def getCached(dbPath, experimentName, experimentOptions, meta, verbose=False):
if meta == None or (isinstance(meta, basestring) and not os.path.exists(meta)): # nothing to compare with
if verbose:
print "No existing metadata file", [meta]
return None
# Load previous experiment
meta = getMeta(meta)
# Load current experiment
template = buildExamples.parseExperiment(experimentName).copy()
template = parseTemplateOptions(experimentOptions, template)
# Get database information
dbPath = os.path.abspath(os.path.expanduser(dbPath))
dbModified = time.strftime("%c", time.localtime(os.path.getmtime(dbPath)))
# Compare settings
metaExp = meta["experiment"]
if verbose:
print "dbPath", dbPath
print "dbFile", metaExp["dbFile"]
print "dbModified", dbModified
print "metaExp['dbModified']", metaExp["dbModified"]
print "template", json.dumps(template)
print "meta['template']", json.dumps(meta["template"])
if metaExp["dbFile"] == dbPath and metaExp["dbModified"] == dbModified and template == meta["template"]:
return meta # is the same experiment
else:
return None # previous experiment differs
def getExperiment(experiment, experimentOptions=None, database=settings.DB_PATH, writer='writeNumpyText', useCached=True,
featureFilePath=None, labelFilePath=None, metaFilePath=None, cacheDir=os.path.join(tempfile.gettempdir(), "CAMDA2014"), verbose=False):
"""
Get a cached experiment, or re-calculate if not cached.
experiment = Name of the experiment template in settings.py (such as REMISSION)
experimentOptions = comma-separated list of key=value pairs, the keys will replace those
with the same name in the experiment template. Values are evaluated.
database = Path to the SQLite database (see data/example.py)
hidden = How to process hidden donors (see data/example.py)
writer = Output format (see data/example.py)
useCache = Whether to use the cache directory. If False, X, y and meta paths must be defined.
featureFilePath = X, can be None if useCache == True.
labelFilePath = y, can be None if useCache == True.
metaFilePath = Meta-data, can be None if useCache == True. If already exists, the experiment
will be compared to this. If they are identical, the cached version is used.
cacheDir = Where cached experiments are stored.
"""
cached = None
if experiment != None and useCached:
template = buildExamples.parseExperiment(experiment).copy()
template = buildExamples.parseTemplateOptions(experimentOptions, template)
project = template.get("project", "")
projectId = "".join([c if c.isalpha() or c.isdigit() or c=="-" else "_" for c in project]).strip()
tId = experiment + "_" + projectId + "_" + getTemplateId(template)
if featureFilePath == None:
featureFilePath = os.path.join(cacheDir, tId + "-X")
if labelFilePath == None:
labelFilePath = os.path.join(cacheDir, tId + "-y")
if metaFilePath == None:
metaFilePath = os.path.join(cacheDir, tId + "-meta.json")
if os.path.exists(metaFilePath):
print "Comparing to cached experiment", metaFilePath
cached = getCached(database, experiment, experimentOptions, metaFilePath, verbose)
else:
print "Metafile path does not exist:", metaFilePath
if cached != None:
print "Using cached examples"
featureFilePath = cached["experiment"].get("X", None)
labelFilePath = cached["experiment"].get("y", None)
print "Experiment files"
print "X:", featureFilePath
print "y:", labelFilePath
print "meta:", metaFilePath
if cached == None:
print "Building examples for experiment", experiment, "at cache directory:", cacheDir
buildExamples.writeExamples(dbPath=database, experimentName=experiment, experimentOptions=experimentOptions,
writer=evalWriter(writer), featureFilePath=featureFilePath,
labelFilePath=labelFilePath, metaFilePath=metaFilePath)
return featureFilePath, labelFilePath, metaFilePath