| import os |
| import shutil |
|
|
|
|
| class StreamingDemo(object): |
|
|
| def __init__(self, npoints=50, nbatches=5): |
| self.npoints = npoints |
| self.nbatches = nbatches |
|
|
| def params(*args, **kwargs): |
| """ Get analysis-specific parameters """ |
| raise NotImplementedError |
|
|
| def run(*args, **kwargs): |
| """ Run the streaming demo """ |
| raise NotImplementedError |
|
|
| @staticmethod |
| def make(demoname, *args, **kwargs): |
| """ Create a streaming demo """ |
|
|
| from mlstreaming.kmeans import StreamingKMeans |
|
|
| DEMOS = { |
| 'kmeans': StreamingKMeans |
| } |
| return DEMOS[demoname](*args, **kwargs) |
|
|
| def setup(self, path, overwrite=False): |
| """ Setup paths for a streaming demo where temporary data will be read / written""" |
|
|
| if os.path.isdir(path): |
| if overwrite: |
| shutil.rmtree(path) |
| os.mkdir(path) |
| else: |
| raise Exception('Base directory %s already exists and overwrite is set to False' % path) |
| else: |
| os.mkdir(path) |
|
|
| datain = os.path.join(path, 'input') |
| dataout = os.path.join(path, 'output') |
| if os.path.isdir(datain): |
| shutil.rmtree(datain) |
| if os.path.isdir(dataout): |
| shutil.rmtree(dataout) |
| os.mkdir(datain) |
| os.mkdir(dataout) |
| self.datain = datain |
| self.dataout = dataout |
| return self |
|
|
| def writepoints(self, pts, i): |
| """ Write data points in a form that can be read by MLlib's vector parser """ |
|
|
| f = file(os.path.join(self.datain, 'batch%g.txt' % i), 'w') |
| s = map(lambda p: ",".join(str(p).split()).replace('[,', '[').replace(',]', ']'), pts) |
| tmp = "\n".join(s) |
| f.write(tmp) |
| f.close() |
|
|
|
|
