def checksum(self):
with HDF(self.uname) as hdf:
try:
return int(hdf.store[HDF_CHKSUM_FMT.format(self.sname)])
except KeyError, e:
logging.warning("HDFStore - checksum: {}".format(e))
return 0
def _append(self, value, aformat, append, columns, dropna, **kwargs):
import pandas as pd
ktuple = tuple(((k, v if isinstance(v, tuple) else tuple(v)) for k,
v in kwargs.items()))
_args = (dataframe_checksum(value), self.uname, self.sname, aformat,
append, columns, dropna, ktuple)
# escape None for hashing
args = map(lambda x: 0 if x is None else x, _args)
chksum = hash(tuple(args))
# logging.debug(' chksum: {}'.format(chksum))
self.manifest._out_hdf_chksum = chksum
logging.debug("HDFStore append - _out_hdf_chksum {}".format(chksum))
with HDF(self.uname) as hdf:
hdf.store.append(self.sname, value, aformat, append, columns,
dropna, **kwargs)
# write checksum
hsname = HDF_CHKSUM_FMT.format(self.sname)
if append:
pchksum = int(hdf.store[hsname])
chksum = pchksum + chksum
hdf.store.append(hsname, pd.Series([str(chksum)]), append=False)