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Add example for auto-renaming.

This commit is contained in:
Raymond Hettinger 2009-04-08 07:49:03 +00:00
parent 2352cf3519
commit 4c0b1e4026
1 changed files with 12 additions and 1 deletions
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Doc/whatsnew/3.1.rst
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@ -228,7 +228,18 @@ New, Improved, and Deprecated Modules
*rename* which lets invalid fieldnames be automatically converted to
positional names in the form _0, _1, etc. This is useful when
the field names are being created by an external source such as a
CSV header, SQL field list, or user input.
CSV header, SQL field list, or user input::
>>> query = input('Enter a query: ')
Enter a query: SELECT region, dept, count(*) FROM main GROUPBY region, dept
>>> cursor.execute(query)
>>> query_fields = [desc[0] for desc in cursor.description]
>>> UserQuery = namedtuple('UserQuery', query_fields, rename=True)
>>> pprint.pprint([UserQuery(*row) for row in cursor])
[UserQuery(region='South', dept='Shipping', _2=185),
UserQuery(region='North', dept='Accounting', _2=37),
UserQuery(region='West', dept='Sales', _2=419)]
(Contributed by Raymond Hettinger; :issue:`1818`.)