content: """ Module to give helpful messages to the user that did not
  compile the scikit properly.
  """
  import os
  
  INPLACE_MSG = """
  It appears that you are importing a local scikit-learn source tree. For
  this, you need to have an inplace install. Maybe you are in the source
  directory and you need to try from another location."""
  
  STANDARD_MSG = """
  If you have used an installer, please check that it is suited for your
  Python version, your operating system and your platform."""
  
  
  def raise_build_error(e):
      # Raise a comprehensible error and list the contents of the
      # directory to help debugging on the mailing list.
      local_dir = os.path.split(__file__)[0]
      msg = STANDARD_MSG
      if local_dir == "sklearn/__check_build":
          # Picking up the local install: this will work only if the
          # install is an 'inplace build'
          msg = INPLACE_MSG
      dir_content = list()
      for i, filename in enumerate(os.listdir(local_dir)):
          if ((i + 1) % 3):
              dir_content.append(filename.ljust(26))
          else:
              dir_content.append(filename + '\n')
      raise ImportError("""%s
  ___________________________________________________________________________
  Contents of %s:
  %s
  ___________________________________________________________________________
  It seems that scikit-learn has not been built correctly.
  
  If you have installed scikit-learn from source, please do not forget
  to build the package before using it: run `python setup.py install` or
  `make` in the source directory.
  %s""" % (e, local_dir, ''.join(dir_content).strip(), msg))
  
  try:
      from ._check_build import check_build  # noqa
  except ImportError as e:
      raise_build_error(e)
  