0.24 Python bindings/Advanced

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This page is for advanced objects, not included in the normal import of the bindings, and for most purposes are not needed.

Connection Classes

DBConnection

This connection takes a single input, dbconn, which is a dictionary containing:

  • DBUserName
  • DBHostName
  • DBPassword
  • DBName
  • DBPort

This class provides automatic connection pooling. All database access is performed through the cursor interface, and in order to maintain thread safety, a single connection will only be shared among cursors of the same thread. If more threads attempt to access the database simultaneously than there are connections, a new single use connection will be opened for that specific cursor.

'release' and 'acquire' methods are available to manage the use of connections in the pool, and to automatically spawn new ones if needed. '__enter__' and '__exit__' exist for use as a context manager, and will return a new cursor to use. Each thread is given its own stack in the context manager, so multiple nested cursors are allowed.

The pool size is adjustable. The default pool size for new connection objects can be set with the 'setDefaultSize' classmethod, and an existing connection can be resized with the 'resizePool' method.

BEConnection

This connection takes the following inputs:

  • backend - must be an IP address
  • port
  • localname=None - if not set, will pull it from socket.gethostname()
  • opts=None - a BEConnOpts dictionary providing the capabilities of the connection
  • deadline=10 - a float specifying how long a query may wait for a response

FEConnection

XMLConnection

DBCache

BECache

BEEvent

Data Handling Classes

DictData

DBData

DBDataWrite

DBDataRef

DBDataCRef

Assorted Utility

schemaUpdate

databaseSearch

SplitInt

CMPVideo

CMPRecord

deadlinesocket

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