Python:Numbers

NOTE: Numbers starting with 0 are interpreted as octal number.

Look at this:

>>> a = 0123
>>> print(a)
83
>>> type(a)
<type 'int'>

int(x)

Convert x into an integer

hex(x)

Convert x into an hexadecimal number 0x....

oct(x)

Convert x into an octal number 0....

See Python:Strings#Advanced for conversions by format.