human
... but still, it crashes becasue we haven't specified any _list_outputs() method. I.e. our python function is called, but the interface crashes when the execution arrives to retrieving the outputs.
Let's fix that:"
Please write code following the instructions in jupyter notebook style.
assistant
#Here is code to .

from nipype.interfaces.base import BaseInterfaceInputSpec, BaseInterface, File, TraitedSpec

class TranslateImageInputSpec(BaseInterfaceInputSpec):
    in_file = File(exists=True, mandatory=True, desc='the input image')
    out_file = File(mandatory=True, desc='the output image') # Do not set exists=True !!
    translation = traits.List([50.0, 0.0, 0.0], traits.Float, usedefault=True,
                              desc='the translation component of the input transform')
    
class TranslateImageOutputSpec(TraitedSpec):
    out_file = File(desc='the output image')

class TranslateImage(BaseInterface):
    input_spec = TranslateImageInputSpec
    output_spec = TranslateImageOutputSpec
    
    def _run_interface(self, runtime):

        # Call our python code here:
        translate_image(
            self.inputs.in_file,
            self.inputs.translation,
            self.inputs.out_file
        )
        # And we are done
        return runtime

    def _list_outputs(self):
        return {'out_file': self.inputs.out_file}