def persist_pathways(self):
ensure_dir(PATHWAY_FILE_PATH)
try:
f = open(PATHWAY_FILE_PATH, "w") # write mode to replace any old version of the file
# TODO need to make sure that changes aren't going to be lost with multiple instances
# overwriting each other. For now just stick to workflows that will prevent this.
pickle.dump(self._pathways, f)
f.close()
except IOError:
raise IOError("unable to save pathways")
def __init__(self):
# Unpickle list of pathways if present
ensure_dir(PATHWAY_FILE_PATH)
try:
f = open(PATHWAY_FILE_PATH, "r")
self._pathways = pickle.load(f)
f.close()
except IOError:
# file doesn't exist, use empty list
self._pathways = []