delta-find: move the emotion of parents in a dedicated method
After splitting the filtering, and with the `_candidate_groups` layer removed,
we can start splitting the group generation too. This helps to organize this
code and make it easier to modifying the future.
import sys
def flush():
sys.stdout.flush()
sys.stderr.flush()
globalvars = {}
lines = sys.stdin.readlines()
while lines:
l = lines.pop(0)
if l.startswith('SALT'):
print(l[:-1])
elif l.startswith('>>> '):
snippet = l[4:]
while lines and lines[0].startswith('... '):
l = lines.pop(0)
snippet += l[4:]
c = compile(snippet, '<heredoc>', 'single')
try:
flush()
exec(c, globalvars)
flush()
except Exception as inst:
flush()
print(repr(inst))