docs: def download_har_dataset():
      """
      Download human activity recognition dataset from UCI ML Repository and store it at /tsfresh/notebooks/data.
      
      Examples
      ========
  
      >>> from tsfresh.examples import har_dataset
      >>> har_dataset.download_har_dataset()
      """
  
      zipurl = 'https://github.com/MaxBenChrist/human-activity-dataset/blob/master/UCI%20HAR%20Dataset.zip?raw=true'
  
      if os.path.exists(data_file_name_dataset) and os.path.exists(data_file_name_classes):
          _logger.warning("You have already downloaded the Human Activity Data Set.")
          return
  
      with urlopen(zipurl) as zipresp:
          with ZipFile(BytesIO(zipresp.read())) as zfile:
              zfile.extractall(path=data_file_name)
          zfile.close()