def pack_command(self, *args):
output = []
command = args[0]
if ' ' in command:
args = tuple([Token.get_token(s)
for s in command.split()]) + args[1:]
else:
args = (Token.get_token(command), ) + args[1:]
buff = SYM_EMPTY.join((SYM_STAR, b(str(len(args))), SYM_CRLF))
for arg in imap(self.encoder.encode, args):
if len(buff) > 6000 or len(arg) > 6000:
buff = SYM_EMPTY.join(
(buff, SYM_DOLLAR, b(str(len(arg))), SYM_CRLF))
output.append(buff)
output.append(arg)
buff = SYM_CRLF
else:
buff = SYM_EMPTY.join((buff, SYM_DOLLAR, b(str(len(arg))),
SYM_CRLF, arg, SYM_CRLF))
output.append(buff)
return output
def tsrevrangebytime(self, name, tm_low=None, tm_high=None, num=None,
time_cast_func=DatetimeToTimestamp(pytz.utc),
timestamp_cast_func=TimestampToDatetime(pytz.utc)):
"""
Returns the entries for the given time range
from ``tm_low`` to ``tm_high`` in the time series
that is specified by the given key ``name``.
The entries are returned in descending order of the times.
Special bounds -inf (``tm_low`` is None or -inf) and
+inf (``tm_high`` is None or inf) are also supported to retrieve
an entire range.
If ``num`` is specified, then at most ``num`` entries will be fetched.
``time_cast_func`` a callable used to cast the time ``tm``
to a timestamp - 64 bit signed integer (cf. ``tsadd``).
``timestamp_cast_func`` a callable used to cast the timestamp
return values. It should reflect how timestamp were inserted
(cf. ``time_cast_func``).
"""
pieces = ['TSREVRANGEBYTIME', name]
if tm_low is None or (isinstance(tm_low, float) and isinf(tm_low)):
pieces.append(m_inf)
elif time_cast_func is None:
pieces.append(tm_low)
else:
pieces.append(time_cast_func(tm_low))
if tm_high is None or (isinstance(tm_high, float) and isinf(tm_high)):
pieces.append(p_inf)
elif time_cast_func is None:
pieces.append(tm_high)
else:
pieces.append(time_cast_func(tm_high))
if num is not None:
pieces.extend([Token.get_token('LIMIT'), num])
if timestamp_cast_func is None:
return self.execute_command(*pieces, timestamp_cast_func=int)
return self.execute_command(*pieces,
timestamp_cast_func=timestamp_cast_func)