text: #!/usr/bin/env python3
  # python_trimmer_example 0.0.1
  
  import os
  import dxpy
  import subprocess
  
  @dxpy.entry_point('main')
  def main(input_file):
  
      # The following line(s) initialize your data object inputs on the platform
      # into dxpy.DXDataObject instances that you can start using immediately.
  
      input_file = dxpy.DXFile(input_file)
  
      # The following line(s) download your file inputs to the local file system
      # using variable names for the filenames.
  
      dxpy.download_dxfile(input_file.get_id(), "input_file")
  
      # Fill in your application code here.
  
      subprocess.check_call("fastq_quality_trimmer -t 20 -Q 33 -i input_file -o output_file", shell=True)
  
      # The following line(s) use the Python bindings to upload your file outputs
      # after you have created them on the local file system.  It assumes that you
      # have used the output field name for the filename for each output, but you
      # can change that behavior to suit your needs.
  
      output_file = dxpy.upload_local_file("output_file");
  
      # The following line fills in some basic dummy output and assumes
      # that you have created variables to represent your output with
      # the same name as your output fields.
  
      output = {}
      output["output_file"] = dxpy.dxlink(output_file)
  
      return output
  
  dxpy.run()
  