18.02.14 10:10, Paul Moore написав(ла):
Or alternatively, a "default on None" function - Oracle SQL calls this
nvl, so I will too:
def nvl(x, dflt):
return dflt if x is None else x
results = sorted(invoices, key=lambda x: nvl(x.duedate, datetime(MINYEAR,1,1))
Or, as was proposed above:
results = sorted(invoices,
key=lambda x: (x.duedate is not None, x.duedate))
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