def main():
args = sys.argv
if len(args) < 4:
print(
"usage: {} <ini with vars> <ini-that-needs-interpolation> <interpolated-ini>"
.format(args[0]))
exit(1)
vars_ini_fn, src_ini_fn, target_ini_fn = sys.argv[1:]
src_ini = ConfigParser()
src_ini.read(vars_ini_fn)
sections = {}
for section in src_ini.sections():
items = dict(src_ini.items(section))
tpt = namedtuple(section, items.keys())
sections[section] = tpt._make(items.values())
with open(src_ini_fn) as sf:
src_ini = sf.read()
with open(target_ini_fn, 'w') as tf:
try:
tf.write(src_ini.format(**sections))
except AttributeError as e:
print('Interpolation error: {}'.format(e.message))
