Package twisted :: Package flow :: Module base |
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## Module twisted.flow.base

flow.base

This module contains the core exceptions and base classes in the flow module. See flow.flow for more detailed information

Classes
`CallLater` | Instruction to support callbacks
`Controller` | Flow controller
`Cooperate` | Requests that processing be paused so other tasks can resume Yield this object when the current chain would block or periodically during an intensive processing task.
`Instruction` | Has special meaning when yielded in a flow
`Stage` | Abstract base defining protocol for iterator/generators in a flow This is the primary component in the flow system, it is an iterable object which must be passed to a yield statement before each call to next().

Exceptions
`NotReadyError` | Raised when a stage has not been subject to a yield
`Unsupported` | Indicates that the given stage does not know what to do with the flow instruction that was returned.

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