maximum value for long?
skip at pobox.com
Tue Nov 18 18:43:02 CET 2003
S> I have set ulong_max above to the C compilers ULONG_MAX definition
S> from limits.h I would have expected Python to complain when setting
S> the value of the variable very_long_long to anything greater than
S> ULONG_MAX. Since I am currently doing computations with integer
S> values *much* bigger than ULONG_MAX, this behaviour suites me, but I
S> am wondering if this is a "standard" Python behaviour since I do not
S> want my scripts to become dependant on some obscure non-standard
Python has a builtin unbounded long type. In 2.3, most (all?) operations on
integers will return longs if the op would overflow the machine's int
(typically 32- or 64-bits):
>>> print 17**100
S> Also, if Python really can handle longs that are bigger than the
S> machines native longs, the interpreter has to do some sort of
S> arbitrary precision math somewhere. Could you please point me to the
S> according interpreter's source file(s)?
Look at Objects/longobject.c in the source distribution.
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