Python 2.7 quick reference |  |
Python 2.7 quick reference | |
Python values of type int represent
integers, that is, whole numbers in the range
[-231,
231-1], roughly plus or
minus two billion.
You can represent a value in octal (base 8) by preceding it
with “0o”. Similarly, use a
leading “0x” to represent a value
in hexadecimal (base 16), or “0b”
for binary. Examples in conversational mode:
>>> 999+1 1000 >>> 0o77 63 >>> 0xff 255 >>> 0b1001 9
The 0o and 0b prefixes work
only in Python versions 2.6 and later. In 2.5 and earlier
versions, any number starting with “0” was considered to be octal. This functionality is
retained in the 2.6+ versions, but will not work in the
Python 3.x versions.
To convert other numbers or character strings to type
int, see Section 20.19, “int(): Convert to int type”.
If you perform operations on int values
that result in numbers that are too large, Python
automatically converts them to long type;
see Section 7.2, “Type long: Extended-precision
integers”.