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glennzw/gist:5238689

Created March 25, 2013 17:01
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Python dicts - adding if not exist
Raw
gistfile1.txt
#BAD:
if tbl not in all_data:
all_data[tbl] = data
else:
all_data[tbl] += data
#GOOD:
all_data.setdefault(tbl, []).extend(data)
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