Yet Another Fixed Width Integer (Library)
Project description
yafwi
Yet Another Fixed Width Integer (Library)
Simple fixed with integers for developer experimentation.
Usage
Installation
Available through yafwi - PyPI using pip install yafwi
.
Some Examples
>>> from yafwi import *
>>> from yafwi import __all__
>>> __all__
('FixedWidthInt', 'BaseFixedWidthInt', 'generate_int',
'int8', 'int16', 'int32', 'int64', 'int128', 'int256',
'uint8', 'uint16', 'uint32', 'uint64', 'uint128', 'uint256',
'sbyte', 'byte', 'short', 'ushort', 'int_', 'uint', 'long', 'ulong')
>>> int8(120)
int8(120)
>>> int8(120) + 120 # Arithmetic with Python int preserves type
int8(-16)
>>> int8(120) + int16(120) # Arithmetic will take result in larger width
int16(240)
>>> int16.max, int16.min # Utility sentinels
(int16(32767), int16(-32768))
>>> uint32.min, uint32.max
(uint32(0), uint32(4294967295))
>>> int8(0b11110000) # Utility represenations
int8(-16)
>>> int8(0b11110000).bin
'0b11110000'
>>> int8(0b11110000).hex
'0xf0'
>>> (~int8(0b10010110)).bin
'0b01101001'
>>> (int8(0b10010110) >> 2).bin
'0b11100101'
>>> (int8(0b10010110) << 2).bin
'0b01011000'
>>> ((uint32(uint8.max) << 10 | uint8.max) ^ uint32.max - (1 << 31)).bin
'0b01111111111111000000001100000000'
>>> bytes(uint32(8)) # Output depends on system byteorder
b'\x08\x00\x00\x00'
>>> uint32(8).hex # Output independent of system byteorder
'0x00000008'
Convenient Aliases
>>> from yafwi import *
>>> uint is uint32
True
>>> long is int64
True
>>> ushort is uint16
True
[...]
Arbitrary Sizes
>>> import yafwi
>>> yafwi.generate_int(1024, unsigned=True)
<class 'yafwi.uint1024'>
>>> yafwi.int512
<class 'yafwi.int512'>
>>> yafwi.int3.max, yafwi.int3.min # Including some fun ones...
(int3(3), int3(-4))
Platform Independence
If run on a big-endian system, the bytes associated with the numbers will be different, but higher-level functionality should remain unchanged.
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