Rich comparison operator ‘<=’.
Comparing two UTCDateTime object will always compare timestamps rounded to a precision of 6 digits by default.
>>> t1 = UTCDateTime(123.000000099)
>>> t2 = UTCDateTime(123.000000012)
>>> t1 <= t2
True
But the actual timestamp differ
>>> t1.timestamp <= t2.timestamp
False
Resetting the precision changes the behaviour of the operator
>>> t1.precision = 11
>>> t1 <= t2
False