diff options
Diffstat (limited to 'topics')
| -rw-r--r-- | topics/maybe-monad.gmi | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/topics/maybe-monad.gmi b/topics/maybe-monad.gmi index 7f2afa9..dc3e0b7 100644 --- a/topics/maybe-monad.gmi +++ b/topics/maybe-monad.gmi @@ -35,7 +35,7 @@ foo.map(lambda x: 1 + x) \ .bind(print) ``` -Finally, let's put all this together in a practical example using the MonadicDictCursor from genenetwork. Consider the following code using the DictCursor. The column foo may contain NULL values, and we need to check for them. +Finally, let's put all this together in a practical example using sql_query_mdict from genenetwork. Consider the following code using the DictCursor. The column foo may contain NULL values, and we need to check for them. ``` with conn.cursor(MySQLdb.cursors.DictCursor) as cursor: cursor.execute("SELECT foo FROM bar") @@ -43,13 +43,12 @@ with conn.cursor(MySQLdb.cursors.DictCursor) as cursor: if row["foo"] is not None: print(row["foo"]) ``` -But, with the MonadicDictCursor, the row object is a MonadictDict where all values are monadic. We therefore do not need any special conditional checks. +But, with sql_query_mdict, the row object is a MonadictDict where all values are monadic. We therefore do not need any special conditional checks. ``` -with conn.cursor(utility.monads.MonadicDictCursor) as cursor: - cursor.execute("SELECT foo FROM bar") - for row in cursor.fetchall(): - row["foo"].bind(print) +for row in sql_query_mdict("SELECT foo FROM bar"): + row["foo"].bind(print) ``` +As a bonus, sql_query_mdict also gets rid of cursors by returning a generator and letting us iterate over it pythonically. ## Useful Resources |