[aklug] Re: How would you write "rebase" in...

* Christopher Howard <christopher.howard@frigidcode.com> [110802 21:15]:
> other bases. The function shall take two parameters: a parameter "d"
> representing the original decimal number, and a parameter "n"
> representing the base to which to convert. The function shall return a
> string representation of the converted number.
 This is what I have: (written some time ago)
def enbase(num,base,uc=0):
    """Change a to `base' number. Up to base-36 is supported without
special notation. Optional arg `uc' forces alphas to upper case."""
    num_rep={ 10:'a', 11:'b', 12:'c', 13:'d', 14:'e', 15:'f', 16:'g', 17:'h', 18:'i', 19:'j',
              20:'k', 21:'l', 22:'m', 23:'n', 24:'o', 25:'p', 26:'q', 27:'r', 28:'s', 29:'t',
              30:'u', 31:'v', 32:'w', 33:'x', 34:'y', 35:'z'}
    res = []
    current = num
    while current != 0:
        remainder = current % base
        if 36 > remainder > 9:
            remainder_string = num_rep[remainder]
        elif remainder >= 36:
            remainder_string='('+str(remainder)+')'
        else :
            remainder_string = str(remainder)
        res.append(remainder_string)
        current = current / base
    if uc :
        return ''.join(res).upper()
    else :
        return ''.join(res)

## test
## base > 36
>>> tlib.enbase(118,40)
'(38)2'
>>> tlib.enbase(47,40)
'71'
## base < 36
>>> tlib.enbase(47,16)
'f2'
>>> tlib.enbase(47,16,1)
'F2'
>>> tlib.enbase(100,2)
'0010011'
>>> tlib.enbase(126,2)
'0111111'
>>> tlib.enbase(128,2)
'00000001'
>>> tlib.enbase(128,16)
'08'
>>> tlib.enbase(128,8)
'002'
>>> tlib.enbase(127,16)
'f7'
>>> tlib.enbase(127,16,1)
'F7'

-- 
Tim 
tim at johnsons-web dot com or akwebsoft dot com
http://www.akwebsoft.com
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