code: def load_files(filenames,multiproc=False,**kwargs):
      
      filenames = np.atleast_1d(filenames)
      logger.debug("Loading %s files..."%len(filenames))
  
      kwargs = [dict(filename=f,**kwargs) for f in filenames]
  
      if multiproc:
          from multiprocessing import Pool
          processes = multiproc if multiproc > 0 else None
          p = Pool(processes,maxtasksperchild=1)
          out = p.map(load_file,kwargs)
      else:
          out = [load_file(kw) for kw in kwargs]
  
      dtype = out[0].dtype
      for i,d in enumerate(out):
          if d.dtype != dtype: 
              # ADW: Not really safe...
              logger.warn("Casting input data to same type.")
              out[i] = d.astype(dtype,copy=False)
  
      logger.debug('Concatenating arrays...')
      return np.concatenate(out)
docs: Load a set of FITS files with kwargs.