将Matlab数据导出到python

Question

I have a sentence ' i am unhappy' stored in variable 'a' in matlab. i want to extract data from matlab to python. like if i write 'a' in python, it should display the whole sentence stored in MATLAB. and yes further i want to convert that sentence into speech using gtts.

i have tried,this:

from scipy.io import loadmat
test = loadmat('value.mat')

but it gives error:

MatReadWarning: Duplicate variable name "None" in stream - replacing 
previous with new Consider mio5.varmats_from_mat to split file into 
single variable files matfile_dict = MR.get_variables(variable_names)

Answer 1

I could test it like this and had no problems:

In matlab:

>> a = ' hello mat file'

a =

 hello mat file

>> filename = 'test.mat'

filename =

test.mat

>> save(filename)

and then in python:

import scipy.io as scio

data = scio.loadmat('test.mat')

data
Out:
{'__header__': b'MATLAB 5.0 MAT-file, Platform: PCWIN64, Created on: Tue Nov 27 10:20:58 2018',
 '__version__': '1.0',
 '__globals__': [],
 'a': array([' hello mat file'], dtype='<U15'),
 'filename': array(['test.mat'], dtype='<U8')}

data['a']
Out: array([' hello mat file'], dtype='<U15')

So no error message here.

However, note that in Matlab save by default saves all content of the current workspace in the mat-file. Could it be possible, that you have created some other variables which perhaps are of an unsupported type?

You could check by simply explicitly saving only your test variable a :

save(filename, 'a')

Does this lead to an importable mat-file in python?