merge_mdf returns 'none' : 'Mdf' object has no attribute 'merge_Mdf'

[trophysss]

Python version

3.7

Platform information

pycharm

Numpy version

1.17.2

mdfreader version

3.3

I am trying to merge multiple files in same directory but after merge process merged data turns 'None'

merged_mdf = mdfreader.Mdf(Path(directory, files[0])) merged_mdf.resample(0.1) for i in range(1, (len(files)-1)): mdf2 = mdfreader.Mdf(Path(directory, files[i])) mdf2 .resample(0.1) merged_mdf = merged_mdf.merge_mdf(mdf2 ) merged_mdf.write()

I have debugged with 2 file and both Mdf version 3.0.

Thanks in advance