Empty output files list if filename contains metacharacters in dcm2nii

[qian587]

Summary

If the dcm2nii output file names contain regex metacharacters (eg: [] or *) nipype dcm2nii interface is not able to parse the output filename properly and will return empty output files.

Actual behavior

from nipype.interfaces.dcm2nii import Dcm2niix
converter = Dcm2niix()
converter.inputs.source_dir = 'testdicomdir'
converter.inputs.anon_bids = True
converter.inputs.bids_format = True
converter.inputs.compress = 'y'
converter.inputs.compression = 6
converter.inputs.out_filename = '%d'
output = converter.run()
>>> Convert 109 DICOM as /opt/work/[DICOMEXAMPLE_-_Frame_1_of_6] 
Compress: "/usr/bin/pigz" -b 960 -n -f -6 "/opt/work/[DICOMEXAMPLE_-_Frame_1_of_6].nii"

output.outputs 
>>> bids = <undefined>
>>> bvals = <undefined>
>>> bvecs = <undefined>
>>> converted_files = <undefined>

Expected behavior

output.outputs 
>>> bids = <undefined>
>>> bvals = <undefined>
>>> bvecs = <undefined>
>>> converted_files = <undefined>
bids = ['/opt/work/[DICOMEXAMPLE_-_Frame_1_of_6].json']
bvals = <undefined>
bvecs = <undefined>
converted_files = ['/opt/work/[DICOMEXAMPLE_-_Frame_1_of_6].nii.gz']

How to replicate the behavior

Set the output filename template to a name that contains metacharacters

Platform details:

nipype.get_info()
{'pkg_path': '/usr/local/lib/python3.6/dist-packages/nipype', 'commit_source': 'installation', 'commit_hash': '071523a50', 'nipype_version': '1.5.1', 'sys_version': '3.6.9 (default, Jan 26 2021, 15:33:00) \n[GCC 8.4.0]', 'sys_executable': '/usr/bin/python3', 'sys_platform': 'linux', 'numpy_version': '1.18.5', 'scipy_version': '1.5.4', 'networkx_version': '2.5.1', 'nibabel_version': '3.1.1', 'traits_version': '6.2.0'}

Execution environment

• Container: neurodebian:bionic
• Python version: 3.6.9