def __init__(self,file0):
# If invoke with (src,timestamp), establish a existing file with src and timestamp. lazyRead will
# then try to read data from src if needed.
# If file0=src, especially src is a string, this file is a new one. No data will read from
# src and when writeBack, the file-based location will be used.
# Things are different with a stream source. file0=src(stream), then its totally useless and will
# NEVER get accessed. So passing a None here is quite feasible is necessary.
if type(file0)==tuple:
filetype.__init__(self,file0)
self.finishRead=False
else:
filetype.__init__(self,(file0,utils.timestamp.getTimestamp()))
self.finishRead=True
self.haveRead=0
self.readData=[]
self.kvm=None
def __init__(self,file0):
filetype.__init__(self,file0)
self.oriFile=file0
