def calcHashAndSize(self):
if os.path.isfile(self.fileName + ".fileDat"):
with open(self.fileName + ".fileDat", 'rb') as f:
fd = pickle.load(f)
h, fileSize = fd.fileHash, fd.fileSize
else:
h = Hash()
BUF_SIZE = 65536
fileSize = 0
with open(self.fileName, 'rb') as f:
while True:
data = f.read(BUF_SIZE)
if not data:
break
h.update(data)
fileSize += len(data)
h = h.calculateHash()
return h, fileSize
