![]() ![]() If set False, the returned connection may be shared across multiple threads. off, no type detection), you can set it to any combination of PARSE_DECLTYPES and PARSE_COLNAMES to turn type detection on.īy default, check_same_thread is True and only the creating thread may use the connection. The detect_types parameter and the using custom converters registered with the module-level register_converter() function allow you to easily do that.ĭetect_types defaults to 0 (i. If you want to use other types you must add support for them yourself. SQLite natively supports only the types TEXT, INTEGER, REAL, BLOB and NULL. The default for the timeout parameter is 5.0 (five seconds).įor the isolation_level parameter, please see the isolation_level property of Connection objects. The timeout parameter specifies how long the connection should wait for the lock to go away until raising an exception. ![]() When a database is accessed by multiple connections, and one of the processes modifies the database, the SQLite database is locked until that transaction is committed. You can use ":memory:" to open a database connection to a database that resides in RAM instead of on disk. Opens a connection to the SQLite database file database. if you use something like 'as "x "' in your SQL, then we will parse out everything until the first blank for the column name: the column name would simply be “x”. The column name found in scription is only the first word of the column name, i. It will try to find an entry of ‘mytype’ in the converters dictionary and then use the converter function found there to return the value. It will look for a string formed in there, and then decide that ‘mytype’ is the type of the column. Setting this makes the SQLite interface parse the column name for each column it returns. Then for that column, it will look into the converters dictionary and use the converter function registered for that type there. for “integer primary key”, it will parse out “integer”, or for “number(10)” it will parse out “number”. ![]() It will parse out the first word of the declared type, i. Setting it makes the sqlite3 module parse the declared type for each column it returns. This constant is meant to be used with the detect_types parameter of the connect() function. sqlite_version_info The version number of the run-time SQLite library, as a tuple of integers. sqlite_version The version number of the run-time SQLite library, as a string. This is not the version of the SQLite library. version_info The version number of this module, as a tuple of integers. version The version number of this module, as a string. Here the data will be stored in the example.db file:ġ2.6.1. To use the module, you must first create a Connection object that represents the database. It provides a SQL interface compliant with the DB-API 2.0 specification described by PEP 249. The sqlite3 module was written by Gerhard Häring. It’s also possible to prototype an application using SQLite and then port the code to a larger database such as PostgreSQL or Oracle. Some applications can use SQLite for internal data storage. SQLite is a C library that provides a lightweight disk-based database that doesn’t require a separate server process and allows accessing the database using a nonstandard variant of the SQL query language. sqlite3 - DB-API 2.0 interface for SQLite databases Using the connection as a context managerġ2.6. Accessing columns by name instead of by index Converting SQLite values to custom Python types Using adapters to store additional Python types in SQLite databases
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