name_map = {'oldcol1': 'newcol1', 'oldcol2': 'newcol2', 'oldcol3': 'newcol3'...}
for row in rows:
# Each row is a dict of the form: {'oldcol1': '...', 'oldcol2': '...'}
row = dict((name_map[name], val) for name, val in row.iteritems())
...
或在具有Dict理解力的Python2.7 +中：
for row in rows:
row = {name_map[name]: val for name, val in row.items()}
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