Batch renaming files in iPython

ipy_batch_rename.py

# infile is 'rename_mapping.txt' tab-sep: oldname newname
# ext of file to be replace can be specified
 
with open('rename_mapping.txt', 'r') as fh:
    map = { line.strip().split()[0]:line.strip().split()[1] for line in fh.readlines()   }
oldnames = !ls *.fastq.gz
for oldname in oldnames:
    if oldname in map:
        newname = map[oldname]
        !mv $oldname $newname