

file_objfile-like

file object containing mat file

Returns:

named_matslist

list contains tuples of (name, BytesIO) where BytesIO is a file-like object containing mat file contents as for a single variable. The BytesIO contains a string with the original header and a single var. If var_file_obj is an individual BytesIO instance, then save as a mat file with something like open('test.mat', 'wb').write(var_file_obj.read())

Examples

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>>> import scipy.io
>>> import numpy as np
>>> from io import BytesIO
>>> from scipy.io.matlab._mio5 import varmats_from_mat
>>> mat_fileobj = BytesIO()
>>> scipy.io.savemat(mat_fileobj, {'b': np.arange(10), 'a': 'a string'})
>>> varmats = varmats_from_mat(mat_fileobj)
>>> sorted([name for name, str_obj in varmats])
['a', 'b']

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