Add Access SQLite Result Values By Name With Row Factory as a Python TIL

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jbranchaud
2026-07-25 10:15:15 -05:00
parent da556a3903
commit 8247e798ee
2 changed files with 37 additions and 1 deletions
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@@ -10,7 +10,7 @@ working across different projects via [VisualMode](https://www.visualmode.dev/).
For a steady stream of TILs, [sign up for my newsletter](https://visualmode.kit.com/newsletter).
_1835 TILs and counting..._
_1836 TILs and counting..._
See some of the other learning resources I work on:
@@ -1068,6 +1068,7 @@ If you've learned something here, support my efforts writing daily TILs by
- [Access Instance Variables](python/access-instance-variables.md)
- [Access Most Recent Return Value In REPL](python/access-most-recent-return-value-in-repl.md)
- [Access SQLite Result Values By Name With Row Factory](python/access-sqlite-result-values-by-name-with-row-factory.md)
- [Access Variables Outside Loop Scope](python/access-variables-outside-loop-scope.md)
- [Argument Defaults Are Evaluated When Function Is Defined](python/argument-defaults-are-evaluated-when-function-is-defined.md)
- [Assert Is Only A Development Check](python/assert-is-only-a-development-check.md)
@@ -0,0 +1,35 @@
# Access SQLite Result Values By Name With Row Factory
The default shape of a result from executing a row-returning statement with
`sqlite3` is a tuple. Whose values can be accessed positionally.
```python
>>> res = conn.execute("select * from projects;")
>>> res.fetchone()
(1, 'py-vmt', '2026-07-25 14:53:44', '2026-07-25 14:53:44')
```
If I want something a bit nicer, I can enable [_Row Factory_
results](https://docs.python.org/3/library/sqlite3.html#how-to-create-and-use-row-factories)
for my connection. The values on a _row_ can be accessed by name as well as
positionally.
```python
>>> conn.row_factory = sqlite3.Row
>>> res = conn.execute("select * from projects;")
>>> res.fetchone()
<sqlite3.Row object at 0x1019e3c40>
>>> r1 = _
>>> r1
<sqlite3.Row object at 0x1019e3c40>
>>> r1["name"]
'py-vmt'
>>> r1["id"]
1
>>> r1[1]
'py-vmt'
```
[I used Row Factory on a project
recently](https://github.com/jbranchaud/py-vmt/pull/9/changes) and I think it
made for an improvement in the readability of the code.