bytes to to mb, gb, etc in python

bytesto.py

def bytesto(bytes, to, bsize=1024):
    """convert bytes to megabytes, etc.
       sample code:
           print('mb= ' + str(bytesto(314575262000000, 'm')))

       sample output: 
           mb= 300002347.946
    """

    a = {'k' : 1, 'm': 2, 'g' : 3, 't' : 4, 'p' : 5, 'e' : 6 }
    r = float(bytes)
    for i in range(a[to]):
        r = r / bsize

    return(r)

when i use the function of sys.getsizeof() , how to Convert into mb, gb, etc .
thanks

Nice job. i use this along with psutil for sys admin reports

Thank you, it helped me a lot to clear my mind.
I just got rid of the for-loop like so:

def bytesto(bytes, to, bsize=1024): 
    a = {'k' : 1, 'm': 2, 'g' : 3, 't' : 4, 'p' : 5, 'e' : 6 }
    r = float(bytes)
    return bytes / (bsize ** a[to])

Thank you. I needed this for a quick customer op.

thanks , very help full , need to change the bytes to days
1.4492465e+07 to day