Brace expansion in python glob

Question

I have python 2.7 and am trying to issue:

glob('{faint,bright*}/{science,calib}/chip?/')

I obtain no matches, however from the shell echo {faint,bright*}/{science,calib}/chip? gives:

faint/science/chip1 faint/science/chip2 faint/calib/chip1 faint/calib/chip2 bright1/science/chip1 bright1/science/chip2 bright1w/science/chip1 bright1w/science/chip2 bright2/science/chip1 bright2/science/chip2 bright2w/science/chip1 bright2w/science/chip2 bright1/calib/chip1 bright1/calib/chip2 bright1w/calib/chip1 bright1w/calib/chip2 bright2/calib/chip1 bright2/calib/chip2 bright2w/calib/chip1 bright2w/calib/chip2

What is wrong with my expression?

Answer 1

{..} is known as brace expansion, and is a separate step applied before globbing takes place.

It's not part of globs, and not supported by the python glob function.