rpm-prereqs.py

import sys, os, rpm

def readRpmHeader(ts, filename):
    """ Read an rpm header. """
    fd = os.open(filename, os.O_RDONLY)
    h = None
    try:
        h = ts.hdrFromFdno(fd)
    finally:
        os.close(fd)
    return h

ts = rpm.TransactionSet()
h = readRpmHeader(ts, sys.argv[1])

ds = h.dsFromHeader()
for d in ds:
    fl = d.Flags()
    if fl & rpm.RPMSENSE_SCRIPT_PRE:
        print '%s: %s' % (fl, d.DNEVR(),)