Lightweight pipeline with multi-threaded operation units.
TinyPipe is a lightweight library that facilitates the application of the Pipeline Pattern. A pipeline has a general form as follows:
|---| |----| |- -| |----| |---| ... -> | Q | -> | OP | -> | Q | -> | OP | -> | Q | -> ... |---| |----| |---| |----| |---|
As data flows through the pipeline, it is first fed into the input queue (denoted as
Q above). The following operation unit (
OP) grabs it and produces a result, which is then fed into its output queue. This process continues until the data encounters a terminating
OP which has no output queue.
Building blocks are provided for pipeline construction, where each operation unit (represented by
Pipe), owns a threads and runs individually. A
ParallelPipe is also included for an operation to run with multiple threads. See the documentation for detail.
Python version: 3.6+ (other versions not tested, feel free to try it out!)
To install TinyPipe:
$ pip install tinypipe
Suppose every data has to go through the functions
f3 in sequence. The pipeline can be constructed by:
import tinypipe as tp # 1. Create pipeline pipeline = tp.Pipeline() # 2. Append pipes to pipeline f1_pipe = tp.pipe.FunctionPipe(f1) pipeline.append(f1_pipe) f2_pipe = tp.pipe.FunctionPipe(f2) pipeline.append(f2_pipe) f3_pipe = tp.pipe.FunctionPipe(f3) pipeline.append(f3_pipe) # One can call `pipeline.extend([f1_pipe, f2_pipe, f3_pipe])` instead # 3. Build & start the pipeline # Once the pipeline is started, it will keep trying to get data to process # # The following `pipeline.build()` call is optional. `pipeline.start()` will # make the call if it is not called. # # pipeline.build() pipeline.start() # 5. Feed data into the pipeline data_iterator = ... for data in data_iterator: pipeline.put(data) # 6. If all the data has been passed into the pipeline, # wait for it to finish all the work. pipeline.join()
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