def create_fragment_from_process(self, process_ref, ref_flow=None, background=False, background_children=True):
"""
The major entry into fragment building. Given only a process ref, construct a fragment from the process,
using the process's reference exchange as the reference fragment flow.
:param process_ref:
:param ref_flow:
:param background: [False] add as a background fragment and do not traverse children
:param background_children: [True] automatically terminate child flows with background references (ecoinvent).
:return:
"""
process = process_ref.fg()
if ref_flow is None:
if len(process.reference_entity) == 0:
ref = pick_one([x for x in self.db.filter_exch(process_ref, elem=False) if x.direction == 'Output']
).flow
elif len(process.reference_entity) > 1:
ref = pick_reference(process)
else:
ref = list(process.reference_entity)[0].flow
else:
try:
ref = next(x.flow for x in process.reference_entity if x.flow.match(ref_flow))
except StopIteration:
print('Reference flow not found in target process.')
return None
ref_exch = next(x for x in process.exchange(ref))
direction = comp_dir(ref_exch.direction)
frag = self[0].create_fragment(ref, direction, Name='%s' % process_ref.entity(), background=background)
frag.terminate(process_ref, flow=ref)
if not background:
self.build_child_flows(frag, background_children=background_children)
return frag
def _find_rf(p, ref_flow=None):
if ref_flow is None:
if len(p.reference_entity) > 1:
print('This process has multiple allocations. Select reference flow:')
ref_flow = pick_reference(p)
else:
ref_flow = list(p.reference_entity)[0].flow
return [x.flow for x in p.reference_entity if x.flow.match(ref_flow)][0]
def _find_rf(p, ref_flow=None):
if ref_flow is None:
if len(p.reference_entity) > 1:
print('This process has multiple allocations. Select reference flow:')
ref_flow = pick_reference(p)
else:
ref_flow = list(p.reference_entity)[0].flow
return [x.flow for x in p.reference_entity if x.flow.match(ref_flow)][0]