Bytes converter python3. Convert bytes to KB, MB, GB, TB, PB and explanation on difference between byte, bit, kB, KiB, KB, kb and ko

byte_converter.py

def get_printable_size(byte_size):
    """
    A bit is the smallest unit, it's either 0 or 1
    1 byte = 1 octet = 8 bits
    1 kB = 1 kilobyte = 1000 bytes = 10^3 bytes
    1 KiB = 1 kibibyte = 1024 bytes = 2^10 bytes
    1 KB = 1 kibibyte OR kilobyte ~= 1024 bytes ~= 2^10 bytes (it usually means 1024 bytes but sometimes it's 1000... ask the sysadmin ;) )
    1 kb = 1 kilobits = 1000 bits (this notation should not be used, as it is very confusing)
    1 ko = 1 kilooctet = 1000 octets = 1000 bytes = 1 kB

    Also Kb seems to be a mix of KB and kb, again it depends on context.

    In linux, a byte (B) is composed by a sequence of bits (b). One byte has 256 possible values.

    More info : http://www.linfo.org/byte.html
    """
    BASE_SIZE = 1024.00
    MEASURE = ["B", "KB", "MB", "GB", "TB", "PB"]

    def _fix_size(size, size_index):
        if not size:
            return "0"
        elif size_index == 0:
            return str(size)
        else:
            return "{:.3f}".format(size)

    current_size = byte_size
    size_index = 0

    while current_size >= BASE_SIZE and len(MEASURE) != size_index:
        current_size = current_size / BASE_SIZE
        size_index = size_index + 1

    size = _fix_size(current_size, size_index)
    measure = MEASURE[size_index]
    return size + measure