transport.py

import bw2data as bd
db = bd.Database("Transport routes")
# Compatible with legacy - "new_node" is 2.5 only
my_route = bd.new_activity(
    name="Transport from CN to EU",
    unit="trip",
    code="surf-practice"
)
my_route.save()

my_route.new_exchange(
    input=china_transport,
    amount="200"  # tkm
).save()
my_route.new_exchange(
    input=sea_transport,
    amount="10000"  # tkm
).save()
my_route.new_exchange(
    input=eur_transport,
    amount="100"  # tkm
).save()