class_docstr: Handle FSL ``output_type`` and version information.
  
  output type refers to the type of file fsl defaults to writing
  eg, NIFTI, NIFTI_GZ
  
  Examples
  --------
  
  >>> from nipype.interfaces.fsl import Info
  >>> Info.version()  # doctest: +SKIP
  >>> Info.output_type()  # doctest: +SKIP
docstr: Grab an image from the standard location.
  
  Returns a list of standard images if called without arguments.
  
  Could be made more fancy to allow for more relocatability
docstr_tok: ["Grab","an","image","from","the","standard","location",".","Returns","a","list","of","standard","images","if","called","without","arguments",".","Could","be","made","more","fancy","to","allow","for","more","relocatability"]
code: def standard_image(img_name=None):
      """Grab an image from the standard location.
  
      Returns a list of standard images if called without arguments.
  
      Could be made more fancy to allow for more relocatability"""
      try:
          fsldir = os.environ["FSLDIR"]
      except KeyError:
          raise Exception("FSL environment variables not set")
      stdpath = os.path.join(fsldir, "data", "standard")
      if img_name is None:
          return [
              filename.replace(stdpath + "/", "")
              for filename in glob(os.path.join(stdpath, "*nii*"))
          ]
      return os.path.join(stdpath, img_name)
  
imports: from glob import glob
  import os
  from ...None import logging
  from ...utils.filemanip import fname_presuffix
  from ..base import traits, isdefined, CommandLine, CommandLineInputSpec, PackageInfo
  from ...external.due import BibTeX
label_desc: Use image node_id 4 for calling the Info obj's underlying member method code with example usage: obj.standard_image(img_name) and returns: os, unknown