title: How to count a channel in mdf file using asammdf library?
body: <p>the mdf file contain many channel with Cha_meas_1,Cha_meas_2,Cha_meas_3,Cha_meas_4,Cha_meas_5,......Cha_meas_15.i want to count the number of channel starting with <strong>Cha_meas</strong>_,</p>
  <p>Currently i am doing as below:</p>
  <pre><code>mdf_data = Data.to_dataframe(ignore_value2text_conversions=True,use_interpolation=False)
  conditional_colum = [col for col in mdf_data.columns if 'Cha_meas_' in col]
  num_cols = len(conditional_colum)
  </code></pre>
  <p>Is there any other way to do the same like counting the channel using asammdf library?</p>