Convert any-bit number to decimal number and vise versa.
--bit n to set bit to n
--exp xxx to set expression to xxx
--r to run reversely (from decimal number to any-bit number)
Example:
AB122(16bit) to decimal: python 2deci.py --bit 16 --exp AB122
700706 to 16-bit number: python 2deci.py --bit 16 --exp 700706 --r